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d4b9fe801f
prometheus/tsdb/db_test.go
Ganesh Vernekar d4b9fe801f
M-map full chunks of Head from disk (#6679) 
When appending to the head and a chunk is full it is flushed to the disk and m-mapped (memory mapped) to free up memory

Prom startup now happens in these stages
 - Iterate the m-maped chunks from disk and keep a map of series reference to its slice of mmapped chunks.
- Iterate the WAL as usual. Whenever we create a new series, look for it's mmapped chunks in the map created before and add it to that series.

If a head chunk is corrupted the currpted one and all chunks after that are deleted and the data after the corruption is recovered from the existing WAL which means that a corruption in m-mapped files results in NO data loss.

[Mmaped chunks format](https://github.com/prometheus/prometheus/blob/master/tsdb/docs/format/head_chunks.md)  - main difference is that the chunk for mmaping now also includes series reference because there is no index for mapping series to chunks.
[The block chunks](https://github.com/prometheus/prometheus/blob/master/tsdb/docs/format/chunks.md) are accessed from the index which includes the offsets for the chunks in the chunks file - example - chunks of series ID have offsets 200, 500 etc in the chunk files.
In case of mmaped chunks, the offsets are stored in memory and accessed from that. During WAL replay, these offsets are restored by iterating all m-mapped chunks as stated above by matching the series id present in the chunk header and offset of that chunk in that file.

**Prombench results**

_WAL Replay_

1h Wal reply time
30% less wal reply time - 4m31 vs 3m36
2h Wal reply time
20% less wal reply time - 8m16 vs 7m

_Memory During WAL Replay_

High Churn:
10-15% less RAM -  32gb vs 28gb
20% less RAM after compaction 34gb vs 27gb
No Churn:
20-30% less RAM -  23gb vs 18gb
40% less RAM after compaction 32.5gb vs 20gb

Screenshots are in [this comment](https://github.com/prometheus/prometheus/pull/6679#issuecomment-621678932)


Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>
2020-05-06 21:00:00 +05:30

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// Copyright 2017 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tsdb
import (
"context"
"encoding/binary"
"fmt"
"hash/crc32"
"io/ioutil"
"math"
"math/rand"
"os"
"path"
"path/filepath"
"sort"
"strconv"
"sync"
"testing"
"time"
"github.com/go-kit/kit/log"
"github.com/oklog/ulid"
"github.com/pkg/errors"
"github.com/prometheus/client_golang/prometheus"
prom_testutil "github.com/prometheus/client_golang/prometheus/testutil"
"github.com/prometheus/prometheus/pkg/labels"
"github.com/prometheus/prometheus/storage"
"github.com/prometheus/prometheus/tsdb/chunks"
"github.com/prometheus/prometheus/tsdb/fileutil"
"github.com/prometheus/prometheus/tsdb/index"
"github.com/prometheus/prometheus/tsdb/record"
"github.com/prometheus/prometheus/tsdb/tombstones"
"github.com/prometheus/prometheus/tsdb/tsdbutil"
"github.com/prometheus/prometheus/tsdb/wal"
"github.com/prometheus/prometheus/util/testutil"
)
func openTestDB(t testing.TB, opts *Options, rngs []int64) (db *DB, close func()) {
tmpdir, err := ioutil.TempDir("", "test")
testutil.Ok(t, err)
if len(rngs) == 0 {
db, err = Open(tmpdir, nil, nil, opts)
} else {
opts, rngs = validateOpts(opts, rngs)
db, err = open(tmpdir, nil, nil, opts, rngs)
}
testutil.Ok(t, err)
// Do not close the test database by default as it will deadlock on test failures.
return db, func() {
testutil.Ok(t, os.RemoveAll(tmpdir))
}
}
// query runs a matcher query against the querier and fully expands its data.
func query(t testing.TB, q storage.Querier, matchers ...*labels.Matcher) map[string][]tsdbutil.Sample {
ss, ws, err := q.Select(false, nil, matchers...)
defer func() {
testutil.Ok(t, q.Close())
}()
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
result := map[string][]tsdbutil.Sample{}
for ss.Next() {
series := ss.At()
samples := []tsdbutil.Sample{}
it := series.Iterator()
for it.Next() {
t, v := it.At()
samples = append(samples, sample{t: t, v: v})
}
testutil.Ok(t, it.Err())
if len(samples) == 0 {
continue
}
name := series.Labels().String()
result[name] = samples
}
testutil.Ok(t, ss.Err())
return result
}
// Ensure that blocks are held in memory in their time order
// and not in ULID order as they are read from the directory.
func TestDB_reloadOrder(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
metas := []BlockMeta{
{MinTime: 90, MaxTime: 100},
{MinTime: 70, MaxTime: 80},
{MinTime: 100, MaxTime: 110},
}
for _, m := range metas {
createBlock(t, db.Dir(), genSeries(1, 1, m.MinTime, m.MaxTime))
}
testutil.Ok(t, db.reload())
blocks := db.Blocks()
testutil.Equals(t, 3, len(blocks))
testutil.Equals(t, metas[1].MinTime, blocks[0].Meta().MinTime)
testutil.Equals(t, metas[1].MaxTime, blocks[0].Meta().MaxTime)
testutil.Equals(t, metas[0].MinTime, blocks[1].Meta().MinTime)
testutil.Equals(t, metas[0].MaxTime, blocks[1].Meta().MaxTime)
testutil.Equals(t, metas[2].MinTime, blocks[2].Meta().MinTime)
testutil.Equals(t, metas[2].MaxTime, blocks[2].Meta().MaxTime)
}
func TestDataAvailableOnlyAfterCommit(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
_, err := app.Add(labels.FromStrings("foo", "bar"), 0, 0)
testutil.Ok(t, err)
querier, err := db.Querier(context.TODO(), 0, 1)
testutil.Ok(t, err)
seriesSet := query(t, querier, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar"))
testutil.Equals(t, map[string][]tsdbutil.Sample{}, seriesSet)
err = app.Commit()
testutil.Ok(t, err)
querier, err = db.Querier(context.TODO(), 0, 1)
testutil.Ok(t, err)
defer querier.Close()
seriesSet = query(t, querier, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar"))
testutil.Equals(t, map[string][]tsdbutil.Sample{`{foo="bar"}`: {sample{t: 0, v: 0}}}, seriesSet)
}
func TestDataNotAvailableAfterRollback(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
_, err := app.Add(labels.FromStrings("foo", "bar"), 0, 0)
testutil.Ok(t, err)
err = app.Rollback()
testutil.Ok(t, err)
querier, err := db.Querier(context.TODO(), 0, 1)
testutil.Ok(t, err)
defer querier.Close()
seriesSet := query(t, querier, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar"))
testutil.Equals(t, map[string][]tsdbutil.Sample{}, seriesSet)
}
func TestDBAppenderAddRef(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app1 := db.Appender()
ref1, err := app1.Add(labels.FromStrings("a", "b"), 123, 0)
testutil.Ok(t, err)
// Reference should already work before commit.
err = app1.AddFast(ref1, 124, 1)
testutil.Ok(t, err)
err = app1.Commit()
testutil.Ok(t, err)
app2 := db.Appender()
// first ref should already work in next transaction.
err = app2.AddFast(ref1, 125, 0)
testutil.Ok(t, err)
ref2, err := app2.Add(labels.FromStrings("a", "b"), 133, 1)
testutil.Ok(t, err)
testutil.Assert(t, ref1 == ref2, "")
// Reference must be valid to add another sample.
err = app2.AddFast(ref2, 143, 2)
testutil.Ok(t, err)
err = app2.AddFast(9999999, 1, 1)
testutil.Equals(t, storage.ErrNotFound, errors.Cause(err))
testutil.Ok(t, app2.Commit())
q, err := db.Querier(context.TODO(), 0, 200)
testutil.Ok(t, err)
res := query(t, q, labels.MustNewMatcher(labels.MatchEqual, "a", "b"))
testutil.Equals(t, map[string][]tsdbutil.Sample{
labels.FromStrings("a", "b").String(): {
sample{t: 123, v: 0},
sample{t: 124, v: 1},
sample{t: 125, v: 0},
sample{t: 133, v: 1},
sample{t: 143, v: 2},
},
}, res)
}
func TestAppendEmptyLabelsIgnored(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app1 := db.Appender()
ref1, err := app1.Add(labels.FromStrings("a", "b"), 123, 0)
testutil.Ok(t, err)
// Construct labels manually so there is an empty label.
ref2, err := app1.Add(labels.Labels{labels.Label{Name: "a", Value: "b"}, labels.Label{Name: "c", Value: ""}}, 124, 0)
testutil.Ok(t, err)
// Should be the same series.
testutil.Equals(t, ref1, ref2)
err = app1.Commit()
testutil.Ok(t, err)
}
func TestDeleteSimple(t *testing.T) {
numSamples := int64(10)
cases := []struct {
Intervals tombstones.Intervals
remaint []int64
}{
{
Intervals: tombstones.Intervals{{Mint: 0, Maxt: 3}},
remaint: []int64{4, 5, 6, 7, 8, 9},
},
{
Intervals: tombstones.Intervals{{Mint: 1, Maxt: 3}},
remaint: []int64{0, 4, 5, 6, 7, 8, 9},
},
{
Intervals: tombstones.Intervals{{Mint: 1, Maxt: 3}, {Mint: 4, Maxt: 7}},
remaint: []int64{0, 8, 9},
},
{
Intervals: tombstones.Intervals{{Mint: 1, Maxt: 3}, {Mint: 4, Maxt: 700}},
remaint: []int64{0},
},
{ // This case is to ensure that labels and symbols are deleted.
Intervals: tombstones.Intervals{{Mint: 0, Maxt: 9}},
remaint: []int64{},
},
}
Outer:
for _, c := range cases {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
smpls := make([]float64, numSamples)
for i := int64(0); i < numSamples; i++ {
smpls[i] = rand.Float64()
app.Add(labels.Labels{{Name: "a", Value: "b"}}, i, smpls[i])
}
testutil.Ok(t, app.Commit())
// TODO(gouthamve): Reset the tombstones somehow.
