* refactor block size calculation
The block size is kept in memory and not in the meta file anymore.
It now includes the size of the meta file itself for a more
correct block size.
It fixes a bug where the size didn't change when calling `block.Delete()`.
Adds a dedicated test to ensure correct block sizes.
This allows opening a db in a read only mode as it doesn't write to the meta file anymore.
Signed-off-by: Krasi Georgiev <8903888+krasi-georgiev@users.noreply.github.com>
In running Prometheus instances, compressing the records was shown to
reduce disk usage by half while incurring a negligible CPU cost.
Signed-off-by: Chris Marchbanks <csmarchbanks@gmail.com>
* Add unittests for PostingsForMatcher.
* Selector methods are all stateless, don't need a reference.
* Be smarter in how we look at matchers.
Look at all matchers to see if a label can be empty.
Optimise Not handling, so i!="2" is a simple lookup
rather than an inverse postings list.
All all the Withouts together, rather than
having to subtract each from all postings.
Change the pre-expand the postings logic to always do it before doing a
Without only. Don't do that if it's already a list.
The initial goal here was that the oft-seen pattern
i=~"something.+",i!="foo",i!="bar" becomes more efficient.
benchmark old ns/op new ns/op delta
BenchmarkHeadPostingForMatchers/n="1"-4 5888 6160 +4.62%
BenchmarkHeadPostingForMatchers/n="1",j="foo"-4 7190 6640 -7.65%
BenchmarkHeadPostingForMatchers/j="foo",n="1"-4 6038 5923 -1.90%
BenchmarkHeadPostingForMatchers/n="1",j!="foo"-4 6030884 4850525 -19.57%
BenchmarkHeadPostingForMatchers/i=~".*"-4 887377940 230329137 -74.04%
BenchmarkHeadPostingForMatchers/i=~".+"-4 490316101 319931758 -34.75%
BenchmarkHeadPostingForMatchers/i=~""-4 594961991 130279313 -78.10%
BenchmarkHeadPostingForMatchers/i!=""-4 537542388 318751015 -40.70%
BenchmarkHeadPostingForMatchers/n="1",i=~".*",j="foo"-4 10460243 8565195 -18.12%
BenchmarkHeadPostingForMatchers/n="1",i=~".*",i!="2",j="foo"-4 44964267 8561546 -80.96%
BenchmarkHeadPostingForMatchers/n="1",i!="",j="foo"-4 42244885 29137737 -31.03%
BenchmarkHeadPostingForMatchers/n="1",i=~".+",j="foo"-4 35285834 32774584 -7.12%
BenchmarkHeadPostingForMatchers/n="1",i=~"1.+",j="foo"-4 8951047 8379024 -6.39%
BenchmarkHeadPostingForMatchers/n="1",i=~".+",i!="2",j="foo"-4 63813335 30672688 -51.93%
BenchmarkHeadPostingForMatchers/n="1",i=~".+",i!~"2.*",j="foo"-4 45381112 44924397 -1.01%
Signed-off-by: Brian Brazil <brian.brazil@robustperception.io>
since golang 1.12 no special handling is required for file.Sync()
@pborzenkov thanks for the pointer.
Signed-off-by: Krasi Georgiev <kgeorgie@redhat.com>
Added methods needed to retain data based on a byte limitation rather than time. Limitation is only applied if the flag is set (defaults to 0). Both blocks that are older than the retention period and the blocks that make the size of the storage too large are removed.
2 new metrics for keeping track of the size of the local storage folder and the amount of times data has been deleted because the size restriction was exceeded.
Signed-off-by: Mark Knapp <mknapp@hudson-trading.com>
The WALFlushInterval is not used anywhere in the code base.
The WAL is not an interface anymore to save some lookup time so can't use NopWAL in the tests. Instead can just pass nil as the code checks for that and it is essentially a noop.
Signed-off-by: Krasi Georgiev <kgeorgie@redhat.com>
This reports the cardinality of each label,
the total number of label pairs,
and how much series worth of time is "uncovered"
by series data. Which is basically how much churn there is.
Signed-off-by: Brian Brazil <brian.brazil@robustperception.io>
* refactor NewSegmentsRangeReader to take multi WAL ranges
In case of an error when checkpointing the WAL the error doesn't show
the exact WAL index that is corrupter. this is because it uses
MultiReader to read multiply WAL files.
This refactoring allows the NewSegmentsRangeReader to take more than a
single WAL range and it reads all of the ranges by iterating each one.
this changes the logs from
create checkpoint: read segments: corruption after 4841144384 bytes:...
to
create checkpoint: read segments: corruption in segment
data/wal/00017351 at 123142208: ...
Signed-off-by: Krasi Georgiev <kgeorgie@redhat.com>
Krasi Georgiev
Chris Marchbanks
Krasi Georgiev
Goutham Veeramachaneni
Brian Brazil
naivewong
Pavel Borzenkov
Vishnunarayan K I
zhulongcheng
Ganesh Vernekar
Krasi Georgiev
Callum Styan
mknapphrt
glutamatt