* fix: try to reproduce the bug from https://github.com/prometheus/prometheus/issues/13979 in a test case
Signed-off-by: David Vavra <sevenood@gmail.com>
* fix: data corruption in remote write if max_sample_age is applied
Signed-off-by: David Vavra <sevenood@gmail.com>
* add benchmark for buildTimeSeries which does the filtering
Signed-off-by: Callum Styan <callumstyan@gmail.com>
---------
Signed-off-by: David Vavra <sevenood@gmail.com>
Signed-off-by: Callum Styan <callumstyan@gmail.com>
Co-authored-by: David Vavra <sevenood@gmail.com>
Co-authored-by: Callum Styan <callumstyan@gmail.com>
* storage/remote: disable resharding during active retry backoffs
Today, remote_write reshards based on pure throughput. This is
problematic if throughput has been diminished because of HTTP 429s;
increasing the number of shards due to backpressure will only exacerbate
the problem.
This commit disables resharding for twice the retry backoff, ensuring
that resharding will never occur during an active backoff, and that
resharding does not become enabled again until enough time has elapsed
to allow any pending requests to be retried.
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* storage/remote: test that resharding is disabled on retry
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* storage/remote: address review feedback
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* storage/remote: track time where resharding initially got disabled
This change introduces a second atomic int64 to roughly track when
resharding got disabled. This int64 is only updated after updating the
disabled timestamp if resharding was previously enabled.
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
---------
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
On the incoming path, `writeHandler.write()` creates a new table for
each request.
`labelProtosToLabels` takes a `ScratchBuilder` now.
Call `NewScratchBuilder` as required in tests.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
One was silently doing nothing; one was doing something but the work
didn't go up linearly with iteration count.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
Relabeling can take a pre-populated `Builder` instead of making a new
one every time. This is much more efficient.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
* Drop old inmemory samples
Co-authored-by: Paschalis Tsilias <paschalis.tsilias@grafana.com>
Signed-off-by: Paschalis Tsilias <paschalis.tsilias@grafana.com>
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
* Avoid copying timeseries when the feature is disabled
Signed-off-by: Paschalis Tsilias <paschalis.tsilias@grafana.com>
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
* Run gofmt
Signed-off-by: Paschalis Tsilias <paschalis.tsilias@grafana.com>
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
* Clarify docs
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
* Add more logging info
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
* Remove loggers
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
* optimize function and add tests
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
* Simplify filter
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
* rename var
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
* Update help info from metrics
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
* use metrics to keep track of drop elements during buildWriteRequest
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
* rename var in tests
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
* pass time.Now as parameter
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
* Change buildwriterequest during retries
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
* Revert "Remove loggers"
This reverts commit 54f91dfcae20488944162335ab4ad8be459df1ab.
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
* use log level debug for loggers
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
* Fix linter
Signed-off-by: Paschalis Tsilias <paschalis.tsilias@grafana.com>
* Remove noisy debug-level logs; add 'reason' label to drop metrics
Signed-off-by: Paschalis Tsilias <paschalis.tsilias@grafana.com>
* Remove accidentally committed files
Signed-off-by: Paschalis Tsilias <paschalis.tsilias@grafana.com>
* Propagate logger to buildWriteRequest to log dropped data
Signed-off-by: Paschalis Tsilias <paschalis.tsilias@grafana.com>
* Fix docs comment
Signed-off-by: Paschalis Tsilias <paschalis.tsilias@grafana.com>
* Make drop reason more specific
Signed-off-by: Paschalis Tsilias <paschalis.tsilias@grafana.com>
* Remove unnecessary pass of logger
Signed-off-by: Paschalis Tsilias <paschalis.tsilias@grafana.com>
* Use snake_case for reason label
Signed-off-by: Paschalis Tsilias <paschalis.tsilias@grafana.com>
* Fix dropped samples metric
Signed-off-by: Paschalis Tsilias <paschalis.tsilias@grafana.com>
---------
Signed-off-by: Paschalis Tsilias <paschalis.tsilias@grafana.com>
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
Signed-off-by: Paschalis Tsilias <tpaschalis@users.noreply.github.com>
Co-authored-by: Paschalis Tsilias <paschalis.tsilias@grafana.com>
Co-authored-by: Paschalis Tsilias <tpaschalis@users.noreply.github.com>
They are used in multiple repos, so common is a better place for them.
Several packages now don't depend on `model/textparse`, e.g.
`storage/remote`.
Also remove `metadata` struct from `api.go`, since it was identical to
a struct in the `metadata` package.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
The 'ToFloat' method on integer histograms currently allocates new memory
each time it is called.
This commit adds an optional *FloatHistogram parameter that can be used
to reuse span and bucket slices. It is up to the caller to make sure the
input float histogram is not used anymore after the call.
Signed-off-by: Filip Petkovski <filip.petkovsky@gmail.com>
Header name is `Retry-Attempt`, only set when >0.
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
Signed-off-by: Paschalis Tsilias <paschalis.tsilias@grafana.com>
We haven't updated golint-ci in our CI yet, but this commit prepares
for that.
There are a lot of new warnings, and it is mostly because the "revive"
linter got updated. I agree with most of the new warnings, mostly
around not naming unused function parameters (although it is justified
in some cases for documentation purposes – while things like mocks are
a good example where not naming the parameter is clearer).
I'm pretty upset about the "empty block" warning to include `for`
loops. It's such a common pattern to do something in the head of the
`for` loop and then have an empty block. There is still an open issue
about this: https://github.com/mgechev/revive/issues/810 I have
disabled "revive" altogether in files where empty blocks are used
excessively, and I have made the effort to add individual
`// nolint:revive` where empty blocks are used just once or twice.