// Delete the ranges.
for _, r := range c.Intervals {
testutil.Ok(t, db.Delete(r.Mint, r.Maxt, labels.MustNewMatcher(labels.MatchEqual, "a", "b")))
}
// Compare the result.
q, err := db.Querier(context.TODO(), 0, numSamples)
testutil.Ok(t, err)
res, ws, err := q.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "a", "b"))
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
expSamples := make([]tsdbutil.Sample, 0, len(c.remaint))
for _, ts := range c.remaint {
expSamples = append(expSamples, sample{ts, smpls[ts]})
}
expss := newMockSeriesSet([]storage.Series{
newSeries(map[string]string{"a": "b"}, expSamples),
})
for {
eok, rok := expss.Next(), res.Next()
testutil.Equals(t, eok, rok)
if !eok {
continue Outer
}
sexp := expss.At()
sres := res.At()
testutil.Equals(t, sexp.Labels(), sres.Labels())
smplExp, errExp := expandSeriesIterator(sexp.Iterator())
smplRes, errRes := expandSeriesIterator(sres.Iterator())
testutil.Equals(t, errExp, errRes)
testutil.Equals(t, smplExp, smplRes)
}
}
}
func TestAmendDatapointCausesError(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
_, err := app.Add(labels.Labels{{Name: "a", Value: "b"}}, 0, 0)
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
app = db.Appender()
_, err = app.Add(labels.Labels{{Name: "a", Value: "b"}}, 0, 1)
testutil.Equals(t, storage.ErrDuplicateSampleForTimestamp, err)
testutil.Ok(t, app.Rollback())
}
func TestDuplicateNaNDatapointNoAmendError(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
_, err := app.Add(labels.Labels{{Name: "a", Value: "b"}}, 0, math.NaN())
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
app = db.Appender()
_, err = app.Add(labels.Labels{{Name: "a", Value: "b"}}, 0, math.NaN())
testutil.Ok(t, err)
}
func TestNonDuplicateNaNDatapointsCausesAmendError(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
_, err := app.Add(labels.Labels{{Name: "a", Value: "b"}}, 0, math.Float64frombits(0x7ff0000000000001))
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
app = db.Appender()
_, err = app.Add(labels.Labels{{Name: "a", Value: "b"}}, 0, math.Float64frombits(0x7ff0000000000002))
testutil.Equals(t, storage.ErrDuplicateSampleForTimestamp, err)
}
func TestEmptyLabelsetCausesError(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
_, err := app.Add(labels.Labels{}, 0, 0)
testutil.NotOk(t, err)
testutil.Equals(t, "empty labelset: invalid sample", err.Error())
}
func TestSkippingInvalidValuesInSameTxn(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
// Append AmendedValue.
app := db.Appender()
_, err := app.Add(labels.Labels{{Name: "a", Value: "b"}}, 0, 1)
testutil.Ok(t, err)
_, err = app.Add(labels.Labels{{Name: "a", Value: "b"}}, 0, 2)
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
// Make sure the right value is stored.
q, err := db.Querier(context.TODO(), 0, 10)
testutil.Ok(t, err)
ssMap := query(t, q, labels.MustNewMatcher(labels.MatchEqual, "a", "b"))
testutil.Equals(t, map[string][]tsdbutil.Sample{
labels.New(labels.Label{Name: "a", Value: "b"}).String(): {sample{0, 1}},
}, ssMap)
// Append Out of Order Value.
app = db.Appender()
_, err = app.Add(labels.Labels{{Name: "a", Value: "b"}}, 10, 3)
testutil.Ok(t, err)
_, err = app.Add(labels.Labels{{Name: "a", Value: "b"}}, 7, 5)
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
q, err = db.Querier(context.TODO(), 0, 10)
testutil.Ok(t, err)
ssMap = query(t, q, labels.MustNewMatcher(labels.MatchEqual, "a", "b"))
testutil.Equals(t, map[string][]tsdbutil.Sample{
labels.New(labels.Label{Name: "a", Value: "b"}).String(): {sample{0, 1}, sample{10, 3}},
}, ssMap)
}
func TestDB_Snapshot(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer closeFn()
// append data
app := db.Appender()
mint := int64(1414141414000)
for i := 0; i < 1000; i++ {
_, err := app.Add(labels.FromStrings("foo", "bar"), mint+int64(i), 1.0)
testutil.Ok(t, err)
}
testutil.Ok(t, app.Commit())
testutil.Ok(t, app.Rollback())
// create snapshot
snap, err := ioutil.TempDir("", "snap")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(snap))
}()
testutil.Ok(t, db.Snapshot(snap, true))
testutil.Ok(t, db.Close())
// reopen DB from snapshot
db, err = Open(snap, nil, nil, nil)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, db.Close()) }()
querier, err := db.Querier(context.TODO(), mint, mint+1000)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, querier.Close()) }()
// sum values
seriesSet, ws, err := querier.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar"))
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
sum := 0.0
for seriesSet.Next() {
series := seriesSet.At().Iterator()
for series.Next() {
_, v := series.At()
sum += v
}
testutil.Ok(t, series.Err())
}
testutil.Ok(t, seriesSet.Err())
testutil.Equals(t, 1000.0, sum)
}
// TestDB_Snapshot_ChunksOutsideOfCompactedRange ensures that a snapshot removes chunks samples
// that are outside the set block time range.
// See https://github.com/prometheus/prometheus/issues/5105
func TestDB_Snapshot_ChunksOutsideOfCompactedRange(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer closeFn()
app := db.Appender()
mint := int64(1414141414000)
for i := 0; i < 1000; i++ {
_, err := app.Add(labels.FromStrings("foo", "bar"), mint+int64(i), 1.0)
testutil.Ok(t, err)
}
testutil.Ok(t, app.Commit())
testutil.Ok(t, app.Rollback())
snap, err := ioutil.TempDir("", "snap")
testutil.Ok(t, err)
// Hackingly introduce "race", by having lower max time then maxTime in last chunk.
db.head.maxTime = db.head.maxTime - 10
defer func() {
testutil.Ok(t, os.RemoveAll(snap))
}()
testutil.Ok(t, db.Snapshot(snap, true))
testutil.Ok(t, db.Close())
// Reopen DB from snapshot.
db, err = Open(snap, nil, nil, nil)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, db.Close()) }()
querier, err := db.Querier(context.TODO(), mint, mint+1000)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, querier.Close()) }()
// Sum values.
seriesSet, ws, err := querier.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar"))
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
sum := 0.0
for seriesSet.Next() {
series := seriesSet.At().Iterator()
for series.Next() {
_, v := series.At()
sum += v
}
testutil.Ok(t, series.Err())
}
testutil.Ok(t, seriesSet.Err())
// Since we snapshotted with MaxTime - 10, so expect 10 less samples.
testutil.Equals(t, 1000.0-10, sum)
}
func TestDB_SnapshotWithDelete(t *testing.T) {
numSamples := int64(10)
db, closeFn := openTestDB(t, nil, nil)
defer closeFn()
app := db.Appender()
smpls := make([]float64, numSamples)
for i := int64(0); i < numSamples; i++ {
smpls[i] = rand.Float64()
app.Add(labels.Labels{{Name: "a", Value: "b"}}, i, smpls[i])
}
testutil.Ok(t, app.Commit())
cases := []struct {
intervals tombstones.Intervals
remaint []int64
}{
{
intervals: tombstones.Intervals{{Mint: 1, Maxt: 3}, {Mint: 4, Maxt: 7}},
remaint: []int64{0, 8, 9},
},
}
Outer:
for _, c := range cases {
// TODO(gouthamve): Reset the tombstones somehow.
// Delete the ranges.
for _, r := range c.intervals {
testutil.Ok(t, db.Delete(r.Mint, r.Maxt, labels.MustNewMatcher(labels.MatchEqual, "a", "b")))
}
// create snapshot
snap, err := ioutil.TempDir("", "snap")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(snap))
}()
testutil.Ok(t, db.Snapshot(snap, true))
testutil.Ok(t, db.Close())
// reopen DB from snapshot
db, err = Open(snap, nil, nil, nil)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, db.Close()) }()
// Compare the result.
q, err := db.Querier(context.TODO(), 0, numSamples)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, q.Close()) }()
res, ws, err := q.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "a", "b"))
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
expSamples := make([]tsdbutil.Sample, 0, len(c.remaint))
for _, ts := range c.remaint {
expSamples = append(expSamples, sample{ts, smpls[ts]})
}
expss := newMockSeriesSet([]storage.Series{
newSeries(map[string]string{"a": "b"}, expSamples),
})
if len(expSamples) == 0 {
testutil.Assert(t, res.Next() == false, "")
continue
}
for {
eok, rok := expss.Next(), res.Next()
testutil.Equals(t, eok, rok)
if !eok {
continue Outer
}
sexp := expss.At()
sres := res.At()
testutil.Equals(t, sexp.Labels(), sres.Labels())
smplExp, errExp := expandSeriesIterator(sexp.Iterator())
smplRes, errRes := expandSeriesIterator(sres.Iterator())
testutil.Equals(t, errExp, errRes)
testutil.Equals(t, smplExp, smplRes)
}
}
}
func TestDB_e2e(t *testing.T) {
const (
numDatapoints = 1000
numRanges = 1000
timeInterval = int64(3)
)
// Create 8 series with 1000 data-points of different ranges and run queries.
lbls := []labels.Labels{
{
{Name: "a", Value: "b"},
{Name: "instance", Value: "localhost:9090"},
{Name: "job", Value: "prometheus"},
},
{
{Name: "a", Value: "b"},
{Name: "instance", Value: "127.0.0.1:9090"},
{Name: "job", Value: "prometheus"},
},
{
{Name: "a", Value: "b"},
{Name: "instance", Value: "127.0.0.1:9090"},
{Name: "job", Value: "prom-k8s"},
},
{
{Name: "a", Value: "b"},
{Name: "instance", Value: "localhost:9090"},
{Name: "job", Value: "prom-k8s"},
},
{
{Name: "a", Value: "c"},
{Name: "instance", Value: "localhost:9090"},
{Name: "job", Value: "prometheus"},
},
{
{Name: "a", Value: "c"},
{Name: "instance", Value: "127.0.0.1:9090"},
{Name: "job", Value: "prometheus"},
},
{
{Name: "a", Value: "c"},
{Name: "instance", Value: "127.0.0.1:9090"},
{Name: "job", Value: "prom-k8s"},
},
{
{Name: "a", Value: "c"},
{Name: "instance", Value: "localhost:9090"},
{Name: "job", Value: "prom-k8s"},
},
}
seriesMap := map[string][]tsdbutil.Sample{}
for _, l := range lbls {
seriesMap[labels.New(l...).String()] = []tsdbutil.Sample{}
}
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
for _, l := range lbls {
lset := labels.New(l...)
series := []tsdbutil.Sample{}
ts := rand.Int63n(300)
for i := 0; i < numDatapoints; i++ {
v := rand.Float64()
series = append(series, sample{ts, v})
_, err := app.Add(lset, ts, v)
testutil.Ok(t, err)
ts += rand.Int63n(timeInterval) + 1
}
seriesMap[lset.String()] = series
}
testutil.Ok(t, app.Commit())
// Query each selector on 1000 random time-ranges.
queries := []struct {
ms []*labels.Matcher
}{
{
ms: []*labels.Matcher{labels.MustNewMatcher(labels.MatchEqual, "a", "b")},
},
{
ms: []*labels.Matcher{
labels.MustNewMatcher(labels.MatchEqual, "a", "b"),
labels.MustNewMatcher(labels.MatchEqual, "job", "prom-k8s"),
},
},
{
ms: []*labels.Matcher{
labels.MustNewMatcher(labels.MatchEqual, "a", "c"),
labels.MustNewMatcher(labels.MatchEqual, "instance", "localhost:9090"),
labels.MustNewMatcher(labels.MatchEqual, "job", "prometheus"),
},
},
// TODO: Add Regexp Matchers.
}
for _, qry := range queries {
matched := labels.Slice{}
for _, ls := range lbls {
s := labels.Selector(qry.ms)
if s.Matches(ls) {
matched = append(matched, ls)
}
}
sort.Sort(matched)
for i := 0; i < numRanges; i++ {
mint := rand.Int63n(300)
maxt := mint + rand.Int63n(timeInterval*int64(numDatapoints))
expected := map[string][]tsdbutil.Sample{}
// Build the mockSeriesSet.
for _, m := range matched {
smpls := boundedSamples(seriesMap[m.String()], mint, maxt)
if len(smpls) > 0 {
expected[m.String()] = smpls
}
}
q, err := db.Querier(context.TODO(), mint, maxt)
testutil.Ok(t, err)
ss, ws, err := q.Select(false, nil, qry.ms...)
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
result := map[string][]tsdbutil.Sample{}
for ss.Next() {
x := ss.At()
smpls, err := expandSeriesIterator(x.Iterator())
testutil.Ok(t, err)
if len(smpls) > 0 {
result[x.Labels().String()] = smpls
}
}
testutil.Ok(t, ss.Err())
testutil.Equals(t, expected, result)
q.Close()
}
}
}
func TestWALFlushedOnDBClose(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer closeFn()
dirDb := db.Dir()
lbls := labels.Labels{labels.Label{Name: "labelname", Value: "labelvalue"}}
app := db.Appender()
_, err := app.Add(lbls, 0, 1)
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
testutil.Ok(t, db.Close())
db, err = Open(dirDb, nil, nil, nil)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, db.Close()) }()
q, err := db.Querier(context.TODO(), 0, 1)
testutil.Ok(t, err)
values, ws, err := q.LabelValues("labelname")
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
testutil.Equals(t, []string{"labelvalue"}, values)
}
func TestWALSegmentSizeOptions(t *testing.T) {
tests := map[int]func(dbdir string, segmentSize int){
// Default Wal Size.
