prometheus/tools/pruner/main.go

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// Copyright 2013 Prometheus Team
// 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.
// Pruner is responsible for cleaning all Prometheus disk databases, which
// minimally includes 1. applying pending commit logs, 2. compacting SSTables,
// 3. purging stale SSTables, and 4. removing old tombstones.
package main
import (
"flag"
"github.com/prometheus/prometheus/storage/metric"
"log"
"time"
)
var (
storageRoot = flag.String("storage.root", "", "The path to the storage root for Prometheus.")
)
func main() {
flag.Parse()
if storageRoot == nil || *storageRoot == "" {
log.Fatal("Must provide a path...")
}
persistences, err := metric.NewLevelDBMetricPersistence(*storageRoot)
if err != nil {
log.Fatal(err)
}
defer persistences.Close()
start := time.Now()
log.Printf("Starting compaction...")
size, _ := persistences.ApproximateSizes()
log.Printf("Original Size: %d", size)
persistences.CompactKeyspaces()
log.Printf("Finished in %s", time.Since(start))
size, _ = persistences.ApproximateSizes()
log.Printf("New Size: %d", size)
}