It's borderline noisy, though, but let's go with it for now.
I should mention that none of the "empty block" warnings for `for`
loop bodies were legitimate.
Signed-off-by: beorn7 <beorn@grafana.com>
* adapt code.go and write_handler.go to support float histograms
* adapt watcher.go to support float histograms
* wip adapt queue_manager.go to support float histograms
* address comments for metrics in queue_manager.go
* set test cases for queue manager
* use same counts for histograms and float histograms
* refactor createHistograms tests
* fix float histograms ref in watcher_test.go
* address PR comments
Signed-off-by: Marc Tuduri <marctc@protonmail.com>
The wlog.WL type can now be used to create a Write Ahead Log or a Write
Behind Log.
Before the prefix for wbl metrics was
'prometheus_tsdb_out_of_order_wal_' and has been replaced with
'prometheus_tsdb_out_of_order_wbl_'.
Signed-off-by: Jesus Vazquez <jesus.vazquez@grafana.com>
Signed-off-by: Jesus Vazquez <jesusvazquez@users.noreply.github.com>
Co-authored-by: Ganesh Vernekar <15064823+codesome@users.noreply.github.com>
And a few cases of `EmptyLabels()`.
Replacing code which assumes the internal structure of `Labels`.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
* Removing global state modification on unit tests (fix#10033#10034)
The config.DefaultRemoteReadConfig and config.DefaultRemoteWriteConfig
instances hold global state. Unit tests were changing their url.URL reference
globally causing false positives when tests were ran through package.
Two helper functions were created to copy those global values instead of changing
them in place to fix null point when running unit tests by method instead of
by package.
Signed-off-by: Leonardo Zamariola <leonardo.zamariola@gmail.com>
* Fixing pull request suggestions
Copying by value from default config
Signed-off-by: Leonardo Zamariola <leonardo.zamariola@gmail.com>
* refactor: move from io/ioutil to io and os packages
* use fs.DirEntry instead of os.FileInfo after os.ReadDir
Signed-off-by: MOREL Matthieu <matthieu.morel@cnp.fr>
If FlushAndShutdown is called with a full batchQueue, and then Batch is
called rather than the normal path of reading from a queue a deadlock
might be encountered. Rather than having FlushAndShutdown having
blocking code while holding a lock retry sending the batch every second.
Signed-off-by: Chris Marchbanks <csmarchbanks@gmail.com>
If a queue is stopped and one of its shards happens to hit the
batch_send_deadline at the same time a deadlock can occur where stop
holds the mutex and will not release it until the send is finished, but
the send needs the mutex to retrieve the most recent batch. This is
fixed by using a second mutex just for writing.
In addition, the test I wrote exposed a case where during shutdown a
batch could be sent twice due to concurrent calls to queue.Batch() and
queue.FlushAndShutdown(). Protect these with a mutex as well.
Signed-off-by: Chris Marchbanks <csmarchbanks@gmail.com>
Previously we would reject an increase from 2 to 2.5 as being
within 30%; by rounding up first we see this as an increase from 2 to 3.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
Change the coefficient from 1% to 5%, so instead of targetting to clear
the backlog in 100s we target 20s.
Update unit test to reflect the new behaviour.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
Previously BenchmarkSampleDelivery spent a lot of effort checking each
sample had arrived, so was largely showing the performance of test-only
code.
Increase the number of shards to be more realistic for a large
workload.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
This creates a new `model` directory and moves all data-model related
packages over there:
exemplar labels relabel rulefmt textparse timestamp value
All the others are more or less utilities and have been moved to `util`:
gate logging modetimevfs pool runtime
Signed-off-by: beorn7 <beorn@grafana.com>
* TSDB: demistify seriesRefs and ChunkRefs
The TSDB package contains many types of series and chunk references,
all shrouded in uint types. Often the same uint value may
actually mean one of different types, in non-obvious ways.
This PR aims to clarify the code and help navigating to relevant docs,
usage, etc much quicker.
Concretely:
* Use appropriately named types and document their semantics and
relations.
* Make multiplexing and demuxing of types explicit
(on the boundaries between concrete implementations and generic
interfaces).
* Casting between different types should be free. None of the changes
should have any impact on how the code runs.
TODO: Implement BlockSeriesRef where appropriate (for a future PR)
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* feedback
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* agent: demistify seriesRefs and ChunkRefs
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* Refactor: pass segment-reading function as param
To allow a different implementation to be used when garbage-collecting.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
* remote_write: reduce blocking from GC of series
Add a method `UpdateSeriesSegment()` which is used together with
`SeriesReset()` to garbage-collect old series. This allows us to
split the lock around queueManager series data and avoid blocking
`Append()` while reading series from the last checkpoint.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
* Cosmetic: review feedback on comments
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
* remote-write benchmark: include GC of series
Reduce the total number of samples per iteration from 5000*5000
(25 million) which is too big for my laptop, to 1*10000.
Extend `createTimeseries()` to add additional labels, so that the
queue manager is doing more realistic work.
Move the Append() call to a background goroutine - this works because
TestWriteClient uses a WaitGroup to signal completion.
Call `StoreSeries()` and `SeriesReset()` while adding samples, to
simulate the garbage-collection that wal.Watcher does.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
* Change BenchmarkSampleDelivery to call UpdateSeriesSegment
This matches what Watcher.garbageCollectSeries() is doing now
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