0: func(dbDir string, segmentSize int) {
filesAndDir, err := ioutil.ReadDir(filepath.Join(dbDir, "wal"))
testutil.Ok(t, err)
files := []os.FileInfo{}
for _, f := range filesAndDir {
if !f.IsDir() {
files = append(files, f)
}
}
// All the full segment files (all but the last) should match the segment size option.
for _, f := range files[:len(files)-1] {
testutil.Equals(t, int64(DefaultOptions().WALSegmentSize), f.Size(), "WAL file size doesn't match WALSegmentSize option, filename: %v", f.Name())
}
lastFile := files[len(files)-1]
testutil.Assert(t, int64(DefaultOptions().WALSegmentSize) > lastFile.Size(), "last WAL file size is not smaller than the WALSegmentSize option, filename: %v", lastFile.Name())
},
// Custom Wal Size.
2 * 32 * 1024: func(dbDir string, segmentSize int) {
filesAndDir, err := ioutil.ReadDir(filepath.Join(dbDir, "wal"))
testutil.Ok(t, err)
files := []os.FileInfo{}
for _, f := range filesAndDir {
if !f.IsDir() {
files = append(files, f)
}
}
testutil.Assert(t, len(files) > 1, "current WALSegmentSize should result in more than a single WAL file.")
// All the full segment files (all but the last) should match the segment size option.
for _, f := range files[:len(files)-1] {
testutil.Equals(t, int64(segmentSize), f.Size(), "WAL file size doesn't match WALSegmentSize option, filename: %v", f.Name())
}
lastFile := files[len(files)-1]
testutil.Assert(t, int64(segmentSize) > lastFile.Size(), "last WAL file size is not smaller than the WALSegmentSize option, filename: %v", lastFile.Name())
},
// Wal disabled.
-1: func(dbDir string, segmentSize int) {
// Check that WAL dir is not there.
_, err := os.Stat(filepath.Join(dbDir, "wal"))
testutil.NotOk(t, err)
// Check that there is chunks dir.
_, err = os.Stat(mmappedChunksDir(dbDir))
testutil.Ok(t, err)
},
}
for segmentSize, testFunc := range tests {
t.Run(fmt.Sprintf("WALSegmentSize %d test", segmentSize), func(t *testing.T) {
opts := DefaultOptions()
opts.WALSegmentSize = segmentSize
db, closeFn := openTestDB(t, opts, nil)
defer closeFn()
app := db.Appender()
for i := int64(0); i < 155; i++ {
_, err := app.Add(labels.Labels{labels.Label{Name: "wal", Value: "size"}}, i, rand.Float64())
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
}
dbDir := db.Dir()
testutil.Ok(t, db.Close())
testFunc(dbDir, int(opts.WALSegmentSize))
})
}
}
func TestTombstoneClean(t *testing.T) {
numSamples := int64(10)
db, closeFn := openTestDB(t, nil, nil)
defer closeFn()
app := db.Appender()
smpls := make([]float64, numSamples)
for i := int64(0); i < numSamples; i++ {
smpls[i] = rand.Float64()
app.Add(labels.Labels{{Name: "a", Value: "b"}}, i, smpls[i])
}
testutil.Ok(t, app.Commit())
cases := []struct {
intervals tombstones.Intervals
remaint []int64
}{
{
intervals: tombstones.Intervals{{Mint: 1, Maxt: 3}, {Mint: 4, Maxt: 7}},
remaint: []int64{0, 8, 9},
},
}
for _, c := range cases {
// Delete the ranges.
// create snapshot
snap, err := ioutil.TempDir("", "snap")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(snap))
}()
testutil.Ok(t, db.Snapshot(snap, true))
testutil.Ok(t, db.Close())
// reopen DB from snapshot
db, err = Open(snap, nil, nil, nil)
testutil.Ok(t, err)
defer db.Close()
for _, r := range c.intervals {
testutil.Ok(t, db.Delete(r.Mint, r.Maxt, labels.MustNewMatcher(labels.MatchEqual, "a", "b")))
}
// All of the setup for THIS line.
testutil.Ok(t, db.CleanTombstones())
// Compare the result.
q, err := db.Querier(context.TODO(), 0, numSamples)
testutil.Ok(t, err)
defer q.Close()
res, ws, err := q.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "a", "b"))
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
expSamples := make([]tsdbutil.Sample, 0, len(c.remaint))
for _, ts := range c.remaint {
expSamples = append(expSamples, sample{ts, smpls[ts]})
}
expss := newMockSeriesSet([]storage.Series{
newSeries(map[string]string{"a": "b"}, expSamples),
})
if len(expSamples) == 0 {
testutil.Assert(t, res.Next() == false, "")
continue
}
for {
eok, rok := expss.Next(), res.Next()
testutil.Equals(t, eok, rok)
if !eok {
break
}
sexp := expss.At()
sres := res.At()
testutil.Equals(t, sexp.Labels(), sres.Labels())
smplExp, errExp := expandSeriesIterator(sexp.Iterator())
smplRes, errRes := expandSeriesIterator(sres.Iterator())
testutil.Equals(t, errExp, errRes)
testutil.Equals(t, smplExp, smplRes)
}
for _, b := range db.Blocks() {
testutil.Equals(t, tombstones.NewMemTombstones(), b.tombstones)
}
}
}
// TestTombstoneCleanFail tests that a failing TombstoneClean doesn't leave any blocks behind.
// When TombstoneClean errors the original block that should be rebuilt doesn't get deleted so
// if TombstoneClean leaves any blocks behind these will overlap.
func TestTombstoneCleanFail(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
var expectedBlockDirs []string
// Create some empty blocks pending for compaction.
// totalBlocks should be >=2 so we have enough blocks to trigger compaction failure.
totalBlocks := 2
for i := 0; i < totalBlocks; i++ {
blockDir := createBlock(t, db.Dir(), genSeries(1, 1, 0, 1))
block, err := OpenBlock(nil, blockDir, nil)
testutil.Ok(t, err)
// Add some fake tombstones to trigger the compaction.
tomb := tombstones.NewMemTombstones()
tomb.AddInterval(0, tombstones.Interval{Mint: 0, Maxt: 1})
block.tombstones = tomb
db.blocks = append(db.blocks, block)
expectedBlockDirs = append(expectedBlockDirs, blockDir)
}
// Initialize the mockCompactorFailing with a room for a single compaction iteration.
// mockCompactorFailing will fail on the second iteration so we can check if the cleanup works as expected.
db.compactor = &mockCompactorFailing{
t: t,
blocks: db.blocks,
max: totalBlocks + 1,
}
// The compactor should trigger a failure here.
testutil.NotOk(t, db.CleanTombstones())
// Now check that the CleanTombstones didn't leave any blocks behind after a failure.
actualBlockDirs, err := blockDirs(db.dir)
testutil.Ok(t, err)
testutil.Equals(t, expectedBlockDirs, actualBlockDirs)
}
// mockCompactorFailing creates a new empty block on every write and fails when reached the max allowed total.
type mockCompactorFailing struct {
t *testing.T
blocks []*Block
max int
}
func (*mockCompactorFailing) Plan(dir string) ([]string, error) {
return nil, nil
}
func (c *mockCompactorFailing) Write(dest string, b BlockReader, mint, maxt int64, parent *BlockMeta) (ulid.ULID, error) {
if len(c.blocks) >= c.max {
return ulid.ULID{}, fmt.Errorf("the compactor already did the maximum allowed blocks so it is time to fail")
}
block, err := OpenBlock(nil, createBlock(c.t, dest, genSeries(1, 1, 0, 1)), nil)
testutil.Ok(c.t, err)
testutil.Ok(c.t, block.Close()) // Close block as we won't be using anywhere.
c.blocks = append(c.blocks, block)
// Now check that all expected blocks are actually persisted on disk.
// This way we make sure that the we have some blocks that are supposed to be removed.
var expectedBlocks []string
for _, b := range c.blocks {
expectedBlocks = append(expectedBlocks, filepath.Join(dest, b.Meta().ULID.String()))
}
actualBlockDirs, err := blockDirs(dest)
testutil.Ok(c.t, err)
testutil.Equals(c.t, expectedBlocks, actualBlockDirs)
return block.Meta().ULID, nil
}
func (*mockCompactorFailing) Compact(string, []string, []*Block) (ulid.ULID, error) {
return ulid.ULID{}, nil
}
func TestTimeRetention(t *testing.T) {
db, closeFn := openTestDB(t, nil, []int64{1000})
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
blocks := []*BlockMeta{
{MinTime: 500, MaxTime: 900}, // Oldest block
{MinTime: 1000, MaxTime: 1500},
{MinTime: 1500, MaxTime: 2000}, // Newest Block
}
for _, m := range blocks {
createBlock(t, db.Dir(), genSeries(10, 10, m.MinTime, m.MaxTime))
}
testutil.Ok(t, db.reload()) // Reload the db to register the new blocks.
testutil.Equals(t, len(blocks), len(db.Blocks())) // Ensure all blocks are registered.
db.opts.RetentionDuration = blocks[2].MaxTime - blocks[1].MinTime
testutil.Ok(t, db.reload())
expBlocks := blocks[1:]
actBlocks := db.Blocks()
testutil.Equals(t, 1, int(prom_testutil.ToFloat64(db.metrics.timeRetentionCount)), "metric retention count mismatch")
testutil.Equals(t, len(expBlocks), len(actBlocks))
testutil.Equals(t, expBlocks[0].MaxTime, actBlocks[0].meta.MaxTime)
testutil.Equals(t, expBlocks[len(expBlocks)-1].MaxTime, actBlocks[len(actBlocks)-1].meta.MaxTime)
}
func TestSizeRetention(t *testing.T) {
db, closeFn := openTestDB(t, nil, []int64{100})
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
blocks := []*BlockMeta{
{MinTime: 100, MaxTime: 200}, // Oldest block
{MinTime: 200, MaxTime: 300},
{MinTime: 300, MaxTime: 400},
{MinTime: 400, MaxTime: 500},
{MinTime: 500, MaxTime: 600}, // Newest Block
}
for _, m := range blocks {
createBlock(t, db.Dir(), genSeries(100, 10, m.MinTime, m.MaxTime))
}
headBlocks := []*BlockMeta{
{MinTime: 700, MaxTime: 800},
}
// Add some data to the WAL.
headApp := db.Head().Appender()
for _, m := range headBlocks {
series := genSeries(100, 10, m.MinTime, m.MaxTime)
for _, s := range series {
it := s.Iterator()
for it.Next() {
tim, v := it.At()
_, err := headApp.Add(s.Labels(), tim, v)
testutil.Ok(t, err)
}
testutil.Ok(t, it.Err())
}
}
testutil.Ok(t, headApp.Commit())
// Test that registered size matches the actual disk size.
testutil.Ok(t, db.reload()) // Reload the db to register the new db size.
testutil.Equals(t, len(blocks), len(db.Blocks())) // Ensure all blocks are registered.
blockSize := int64(prom_testutil.ToFloat64(db.metrics.blocksBytes)) // Use the actual internal metrics.
walSize, err := db.Head().wal.Size()
testutil.Ok(t, err)
// Expected size should take into account block size + WAL size
expSize := blockSize + walSize
actSize, err := fileutil.DirSize(db.Dir())
testutil.Ok(t, err)
testutil.Equals(t, expSize, actSize, "registered size doesn't match actual disk size")
// Create a WAL checkpoint, and compare sizes.
first, last, err := db.Head().wal.Segments()
testutil.Ok(t, err)
_, err = wal.Checkpoint(db.Head().wal, first, last-1, func(x uint64) bool { return false }, 0)
testutil.Ok(t, err)
blockSize = int64(prom_testutil.ToFloat64(db.metrics.blocksBytes)) // Use the actual internal metrics.
walSize, err = db.Head().wal.Size()
testutil.Ok(t, err)
expSize = blockSize + walSize
actSize, err = fileutil.DirSize(db.Dir())
testutil.Ok(t, err)
testutil.Equals(t, expSize, actSize, "registered size doesn't match actual disk size")
// Decrease the max bytes limit so that a delete is triggered.
// Check total size, total count and check that the oldest block was deleted.
firstBlockSize := db.Blocks()[0].Size()
sizeLimit := actSize - firstBlockSize
db.opts.MaxBytes = sizeLimit // Set the new db size limit one block smaller that the actual size.
testutil.Ok(t, db.reload()) // Reload the db to register the new db size.
expBlocks := blocks[1:]
actBlocks := db.Blocks()
blockSize = int64(prom_testutil.ToFloat64(db.metrics.blocksBytes))
walSize, err = db.Head().wal.Size()
testutil.Ok(t, err)
// Expected size should take into account block size + WAL size
expSize = blockSize + walSize
actRetentionCount := int(prom_testutil.ToFloat64(db.metrics.sizeRetentionCount))
actSize, err = fileutil.DirSize(db.Dir())
testutil.Ok(t, err)
testutil.Equals(t, 1, actRetentionCount, "metric retention count mismatch")
testutil.Equals(t, actSize, expSize, "metric db size doesn't match actual disk size")
testutil.Assert(t, expSize <= sizeLimit, "actual size (%v) is expected to be less than or equal to limit (%v)", expSize, sizeLimit)
testutil.Equals(t, len(blocks)-1, len(actBlocks), "new block count should be decreased from:%v to:%v", len(blocks), len(blocks)-1)
testutil.Equals(t, expBlocks[0].MaxTime, actBlocks[0].meta.MaxTime, "maxT mismatch of the first block")
testutil.Equals(t, expBlocks[len(expBlocks)-1].MaxTime, actBlocks[len(actBlocks)-1].meta.MaxTime, "maxT mismatch of the last block")
}
func TestSizeRetentionMetric(t *testing.T) {
cases := []struct {
maxBytes int64
expMaxBytes int64
}{
{maxBytes: 1000, expMaxBytes: 1000},
{maxBytes: 0, expMaxBytes: 0},
{maxBytes: -1000, expMaxBytes: 0},
}
for _, c := range cases {
db, closeFn := openTestDB(t, &Options{
MaxBytes: c.maxBytes,
}, []int64{100})
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
actMaxBytes := int64(prom_testutil.ToFloat64(db.metrics.maxBytes))
testutil.Equals(t, actMaxBytes, c.expMaxBytes, "metric retention limit bytes mismatch")
}
}
func TestNotMatcherSelectsLabelsUnsetSeries(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
labelpairs := []labels.Labels{
labels.FromStrings("a", "abcd", "b", "abcde"),
labels.FromStrings("labelname", "labelvalue"),
}
app := db.Appender()
for _, lbls := range labelpairs {
_, err := app.Add(lbls, 0, 1)
testutil.Ok(t, err)
}
testutil.Ok(t, app.Commit())
cases := []struct {
selector labels.Selector
series []labels.Labels
}{{
selector: labels.Selector{
labels.MustNewMatcher(labels.MatchNotEqual, "lname", "lvalue"),
},
series: labelpairs,
}, {
selector: labels.Selector{
labels.MustNewMatcher(labels.MatchEqual, "a", "abcd"),
labels.MustNewMatcher(labels.MatchNotEqual, "b", "abcde"),
},
series: []labels.Labels{},
}, {
selector: labels.Selector{
labels.MustNewMatcher(labels.MatchEqual, "a", "abcd"),
labels.MustNewMatcher(labels.MatchNotEqual, "b", "abc"),
},
series: []labels.Labels{labelpairs[0]},
}, {
selector: labels.Selector{
labels.MustNewMatcher(labels.MatchNotRegexp, "a", "abd.*"),
},
series: labelpairs,
}, {
selector: labels.Selector{
labels.MustNewMatcher(labels.MatchNotRegexp, "a", "abc.*"),
},
series: labelpairs[1:],
}, {
selector: labels.Selector{
labels.MustNewMatcher(labels.MatchNotRegexp, "c", "abd.*"),
},
series: labelpairs,
}, {
selector: labels.Selector{
labels.MustNewMatcher(labels.MatchNotRegexp, "labelname", "labelvalue"),
},
series: labelpairs[:1],
}}
q, err := db.Querier(context.TODO(), 0, 10)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, q.Close()) }()
for _, c := range cases {
ss, ws, err := q.Select(false, nil, c.selector...)
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
lres, _, err := expandSeriesSet(ss)
testutil.Ok(t, err)
testutil.Equals(t, c.series, lres)
}
}
// expandSeriesSet returns the raw labels in the order they are retrieved from
// the series set and the samples keyed by Labels().String().
func expandSeriesSet(ss storage.SeriesSet) ([]labels.Labels, map[string][]sample, error) {
resultLabels := []labels.Labels{}
resultSamples := map[string][]sample{}
for ss.Next() {
series := ss.At()
samples := []sample{}
it := series.Iterator()
for it.Next() {
t, v := it.At()
samples = append(samples, sample{t: t, v: v})
}
resultLabels = append(resultLabels, series.Labels())
resultSamples[series.Labels().String()] = samples
}
return resultLabels, resultSamples, ss.Err()
}
func TestOverlappingBlocksDetectsAllOverlaps(t *testing.T) {
// Create 10 blocks that does not overlap (0-10, 10-20, ..., 100-110) but in reverse order to ensure our algorithm
// will handle that.
var metas = make([]BlockMeta, 11)
for i := 10; i >= 0; i-- {
metas[i] = BlockMeta{MinTime: int64(i * 10), MaxTime: int64((i + 1) * 10)}
}
testutil.Assert(t, len(OverlappingBlocks(metas)) == 0, "we found unexpected overlaps")
// Add overlapping blocks. We've to establish order again since we aren't interested
// in trivial overlaps caused by unorderedness.
add := func(ms ...BlockMeta) []BlockMeta {
repl := append(append([]BlockMeta{}, metas...), ms...)
sort.Slice(repl, func(i, j int) bool {
return repl[i].MinTime < repl[j].MinTime
})
return repl
}
// o1 overlaps with 10-20.
o1 := BlockMeta{MinTime: 15, MaxTime: 17}
testutil.Equals(t, Overlaps{
{Min: 15, Max: 17}: {metas[1], o1},
}, OverlappingBlocks(add(o1)))
// o2 overlaps with 20-30 and 30-40.
o2 := BlockMeta{MinTime: 21, MaxTime: 31}
testutil.Equals(t, Overlaps{
{Min: 21, Max: 30}: {metas[2], o2},
{Min: 30, Max: 31}: {o2, metas[3]},
}, OverlappingBlocks(add(o2)))
// o3a and o3b overlaps with 30-40 and each other.
o3a := BlockMeta{MinTime: 33, MaxTime: 39}
o3b := BlockMeta{MinTime: 34, MaxTime: 36}
testutil.Equals(t, Overlaps{
{Min: 34, Max: 36}: {metas[3], o3a, o3b},
}, OverlappingBlocks(add(o3a, o3b)))
// o4 is 1:1 overlap with 50-60.
o4 := BlockMeta{MinTime: 50, MaxTime: 60}
testutil.Equals(t, Overlaps{
{Min: 50, Max: 60}: {metas[5], o4},
}, OverlappingBlocks(add(o4)))
// o5 overlaps with 60-70, 70-80 and 80-90.
o5 := BlockMeta{MinTime: 61, MaxTime: 85}
testutil.Equals(t, Overlaps{
{Min: 61, Max: 70}: {metas[6], o5},
{Min: 70, Max: 80}: {o5, metas[7]},
{Min: 80, Max: 85}: {o5, metas[8]},
}, OverlappingBlocks(add(o5)))
// o6a overlaps with 90-100, 100-110 and o6b, o6b overlaps with 90-100 and o6a.
o6a := BlockMeta{MinTime: 92, MaxTime: 105}
o6b := BlockMeta{MinTime: 94, MaxTime: 99}
testutil.Equals(t, Overlaps{
{Min: 94, Max: 99}: {metas[9], o6a, o6b},
{Min: 100, Max: 105}: {o6a, metas[10]},
}, OverlappingBlocks(add(o6a, o6b)))
// All together.
testutil.Equals(t, Overlaps{
{Min: 15, Max: 17}: {metas[1], o1},
{Min: 21, Max: 30}: {metas[2], o2}, {Min: 30, Max: 31}: {o2, metas[3]},
{Min: 34, Max: 36}: {metas[3], o3a, o3b},
{Min: 50, Max: 60}: {metas[5], o4},
{Min: 61, Max: 70}: {metas[6], o5}, {Min: 70, Max: 80}: {o5, metas[7]}, {Min: 80, Max: 85}: {o5, metas[8]},
{Min: 94, Max: 99}: {metas[9], o6a, o6b}, {Min: 100, Max: 105}: {o6a, metas[10]},
}, OverlappingBlocks(add(o1, o2, o3a, o3b, o4, o5, o6a, o6b)))
// Additional case.
var nc1 []BlockMeta
nc1 = append(nc1, BlockMeta{MinTime: 1, MaxTime: 5})
nc1 = append(nc1, BlockMeta{MinTime: 2, MaxTime: 3})
nc1 = append(nc1, BlockMeta{MinTime: 2, MaxTime: 3})
nc1 = append(nc1, BlockMeta{MinTime: 2, MaxTime: 3})
nc1 = append(nc1, BlockMeta{MinTime: 2, MaxTime: 3})
nc1 = append(nc1, BlockMeta{MinTime: 2, MaxTime: 6})
nc1 = append(nc1, BlockMeta{MinTime: 3, MaxTime: 5})
nc1 = append(nc1, BlockMeta{MinTime: 5, MaxTime: 7})
nc1 = append(nc1, BlockMeta{MinTime: 7, MaxTime: 10})
nc1 = append(nc1, BlockMeta{MinTime: 8, MaxTime: 9})
testutil.Equals(t, Overlaps{
{Min: 2, Max: 3}: {nc1[0], nc1[1], nc1[2], nc1[3], nc1[4], nc1[5]}, // 1-5, 2-3, 2-3, 2-3, 2-3, 2,6
{Min: 3, Max: 5}: {nc1[0], nc1[5], nc1[6]}, // 1-5, 2-6, 3-5
{Min: 5, Max: 6}: {nc1[5], nc1[7]}, // 2-6, 5-7
{Min: 8, Max: 9}: {nc1[8], nc1[9]}, // 7-10, 8-9
}, OverlappingBlocks(nc1))
}
// Regression test for https://github.com/prometheus/tsdb/issues/347
func TestChunkAtBlockBoundary(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
blockRange := db.compactor.(*LeveledCompactor).ranges[0]
label := labels.FromStrings("foo", "bar")
for i := int64(0); i < 3; i++ {
_, err := app.Add(label, i*blockRange, 0)
testutil.Ok(t, err)
_, err = app.Add(label, i*blockRange+1000, 0)
testutil.Ok(t, err)
}
err := app.Commit()
testutil.Ok(t, err)
err = db.Compact()
testutil.Ok(t, err)
for _, block := range db.Blocks() {
r, err := block.Index()
testutil.Ok(t, err)
defer r.Close()
meta := block.Meta()
k, v := index.AllPostingsKey()
p, err := r.Postings(k, v)
testutil.Ok(t, err)
var (
lset labels.Labels
chks []chunks.Meta
)
chunkCount := 0
for p.Next() {
err = r.Series(p.At(), &lset, &chks)
testutil.Ok(t, err)
for _, c := range chks {
testutil.Assert(t, meta.MinTime <= c.MinTime && c.MaxTime <= meta.MaxTime,
"chunk spans beyond block boundaries: [block.MinTime=%d, block.MaxTime=%d]; [chunk.MinTime=%d, chunk.MaxTime=%d]",
meta.MinTime, meta.MaxTime, c.MinTime, c.MaxTime)
chunkCount++
}
}
testutil.Assert(t, chunkCount == 1, "expected 1 chunk in block %s, got %d", meta.ULID, chunkCount)
}
}
func TestQuerierWithBoundaryChunks(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
app := db.Appender()
blockRange := db.compactor.(*LeveledCompactor).ranges[0]
label := labels.FromStrings("foo", "bar")
for i := int64(0); i < 5; i++ {
_, err := app.Add(label, i*blockRange, 0)
testutil.Ok(t, err)
}
err := app.Commit()
testutil.Ok(t, err)
err = db.Compact()
testutil.Ok(t, err)
testutil.Assert(t, len(db.blocks) >= 3, "invalid test, less than three blocks in DB")
q, err := db.Querier(context.TODO(), blockRange, 2*blockRange)
testutil.Ok(t, err)
defer q.Close()
// The requested interval covers 2 blocks, so the querier should contain 2 blocks.
count := len(q.(*querier).blocks)
testutil.Assert(t, count == 2, "expected 2 blocks in querier, got %d", count)
}
// TestInitializeHeadTimestamp ensures that the h.minTime is set properly.
// - no blocks no WAL: set to the time of the first appended sample
// - no blocks with WAL: set to the smallest sample from the WAL
// - with blocks no WAL: set to the last block maxT
// - with blocks with WAL: same as above
func TestInitializeHeadTimestamp(t *testing.T) {
t.Run("clean", func(t *testing.T) {
dir, err := ioutil.TempDir("", "test_head_init")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(dir))
}()
db, err := Open(dir, nil, nil, nil)
testutil.Ok(t, err)
defer db.Close()
// Should be set to init values if no WAL or blocks exist so far.
testutil.Equals(t, int64(math.MaxInt64), db.head.MinTime())
testutil.Equals(t, int64(math.MinInt64), db.head.MaxTime())
// First added sample initializes the writable range.
app := db.Appender()
_, err = app.Add(labels.FromStrings("a", "b"), 1000, 1)
testutil.Ok(t, err)
testutil.Equals(t, int64(1000), db.head.MinTime())
testutil.Equals(t, int64(1000), db.head.MaxTime())
})
t.Run("wal-only", func(t *testing.T) {
dir, err := ioutil.TempDir("", "test_head_init")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(dir))
}()
testutil.Ok(t, os.MkdirAll(path.Join(dir, "wal"), 0777))
w, err := wal.New(nil, nil, path.Join(dir, "wal"), false)
testutil.Ok(t, err)
var enc record.Encoder
err = w.Log(
enc.Series([]record.RefSeries{
{Ref: 123, Labels: labels.FromStrings("a", "1")},
{Ref: 124, Labels: labels.FromStrings("a", "2")},
}, nil),
enc.Samples([]record.RefSample{
{Ref: 123, T: 5000, V: 1},
{Ref: 124, T: 15000, V: 1},
}, nil),
)
testutil.Ok(t, err)
testutil.Ok(t, w.Close())
db, err := Open(dir, nil, nil, nil)
testutil.Ok(t, err)
defer db.Close()
testutil.Equals(t, int64(5000), db.head.MinTime())
testutil.Equals(t, int64(15000), db.head.MaxTime())
})
t.Run("existing-block", func(t *testing.T) {
dir, err := ioutil.TempDir("", "test_head_init")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(dir))
}()
createBlock(t, dir, genSeries(1, 1, 1000, 2000))
db, err := Open(dir, nil, nil, nil)
testutil.Ok(t, err)
defer db.Close()
testutil.Equals(t, int64(2000), db.head.MinTime())
testutil.Equals(t, int64(2000), db.head.MaxTime())
})
t.Run("existing-block-and-wal", func(t *testing.T) {
dir, err := ioutil.TempDir("", "test_head_init")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(dir))
}()
createBlock(t, dir, genSeries(1, 1, 1000, 6000))
testutil.Ok(t, os.MkdirAll(path.Join(dir, "wal"), 0777))
w, err := wal.New(nil, nil, path.Join(dir, "wal"), false)
testutil.Ok(t, err)
var enc record.Encoder
err = w.Log(
enc.Series([]record.RefSeries{
{Ref: 123, Labels: labels.FromStrings("a", "1")},
{Ref: 124, Labels: labels.FromStrings("a", "2")},
}, nil),
enc.Samples([]record.RefSample{
{Ref: 123, T: 5000, V: 1},
{Ref: 124, T: 15000, V: 1},
}, nil),
)
testutil.Ok(t, err)
testutil.Ok(t, w.Close())
r := prometheus.NewRegistry()
db, err := Open(dir, nil, r, nil)
testutil.Ok(t, err)
defer db.Close()
testutil.Equals(t, int64(6000), db.head.MinTime())
testutil.Equals(t, int64(15000), db.head.MaxTime())
// Check that old series has been GCed.
testutil.Equals(t, 1.0, prom_testutil.ToFloat64(db.head.metrics.series))
})
}
func TestNoEmptyBlocks(t *testing.T) {
db, closeFn := openTestDB(t, nil, []int64{100})
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
db.DisableCompactions()
rangeToTriggerCompaction := db.compactor.(*LeveledCompactor).ranges[0]/2*3 - 1
defaultLabel := labels.FromStrings("foo", "bar")
defaultMatcher := labels.MustNewMatcher(labels.MatchRegexp, "", ".*")
t.Run("Test no blocks after compact with empty head.", func(t *testing.T) {
testutil.Ok(t, db.Compact())
actBlocks, err := blockDirs(db.Dir())
testutil.Ok(t, err)
testutil.Equals(t, len(db.Blocks()), len(actBlocks))
testutil.Equals(t, 0, len(actBlocks))
testutil.Equals(t, 0, int(prom_testutil.ToFloat64(db.compactor.(*LeveledCompactor).metrics.ran)), "no compaction should be triggered here")
})
t.Run("Test no blocks after deleting all samples from head.", func(t *testing.T) {
app := db.Appender()
_, err := app.Add(defaultLabel, 1, 0)
testutil.Ok(t, err)
_, err = app.Add(defaultLabel, 2, 0)
testutil.Ok(t, err)
_, err = app.Add(defaultLabel, 3+rangeToTriggerCompaction, 0)
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
testutil.Ok(t, db.Delete(math.MinInt64, math.MaxInt64, defaultMatcher))
testutil.Ok(t, db.Compact())
testutil.Equals(t, 1, int(prom_testutil.ToFloat64(db.compactor.(*LeveledCompactor).metrics.ran)), "compaction should have been triggered here")
actBlocks, err := blockDirs(db.Dir())
testutil.Ok(t, err)
testutil.Equals(t, len(db.Blocks()), len(actBlocks))
testutil.Equals(t, 0, len(actBlocks))
app = db.Appender()
_, err = app.Add(defaultLabel, 1, 0)
testutil.Assert(t, err == storage.ErrOutOfBounds, "the head should be truncated so no samples in the past should be allowed")
// Adding new blocks.
currentTime := db.Head().MaxTime()
_, err = app.Add(defaultLabel, currentTime, 0)
testutil.Ok(t, err)
_, err = app.Add(defaultLabel, currentTime+1, 0)
testutil.Ok(t, err)
_, err = app.Add(defaultLabel, currentTime+rangeToTriggerCompaction, 0)
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
testutil.Ok(t, db.Compact())
testutil.Equals(t, 2, int(prom_testutil.ToFloat64(db.compactor.(*LeveledCompactor).metrics.ran)), "compaction should have been triggered here")
actBlocks, err = blockDirs(db.Dir())
testutil.Ok(t, err)
testutil.Equals(t, len(db.Blocks()), len(actBlocks))
testutil.Assert(t, len(actBlocks) == 1, "No blocks created when compacting with >0 samples")
})
t.Run(`When no new block is created from head, and there are some blocks on disk
compaction should not run into infinite loop (was seen during development).`, func(t *testing.T) {
oldBlocks := db.Blocks()
app := db.Appender()
currentTime := db.Head().MaxTime()
_, err := app.Add(defaultLabel, currentTime, 0)
testutil.Ok(t, err)
_, err = app.Add(defaultLabel, currentTime+1, 0)
testutil.Ok(t, err)
_, err = app.Add(defaultLabel, currentTime+rangeToTriggerCompaction, 0)
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
testutil.Ok(t, db.head.Delete(math.MinInt64, math.MaxInt64, defaultMatcher))
testutil.Ok(t, db.Compact())
testutil.Equals(t, 3, int(prom_testutil.ToFloat64(db.compactor.(*LeveledCompactor).metrics.ran)), "compaction should have been triggered here")
testutil.Equals(t, oldBlocks, db.Blocks())
})
t.Run("Test no blocks remaining after deleting all samples from disk.", func(t *testing.T) {
currentTime := db.Head().MaxTime()
blocks := []*BlockMeta{
{MinTime: currentTime, MaxTime: currentTime + db.compactor.(*LeveledCompactor).ranges[0]},
{MinTime: currentTime + 100, MaxTime: currentTime + 100 + db.compactor.(*LeveledCompactor).ranges[0]},
}
for _, m := range blocks {
createBlock(t, db.Dir(), genSeries(2, 2, m.MinTime, m.MaxTime))
}
oldBlocks := db.Blocks()
testutil.Ok(t, db.reload()) // Reload the db to register the new blocks.
testutil.Equals(t, len(blocks)+len(oldBlocks), len(db.Blocks())) // Ensure all blocks are registered.
testutil.Ok(t, db.Delete(math.MinInt64, math.MaxInt64, defaultMatcher))
testutil.Ok(t, db.Compact())
testutil.Equals(t, 5, int(prom_testutil.ToFloat64(db.compactor.(*LeveledCompactor).metrics.ran)), "compaction should have been triggered here once for each block that have tombstones")
actBlocks, err := blockDirs(db.Dir())
testutil.Ok(t, err)
testutil.Equals(t, len(db.Blocks()), len(actBlocks))
testutil.Equals(t, 1, len(actBlocks), "All samples are deleted. Only the most recent block should remain after compaction.")
})
}
func TestDB_LabelNames(t *testing.T) {
tests := []struct {
// Add 'sampleLabels1' -> Test Head -> Compact -> Test Disk ->
// -> Add 'sampleLabels2' -> Test Head+Disk
sampleLabels1 [][2]string // For checking head and disk separately.
// To test Head+Disk, sampleLabels2 should have
// at least 1 unique label name which is not in sampleLabels1.
sampleLabels2 [][2]string // // For checking head and disk together.
exp1 []string // after adding sampleLabels1.
exp2 []string // after adding sampleLabels1 and sampleLabels2.
}{
{
sampleLabels1: [][2]string{
{"name1", "1"},
{"name3", "3"},
{"name2", "2"},
},
sampleLabels2: [][2]string{
{"name4", "4"},
{"name1", "1"},
},
exp1: []string{"name1", "name2", "name3"},
exp2: []string{"name1", "name2", "name3", "name4"},
},
{
sampleLabels1: [][2]string{
{"name2", "2"},
{"name1", "1"},
{"name2", "2"},
},
sampleLabels2: [][2]string{
{"name6", "6"},
{"name0", "0"},
},
exp1: []string{"name1", "name2"},
exp2: []string{"name0", "name1", "name2", "name6"},
},
}
blockRange := int64(1000)
// Appends samples into the database.
appendSamples := func(db *DB, mint, maxt int64, sampleLabels [][2]string) {
t.Helper()
app := db.Appender()
for i := mint; i <= maxt; i++ {
for _, tuple := range sampleLabels {
label := labels.FromStrings(tuple[0], tuple[1])
_, err := app.Add(label, i*blockRange, 0)
testutil.Ok(t, err)
}
}
err := app.Commit()
testutil.Ok(t, err)
}
for _, tst := range tests {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
appendSamples(db, 0, 4, tst.sampleLabels1)
// Testing head.
headIndexr, err := db.head.Index()
testutil.Ok(t, err)
labelNames, err := headIndexr.LabelNames()
testutil.Ok(t, err)
testutil.Equals(t, tst.exp1, labelNames)
testutil.Ok(t, headIndexr.Close())
// Testing disk.
err = db.Compact()
testutil.Ok(t, err)
// All blocks have same label names, hence check them individually.
// No need to aggregate and check.
for _, b := range db.Blocks() {
blockIndexr, err := b.Index()
testutil.Ok(t, err)
labelNames, err = blockIndexr.LabelNames()
testutil.Ok(t, err)
testutil.Equals(t, tst.exp1, labelNames)
testutil.Ok(t, blockIndexr.Close())
}
// Adding more samples to head with new label names
// so that we can test (head+disk).LabelNames() (the union).
appendSamples(db, 5, 9, tst.sampleLabels2)
// Testing DB (union).
q, err := db.Querier(context.TODO(), math.MinInt64, math.MaxInt64)
testutil.Ok(t, err)
var ws storage.Warnings
labelNames, ws, err = q.LabelNames()
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
testutil.Ok(t, q.Close())
testutil.Equals(t, tst.exp2, labelNames)
}
}
func TestCorrectNumTombstones(t *testing.T) {
db, closeFn := openTestDB(t, nil, nil)
defer func() {
testutil.Ok(t, db.Close())
closeFn()
}()
blockRange := db.compactor.(*LeveledCompactor).ranges[0]
defaultLabel := labels.FromStrings("foo", "bar")
defaultMatcher := labels.MustNewMatcher(labels.MatchEqual, defaultLabel[0].Name, defaultLabel[0].Value)
app := db.Appender()
for i := int64(0); i < 3; i++ {
for j := int64(0); j < 15; j++ {
_, err := app.Add(defaultLabel, i*blockRange+j, 0)
testutil.Ok(t, err)
}
}
testutil.Ok(t, app.Commit())
err := db.Compact()
testutil.Ok(t, err)
testutil.Equals(t, 1, len(db.blocks))
testutil.Ok(t, db.Delete(0, 1, defaultMatcher))
testutil.Equals(t, uint64(1), db.blocks[0].meta.Stats.NumTombstones)
// {0, 1} and {2, 3} are merged to form 1 tombstone.
testutil.Ok(t, db.Delete(2, 3, defaultMatcher))
testutil.Equals(t, uint64(1), db.blocks[0].meta.Stats.NumTombstones)
testutil.Ok(t, db.Delete(5, 6, defaultMatcher))
testutil.Equals(t, uint64(2), db.blocks[0].meta.Stats.NumTombstones)
testutil.Ok(t, db.Delete(9, 11, defaultMatcher))
testutil.Equals(t, uint64(3), db.blocks[0].meta.Stats.NumTombstones)
}
func TestVerticalCompaction(t *testing.T) {
cases := []struct {
blockSeries [][]storage.Series
expSeries map[string][]tsdbutil.Sample
expBlockNum int
expOverlappingBlocks int
}{
// Case 0
// |--------------|
// |----------------|
{
blockSeries: [][]storage.Series{
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{7, 0}, sample{8, 0}, sample{9, 0},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{7, 99},
sample{8, 99}, sample{9, 99}, sample{10, 99}, sample{11, 99},
sample{12, 99}, sample{13, 99}, sample{14, 99},
}),
},
},
expSeries: map[string][]tsdbutil.Sample{`{a="b"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{3, 99},
sample{4, 0}, sample{5, 99}, sample{6, 99}, sample{7, 99},
sample{8, 99}, sample{9, 99}, sample{10, 99}, sample{11, 99},
sample{12, 99}, sample{13, 99}, sample{14, 99},
}},
expBlockNum: 1,
expOverlappingBlocks: 1,
},
// Case 1
// |-------------------------------|
// |----------------|
{
blockSeries: [][]storage.Series{
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{7, 0}, sample{8, 0}, sample{9, 0},
sample{11, 0}, sample{13, 0}, sample{17, 0},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{7, 99},
sample{8, 99}, sample{9, 99}, sample{10, 99},
}),
},
},
expSeries: map[string][]tsdbutil.Sample{`{a="b"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{3, 99},
sample{4, 0}, sample{5, 99}, sample{6, 99}, sample{7, 99},
sample{8, 99}, sample{9, 99}, sample{10, 99}, sample{11, 0},
sample{13, 0}, sample{17, 0},
}},
expBlockNum: 1,
expOverlappingBlocks: 1,
},
// Case 2
// |-------------------------------|
// |------------|
// |--------------------|
{
blockSeries: [][]storage.Series{
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{7, 0}, sample{8, 0}, sample{9, 0},
sample{11, 0}, sample{13, 0}, sample{17, 0},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{7, 99},
sample{8, 99}, sample{9, 99},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{14, 59}, sample{15, 59}, sample{17, 59}, sample{20, 59},
sample{21, 59}, sample{22, 59},
}),
},
},
expSeries: map[string][]tsdbutil.Sample{`{a="b"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{3, 99},
sample{4, 0}, sample{5, 99}, sample{6, 99}, sample{7, 99},
sample{8, 99}, sample{9, 99}, sample{11, 0}, sample{13, 0},
sample{14, 59}, sample{15, 59}, sample{17, 59}, sample{20, 59},
sample{21, 59}, sample{22, 59},
}},
expBlockNum: 1,
expOverlappingBlocks: 1,
},
// Case 3
// |-------------------|
// |--------------------|
// |----------------|
{
blockSeries: [][]storage.Series{
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{8, 0}, sample{9, 0},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{14, 59}, sample{15, 59}, sample{17, 59}, sample{20, 59},
sample{21, 59}, sample{22, 59},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{5, 99}, sample{6, 99}, sample{7, 99}, sample{8, 99},
sample{9, 99}, sample{10, 99}, sample{13, 99}, sample{15, 99},
sample{16, 99}, sample{17, 99},
}),
},
},
expSeries: map[string][]tsdbutil.Sample{`{a="b"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 99}, sample{6, 99}, sample{7, 99}, sample{8, 99},
sample{9, 99}, sample{10, 99}, sample{13, 99}, sample{14, 59},
sample{15, 59}, sample{16, 99}, sample{17, 59}, sample{20, 59},
sample{21, 59}, sample{22, 59},
}},
expBlockNum: 1,
expOverlappingBlocks: 1,
},
// Case 4
// |-------------------------------------|
// |------------|
// |-------------------------|
{
blockSeries: [][]storage.Series{
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{8, 0}, sample{9, 0}, sample{10, 0},
sample{13, 0}, sample{15, 0}, sample{16, 0}, sample{17, 0},
sample{20, 0}, sample{22, 0},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{7, 59}, sample{8, 59}, sample{9, 59}, sample{10, 59},
sample{11, 59},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{8, 99},
sample{9, 99}, sample{10, 99}, sample{13, 99}, sample{15, 99},
sample{16, 99}, sample{17, 99},
}),
},
},
expSeries: map[string][]tsdbutil.Sample{`{a="b"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{3, 99},
sample{4, 0}, sample{5, 99}, sample{6, 99}, sample{7, 59},
sample{8, 59}, sample{9, 59}, sample{10, 59}, sample{11, 59},
sample{13, 99}, sample{15, 99}, sample{16, 99}, sample{17, 99},
sample{20, 0}, sample{22, 0},
}},
expBlockNum: 1,
expOverlappingBlocks: 1,
},
// Case 5: series are merged properly when there are multiple series.
// |-------------------------------------|
// |------------|
// |-------------------------|
{
blockSeries: [][]storage.Series{
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{8, 0}, sample{9, 0}, sample{10, 0},
sample{13, 0}, sample{15, 0}, sample{16, 0}, sample{17, 0},
sample{20, 0}, sample{22, 0},
}),
newSeries(map[string]string{"b": "c"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{8, 0}, sample{9, 0}, sample{10, 0},
sample{13, 0}, sample{15, 0}, sample{16, 0}, sample{17, 0},
sample{20, 0}, sample{22, 0},
}),
newSeries(map[string]string{"c": "d"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{8, 0}, sample{9, 0}, sample{10, 0},
sample{13, 0}, sample{15, 0}, sample{16, 0}, sample{17, 0},
sample{20, 0}, sample{22, 0},
}),
},
{
newSeries(map[string]string{"__name__": "a"}, []tsdbutil.Sample{
sample{7, 59}, sample{8, 59}, sample{9, 59}, sample{10, 59},
sample{11, 59},
}),
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{7, 59}, sample{8, 59}, sample{9, 59}, sample{10, 59},
sample{11, 59},
}),
newSeries(map[string]string{"aa": "bb"}, []tsdbutil.Sample{
sample{7, 59}, sample{8, 59}, sample{9, 59}, sample{10, 59},
sample{11, 59},
}),
newSeries(map[string]string{"c": "d"}, []tsdbutil.Sample{
sample{7, 59}, sample{8, 59}, sample{9, 59}, sample{10, 59},
sample{11, 59},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{8, 99},
sample{9, 99}, sample{10, 99}, sample{13, 99}, sample{15, 99},
sample{16, 99}, sample{17, 99},
}),
newSeries(map[string]string{"aa": "bb"}, []tsdbutil.Sample{
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{8, 99},
sample{9, 99}, sample{10, 99}, sample{13, 99}, sample{15, 99},
sample{16, 99}, sample{17, 99},
}),
newSeries(map[string]string{"c": "d"}, []tsdbutil.Sample{
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{8, 99},
sample{9, 99}, sample{10, 99}, sample{13, 99}, sample{15, 99},
sample{16, 99}, sample{17, 99},
}),
},
},
expSeries: map[string][]tsdbutil.Sample{
`{__name__="a"}`: {
sample{7, 59}, sample{8, 59}, sample{9, 59}, sample{10, 59},
sample{11, 59},
},
`{a="b"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{3, 99},
sample{4, 0}, sample{5, 99}, sample{6, 99}, sample{7, 59},
sample{8, 59}, sample{9, 59}, sample{10, 59}, sample{11, 59},
sample{13, 99}, sample{15, 99}, sample{16, 99}, sample{17, 99},
sample{20, 0}, sample{22, 0},
},
`{aa="bb"}`: {
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{7, 59},
sample{8, 59}, sample{9, 59}, sample{10, 59}, sample{11, 59},
sample{13, 99}, sample{15, 99}, sample{16, 99}, sample{17, 99},
},
`{b="c"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{8, 0}, sample{9, 0}, sample{10, 0},
sample{13, 0}, sample{15, 0}, sample{16, 0}, sample{17, 0},
sample{20, 0}, sample{22, 0},
},
`{c="d"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{3, 99},
sample{4, 0}, sample{5, 99}, sample{6, 99}, sample{7, 59},
sample{8, 59}, sample{9, 59}, sample{10, 59}, sample{11, 59},
sample{13, 99}, sample{15, 99}, sample{16, 99}, sample{17, 99},
sample{20, 0}, sample{22, 0},
},
},
expBlockNum: 1,
expOverlappingBlocks: 1,
},
// Case 6
// |--------------|
// |----------------|
// |--------------|
// |----------------|
{
blockSeries: [][]storage.Series{
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{4, 0},
sample{5, 0}, sample{7, 0}, sample{8, 0}, sample{9, 0},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{3, 99}, sample{5, 99}, sample{6, 99}, sample{7, 99},
sample{8, 99}, sample{9, 99}, sample{10, 99}, sample{11, 99},
sample{12, 99}, sample{13, 99}, sample{14, 99},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{20, 0}, sample{21, 0}, sample{22, 0}, sample{24, 0},
sample{25, 0}, sample{27, 0}, sample{28, 0}, sample{29, 0},
}),
},
{
newSeries(map[string]string{"a": "b"}, []tsdbutil.Sample{
sample{23, 99}, sample{25, 99}, sample{26, 99}, sample{27, 99},
sample{28, 99}, sample{29, 99}, sample{30, 99}, sample{31, 99},
}),
},
},
expSeries: map[string][]tsdbutil.Sample{`{a="b"}`: {
sample{0, 0}, sample{1, 0}, sample{2, 0}, sample{3, 99},
sample{4, 0}, sample{5, 99}, sample{6, 99}, sample{7, 99},
sample{8, 99}, sample{9, 99}, sample{10, 99}, sample{11, 99},
sample{12, 99}, sample{13, 99}, sample{14, 99},
sample{20, 0}, sample{21, 0}, sample{22, 0}, sample{23, 99},
sample{24, 0}, sample{25, 99}, sample{26, 99}, sample{27, 99},
sample{28, 99}, sample{29, 99}, sample{30, 99}, sample{31, 99},
}},
expBlockNum: 2,
expOverlappingBlocks: 2,
},
}
defaultMatcher := labels.MustNewMatcher(labels.MatchRegexp, "__name__", ".*")
for _, c := range cases {
if ok := t.Run("", func(t *testing.T) {
tmpdir, err := ioutil.TempDir("", "data")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(tmpdir))
}()
for _, series := range c.blockSeries {
createBlock(t, tmpdir, series)
}
opts := DefaultOptions()
opts.AllowOverlappingBlocks = true
db, err := Open(tmpdir, nil, nil, opts)
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, db.Close())
}()
db.DisableCompactions()
testutil.Assert(t, len(db.blocks) == len(c.blockSeries), "Wrong number of blocks [before compact].")
// Vertical Query Merging test.
querier, err := db.Querier(context.TODO(), 0, 100)
testutil.Ok(t, err)
actSeries := query(t, querier, defaultMatcher)
testutil.Equals(t, c.expSeries, actSeries)
// Vertical compaction.
lc := db.compactor.(*LeveledCompactor)
testutil.Equals(t, 0, int(prom_testutil.ToFloat64(lc.metrics.overlappingBlocks)), "overlapping blocks count should be still 0 here")
err = db.Compact()
testutil.Ok(t, err)
testutil.Equals(t, c.expBlockNum, len(db.Blocks()), "Wrong number of blocks [after compact]")
testutil.Equals(t, c.expOverlappingBlocks, int(prom_testutil.ToFloat64(lc.metrics.overlappingBlocks)), "overlapping blocks count mismatch")
// Query test after merging the overlapping blocks.
querier, err = db.Querier(context.TODO(), 0, 100)
testutil.Ok(t, err)
actSeries = query(t, querier, defaultMatcher)
testutil.Equals(t, c.expSeries, actSeries)
}); !ok {
return
}
}
}
// TestBlockRanges checks the following use cases:
// - No samples can be added with timestamps lower than the last block maxt.
// - The compactor doesn't create overlapping blocks
// even when the last blocks is not within the default boundaries.
// - Lower boundary is based on the smallest sample in the head and
// upper boundary is rounded to the configured block range.
//
// This ensures that a snapshot that includes the head and creates a block with a custom time range
// will not overlap with the first block created by the next compaction.
func TestBlockRanges(t *testing.T) {
logger := log.NewLogfmtLogger(log.NewSyncWriter(os.Stderr))
dir, err := ioutil.TempDir("", "test_storage")
testutil.Ok(t, err)
// Test that the compactor doesn't create overlapping blocks
// when a non standard block already exists.
firstBlockMaxT := int64(3)
createBlock(t, dir, genSeries(1, 1, 0, firstBlockMaxT))
db, err := open(dir, logger, nil, DefaultOptions(), []int64{10000})
testutil.Ok(t, err)
rangeToTriggerCompaction := db.compactor.(*LeveledCompactor).ranges[0]/2*3 + 1
defer func() {
os.RemoveAll(dir)
}()
app := db.Appender()
lbl := labels.Labels{{Name: "a", Value: "b"}}
_, err = app.Add(lbl, firstBlockMaxT-1, rand.Float64())
if err == nil {
t.Fatalf("appending a sample with a timestamp covered by a previous block shouldn't be possible")
}
_, err = app.Add(lbl, firstBlockMaxT+1, rand.Float64())
testutil.Ok(t, err)
_, err = app.Add(lbl, firstBlockMaxT+2, rand.Float64())
testutil.Ok(t, err)
secondBlockMaxt := firstBlockMaxT + rangeToTriggerCompaction
_, err = app.Add(lbl, secondBlockMaxt, rand.Float64()) // Add samples to trigger a new compaction
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
for x := 0; x < 100; x++ {
if len(db.Blocks()) == 2 {
break
}
time.Sleep(100 * time.Millisecond)
}
testutil.Equals(t, 2, len(db.Blocks()), "no new block created after the set timeout")
if db.Blocks()[0].Meta().MaxTime > db.Blocks()[1].Meta().MinTime {
t.Fatalf("new block overlaps old:%v,new:%v", db.Blocks()[0].Meta(), db.Blocks()[1].Meta())
}
// Test that wal records are skipped when an existing block covers the same time ranges
// and compaction doesn't create an overlapping block.
db.DisableCompactions()
_, err = app.Add(lbl, secondBlockMaxt+1, rand.Float64())
testutil.Ok(t, err)
_, err = app.Add(lbl, secondBlockMaxt+2, rand.Float64())
testutil.Ok(t, err)
_, err = app.Add(lbl, secondBlockMaxt+3, rand.Float64())
testutil.Ok(t, err)
_, err = app.Add(lbl, secondBlockMaxt+4, rand.Float64())
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
testutil.Ok(t, db.Close())
thirdBlockMaxt := secondBlockMaxt + 2
createBlock(t, dir, genSeries(1, 1, secondBlockMaxt+1, thirdBlockMaxt))
db, err = open(dir, logger, nil, DefaultOptions(), []int64{10000})
testutil.Ok(t, err)
defer db.Close()
testutil.Equals(t, 3, len(db.Blocks()), "db doesn't include expected number of blocks")
testutil.Equals(t, db.Blocks()[2].Meta().MaxTime, thirdBlockMaxt, "unexpected maxt of the last block")
app = db.Appender()
_, err = app.Add(lbl, thirdBlockMaxt+rangeToTriggerCompaction, rand.Float64()) // Trigger a compaction
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
for x := 0; x < 100; x++ {
if len(db.Blocks()) == 4 {
break
}
time.Sleep(100 * time.Millisecond)
}
testutil.Equals(t, 4, len(db.Blocks()), "no new block created after the set timeout")
if db.Blocks()[2].Meta().MaxTime > db.Blocks()[3].Meta().MinTime {
t.Fatalf("new block overlaps old:%v,new:%v", db.Blocks()[2].Meta(), db.Blocks()[3].Meta())
}
}
// TestDBReadOnly ensures that opening a DB in readonly mode doesn't modify any files on the disk.
// It also checks that the API calls return equivalent results as a normal db.Open() mode.
func TestDBReadOnly(t *testing.T) {
var (
dbDir string
logger = log.NewLogfmtLogger(log.NewSyncWriter(os.Stderr))
expBlocks []*Block
expSeries map[string][]tsdbutil.Sample
expSeriesCount int
expDBHash []byte
matchAll = labels.MustNewMatcher(labels.MatchEqual, "", "")
err error
)
// Bootstrap the db.
{
dbDir, err = ioutil.TempDir("", "test")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(dbDir))
}()
dbBlocks := []*BlockMeta{
{MinTime: 10, MaxTime: 11},
{MinTime: 11, MaxTime: 12},
{MinTime: 12, MaxTime: 13},
}
for _, m := range dbBlocks {
createBlock(t, dbDir, genSeries(1, 1, m.MinTime, m.MaxTime))
}
expSeriesCount++
}
// Open a normal db to use for a comparison.
{
dbWritable, err := Open(dbDir, logger, nil, nil)
testutil.Ok(t, err)
dbWritable.DisableCompactions()
dbSizeBeforeAppend, err := fileutil.DirSize(dbWritable.Dir())
testutil.Ok(t, err)
app := dbWritable.Appender()
_, err = app.Add(labels.FromStrings("foo", "bar"), dbWritable.Head().MaxTime()+1, 0)
testutil.Ok(t, err)
testutil.Ok(t, app.Commit())
expSeriesCount++
expBlocks = dbWritable.Blocks()
expDbSize, err := fileutil.DirSize(dbWritable.Dir())
testutil.Ok(t, err)
testutil.Assert(t, expDbSize > dbSizeBeforeAppend, "db size didn't increase after an append")
q, err := dbWritable.Querier(context.TODO(), math.MinInt64, math.MaxInt64)
testutil.Ok(t, err)
expSeries = query(t, q, matchAll)
testutil.Ok(t, dbWritable.Close()) // Close here to allow getting the dir hash for windows.
expDBHash = testutil.DirHash(t, dbWritable.Dir())
}
// Open a read only db and ensure that the API returns the same result as the normal DB.
{
dbReadOnly, err := OpenDBReadOnly(dbDir, logger)
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, dbReadOnly.Close())
}()
blocks, err := dbReadOnly.Blocks()
testutil.Ok(t, err)
testutil.Equals(t, len(expBlocks), len(blocks))
for i, expBlock := range expBlocks {
testutil.Equals(t, expBlock.Meta(), blocks[i].Meta(), "block meta mismatch")
}
q, err := dbReadOnly.Querier(context.TODO(), math.MinInt64, math.MaxInt64)
testutil.Ok(t, err)
readOnlySeries := query(t, q, matchAll)
readOnlyDBHash := testutil.DirHash(t, dbDir)
testutil.Equals(t, expSeriesCount, len(readOnlySeries), "total series mismatch")
testutil.Equals(t, expSeries, readOnlySeries, "series mismatch")
testutil.Equals(t, expDBHash, readOnlyDBHash, "after all read operations the db hash should remain the same")
}
}
// TestDBReadOnlyClosing ensures that after closing the db
// all api methods return an ErrClosed.
func TestDBReadOnlyClosing(t *testing.T) {
dbDir, err := ioutil.TempDir("", "test")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(dbDir))
}()
db, err := OpenDBReadOnly(dbDir, log.NewLogfmtLogger(log.NewSyncWriter(os.Stderr)))
testutil.Ok(t, err)
testutil.Ok(t, db.Close())
testutil.Equals(t, db.Close(), ErrClosed)
_, err = db.Blocks()
testutil.Equals(t, err, ErrClosed)
_, err = db.Querier(context.TODO(), 0, 1)
testutil.Equals(t, err, ErrClosed)
}
func TestDBReadOnly_FlushWAL(t *testing.T) {
var (
dbDir string
logger = log.NewLogfmtLogger(log.NewSyncWriter(os.Stderr))
err error
maxt int
)
// Bootstrap the db.
{
dbDir, err = ioutil.TempDir("", "test")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(dbDir))
}()
// Append data to the WAL.
db, err := Open(dbDir, logger, nil, nil)
testutil.Ok(t, err)
db.DisableCompactions()
app := db.Appender()
maxt = 1000
for i := 0; i < maxt; i++ {
_, err := app.Add(labels.FromStrings(defaultLabelName, "flush"), int64(i), 1.0)
testutil.Ok(t, err)
}
testutil.Ok(t, app.Commit())
defer func() { testutil.Ok(t, db.Close()) }()
}
// Flush WAL.
db, err := OpenDBReadOnly(dbDir, logger)
testutil.Ok(t, err)
flush, err := ioutil.TempDir("", "flush")
testutil.Ok(t, err)
defer func() {
testutil.Ok(t, os.RemoveAll(flush))
}()
testutil.Ok(t, db.FlushWAL(flush))
testutil.Ok(t, db.Close())
// Reopen the DB from the flushed WAL block.
db, err = OpenDBReadOnly(flush, logger)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, db.Close()) }()
blocks, err := db.Blocks()
testutil.Ok(t, err)
testutil.Equals(t, len(blocks), 1)
querier, err := db.Querier(context.TODO(), 0, int64(maxt)-1)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, querier.Close()) }()
// Sum the values.
seriesSet, ws, err := querier.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, defaultLabelName, "flush"))
testutil.Ok(t, err)
testutil.Equals(t, 0, len(ws))
sum := 0.0
for seriesSet.Next() {
series := seriesSet.At().Iterator()
for series.Next() {
_, v := series.At()
sum += v
}
testutil.Ok(t, series.Err())
}
testutil.Ok(t, seriesSet.Err())
testutil.Equals(t, 1000.0, sum)
}
func TestDBCannotSeePartialCommits(t *testing.T) {
tmpdir, _ := ioutil.TempDir("", "test")
defer os.RemoveAll(tmpdir)
db, err := Open(tmpdir, nil, nil, nil)
testutil.Ok(t, err)
defer db.Close()
stop := make(chan struct{})
firstInsert := make(chan struct{})
// Insert data in batches.
go func() {
iter := 0
for {
app := db.Appender()
for j := 0; j < 100; j++ {
_, err := app.Add(labels.FromStrings("foo", "bar", "a", strconv.Itoa(j)), int64(iter), float64(iter))
testutil.Ok(t, err)
}
err = app.Commit()
testutil.Ok(t, err)
if iter == 0 {
close(firstInsert)
}
iter++
select {
case <-stop:
return
default:
}
}
}()
<-firstInsert
// This is a race condition, so do a few tests to tickle it.
// Usually most will fail.
inconsistencies := 0
for i := 0; i < 10; i++ {
func() {
querier, err := db.Querier(context.Background(), 0, 1000000)
testutil.Ok(t, err)
defer querier.Close()
ss, _, err := querier.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar"))
testutil.Ok(t, err)
_, seriesSet, err := expandSeriesSet(ss)
testutil.Ok(t, err)
values := map[float64]struct{}{}
for _, series := range seriesSet {
values[series[len(series)-1].v] = struct{}{}
}
if len(values) != 1 {
inconsistencies++
}
}()
}
stop <- struct{}{}
testutil.Equals(t, 0, inconsistencies, "Some queries saw inconsistent results.")
}
func TestDBQueryDoesntSeeAppendsAfterCreation(t *testing.T) {
tmpdir, _ := ioutil.TempDir("", "test")
defer os.RemoveAll(tmpdir)
db, err := Open(tmpdir, nil, nil, nil)
testutil.Ok(t, err)
defer db.Close()
querierBeforeAdd, err := db.Querier(context.Background(), 0, 1000000)
testutil.Ok(t, err)
defer querierBeforeAdd.Close()
app := db.Appender()
_, err = app.Add(labels.FromStrings("foo", "bar"), 0, 0)
testutil.Ok(t, err)
querierAfterAddButBeforeCommit, err := db.Querier(context.Background(), 0, 1000000)
testutil.Ok(t, err)
defer querierAfterAddButBeforeCommit.Close()
// None of the queriers should return anything after the Add but before the commit.
ss, _, err := querierBeforeAdd.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar"))
testutil.Ok(t, err)
_, seriesSet, err := expandSeriesSet(ss)
testutil.Ok(t, err)
testutil.Equals(t, map[string][]sample{}, seriesSet)
ss, _, err = querierAfterAddButBeforeCommit.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar"))
testutil.Ok(t, err)
_, seriesSet, err = expandSeriesSet(ss)
testutil.Ok(t, err)
testutil.Equals(t, map[string][]sample{}, seriesSet)
// This commit is after the queriers are created, so should not be returned.
err = app.Commit()
testutil.Ok(t, err)
// Nothing returned for querier created before the Add.
ss, _, err = querierBeforeAdd.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar"))
testutil.Ok(t, err)
_, seriesSet, err = expandSeriesSet(ss)
testutil.Ok(t, err)
testutil.Equals(t, map[string][]sample{}, seriesSet)
// Series exists but has no samples for querier created after Add.
ss, _, err = querierAfterAddButBeforeCommit.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar"))
testutil.Ok(t, err)
_, seriesSet, err = expandSeriesSet(ss)
testutil.Ok(t, err)
testutil.Equals(t, map[string][]sample{`{foo="bar"}`: {}}, seriesSet)
querierAfterCommit, err := db.Querier(context.Background(), 0, 1000000)
testutil.Ok(t, err)
defer querierAfterCommit.Close()
// Samples are returned for querier created after Commit.
ss, _, err = querierAfterCommit.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "foo", "bar"))
testutil.Ok(t, err)
_, seriesSet, err = expandSeriesSet(ss)
testutil.Ok(t, err)
testutil.Equals(t, map[string][]sample{`{foo="bar"}`: {{t: 0, v: 0}}}, seriesSet)
}
// TestChunkWriter_ReadAfterWrite ensures that chunk segment are cut at the set segment size and
// that the resulted segments includes the expected chunks data.
func TestChunkWriter_ReadAfterWrite(t *testing.T) {
chk1 := tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 1}})
chk2 := tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 2}})
chk3 := tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 3}})
chk4 := tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 4}})
chk5 := tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 5}})
chunkSize := len(chk1.Chunk.Bytes()) + chunks.MaxChunkLengthFieldSize + chunks.ChunkEncodingSize + crc32.Size
tests := []struct {
chks [][]chunks.Meta
segmentSize,
expSegmentsCount int
expSegmentSizes []int
}{
// 0:Last chunk ends at the segment boundary so
// all chunks should fit in a single segment.
{
chks: [][]chunks.Meta{
{
chk1,
chk2,
chk3,
},
},
segmentSize: 3 * chunkSize,
expSegmentSizes: []int{3 * chunkSize},
expSegmentsCount: 1,
},
// 1:Two chunks can fit in a single segment so the last one should result in a new segment.
{
chks: [][]chunks.Meta{
{
chk1,
chk2,
chk3,
chk4,
chk5,
},
},
segmentSize: 2 * chunkSize,
expSegmentSizes: []int{2 * chunkSize, 2 * chunkSize, chunkSize},
expSegmentsCount: 3,
},
// 2:When the segment size is smaller than the size of 2 chunks
// the last segment should still create a new segment.
{
chks: [][]chunks.Meta{
{
chk1,
chk2,
chk3,
},
},
segmentSize: 2*chunkSize - 1,
expSegmentSizes: []int{chunkSize, chunkSize, chunkSize},
expSegmentsCount: 3,
},
// 3:When the segment is smaller than a single chunk
// it should still be written by ignoring the max segment size.
{
chks: [][]chunks.Meta{
{
chk1,
},
},
segmentSize: chunkSize - 1,
expSegmentSizes: []int{chunkSize},
expSegmentsCount: 1,
},
// 4:All chunks are bigger than the max segment size, but
// these should still be written even when this will result in bigger segment than the set size.
// Each segment will hold a single chunk.
{
chks: [][]chunks.Meta{
{
chk1,
chk2,
chk3,
},
},
segmentSize: 1,
expSegmentSizes: []int{chunkSize, chunkSize, chunkSize},
expSegmentsCount: 3,
},
// 5:Adding multiple batches of chunks.
{
chks: [][]chunks.Meta{
{
chk1,
chk2,
chk3,
},
{
chk4,
chk5,
},
},
segmentSize: 3 * chunkSize,
expSegmentSizes: []int{3 * chunkSize, 2 * chunkSize},
expSegmentsCount: 2,
},
// 6:Adding multiple batches of chunks.
{
chks: [][]chunks.Meta{
{
chk1,
},
{
chk2,
chk3,
},
{
chk4,
},
},
segmentSize: 2 * chunkSize,
expSegmentSizes: []int{2 * chunkSize, 2 * chunkSize},
expSegmentsCount: 2,
},
}
for i, test := range tests {
t.Run(strconv.Itoa(i), func(t *testing.T) {
tempDir, err := ioutil.TempDir("", "test_chunk_writer")
testutil.Ok(t, err)
defer func() { testutil.Ok(t, os.RemoveAll(tempDir)) }()
chunkw, err := chunks.NewWriterWithSegSize(tempDir, chunks.SegmentHeaderSize+int64(test.segmentSize))
testutil.Ok(t, err)
for _, chks := range test.chks {
testutil.Ok(t, chunkw.WriteChunks(chks...))
}
testutil.Ok(t, chunkw.Close())
files, err := ioutil.ReadDir(tempDir)
testutil.Ok(t, err)
testutil.Equals(t, test.expSegmentsCount, len(files), "expected segments count mismatch")
// Verify that all data is written to the segments.
sizeExp := 0
sizeAct := 0
for _, chks := range test.chks {
for _, chk := range chks {
l := make([]byte, binary.MaxVarintLen32)
sizeExp += binary.PutUvarint(l, uint64(len(chk.Chunk.Bytes()))) // The length field.
sizeExp += chunks.ChunkEncodingSize
sizeExp += len(chk.Chunk.Bytes()) // The data itself.
sizeExp += crc32.Size // The 4 bytes of crc32
}
}
sizeExp += test.expSegmentsCount * chunks.SegmentHeaderSize // The segment header bytes.
for i, f := range files {
size := int(f.Size())
// Verify that the segment is the same or smaller than the expected size.
testutil.Assert(t, chunks.SegmentHeaderSize+test.expSegmentSizes[i] >= size, "Segment:%v should NOT be bigger than:%v actual:%v", i, chunks.SegmentHeaderSize+test.expSegmentSizes[i], size)
sizeAct += size
}
testutil.Equals(t, sizeExp, sizeAct)
// Check the content of the chunks.
r, err := chunks.NewDirReader(tempDir, nil)
testutil.Ok(t, err)
defer func() { testutil.Ok(t, r.Close()) }()
for _, chks := range test.chks {
for _, chkExp := range chks {
chkAct, err := r.Chunk(chkExp.Ref)
testutil.Ok(t, err)
testutil.Equals(t, chkExp.Chunk.Bytes(), chkAct.Bytes())
}
}
})
}
}
// TestChunkReader_ConcurrentReads checks that the chunk result can be read concurrently.
// Regression test for https://github.com/prometheus/prometheus/pull/6514.
func TestChunkReader_ConcurrentReads(t *testing.T) {
chks := []chunks.Meta{
tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 1}}),
tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 2}}),
tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 3}}),
tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 4}}),
tsdbutil.ChunkFromSamples([]tsdbutil.Sample{sample{1, 5}}),
}
tempDir, err := ioutil.TempDir("", "test_chunk_writer")
testutil.Ok(t, err)
defer func() { testutil.Ok(t, os.RemoveAll(tempDir)) }()
chunkw, err := chunks.NewWriter(tempDir)
testutil.Ok(t, err)
testutil.Ok(t, chunkw.WriteChunks(chks...))
testutil.Ok(t, chunkw.Close())
r, err := chunks.NewDirReader(tempDir, nil)
testutil.Ok(t, err)
var wg sync.WaitGroup
for _, chk := range chks {
for i := 0; i < 100; i++ {
wg.Add(1)
go func(chunk chunks.Meta) {
defer wg.Done()
chkAct, err := r.Chunk(chunk.Ref)
testutil.Ok(t, err)
testutil.Equals(t, chunk.Chunk.Bytes(), chkAct.Bytes())
}(chk)
}
wg.Wait()
}
testutil.Ok(t, r.Close())
}
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