prometheus

Commit Graph

Author	SHA1	Message	Date
beorn7	9ecf93526d	Sync the checkpoints. Because that's what should be done with checkpoints.	10 years ago
beorn7	853f971540	Actually use double-delta encoding for transcoding. :-o	10 years ago
beorn7	23ba8a5516	Make floats exact again. This should do the right thing for the old delta chunks, too.	10 years ago
beorn7	a8d4f8af9a	Improve minor things after review. The problem of float precision will be addressed in the next commit.	10 years ago
beorn7	13fcf1ddbc	Implement double-delta encoded chunks.	10 years ago
beorn7	5ed8f6c205	Update persistQueueLength after chunks were persisted.	10 years ago
beorn7	0167083da6	Improvements after review.	10 years ago
beorn7	ebac14eff3	Add version guard to persistence.	10 years ago
Julius Volz	795704f0df	Merge pull request #565 from fabxc/fabxc/labelmatcher_test Tests for retrieving fingerprints for label matchers added.	10 years ago
Fabian Reinartz	4bff5d29bf	Add tests for retrieving fingerprints for label matchers. This checks for the basic behaviour of GetFingerprintsForLabelMatchers, that is, whether the different matcher types filter the correct fingerprints and intersections are correct.	10 years ago
beorn7	92991026bb	Fix chunkDescsTotal count in case of errors. Only increment the counter if we actually add the memory series to the fingerprintToSeries map.	10 years ago
beorn7	1db7589081	Reduce the capacity of countPersistedHeadChunks. The capacity is basically how many persisted head chunks we will count at most while doing other things, in particular checkpointing. To limit the amount of already counted head chunks, keep this number low, otherwise we will easily checkpoint too often if checkpoints take long anyway.	10 years ago
beorn7	9406afad72	Do not double-count non-persisted head chunks on loading.	10 years ago
beorn7	dbc22b972c	Check last time in head chunk for head chunk timeout, not first.	10 years ago
beorn7	edd716e63c	Fix the embarrassing bug introduced in commit `0851945`. In that commit, the 'maintainSeries' call was accidentally removed. This commit refactors things a bit so that there is now a clean 'maintainMemorySeries' and a 'maintainArchivedSeries' call. Straighten the nomenclature a bit (consistently use 'drop' for chunks and 'purge' for series/metrics). Remove the annoying 'Completed maintenance sweep through archived fingerprints' message if there were no archived fingerprints to do maintenance on.	10 years ago
beorn7	af91fb8e31	Improve persisting chunks to disk. This is done by bucketing chunks by fingerprint. If the persisting to disk falls behind, more and more chunks are in the queue. As soon as there are "double hits", we will now persist both chunks in one go, doubling the disk throughput (assuming it is limited by disk seeks). Should even more pile up so that we end wit "triple hits", we will persist those first, and so on. Even if we have millions of time series, this will still help, assuming not all of them are growing with the same speed. Series that get many samples and/or are not very compressable will accumulate chunks faster, and they will soon get double- or triple-writes. To improve the chance of double writes, -storage.local.persistence-queue-capacity could be set to a higher value. However, that will slow down shutdown a lot (as the queue has to be worked through). So we leave it to the user to set it to a really high value. A more fundamental solution would be to checkpoint not only head chunks, but also chunks still in the persist queue. That would be quite complicated for a rather limited use-case (running many time series with high ingestion rate on slow spinning disks).	10 years ago
beorn7	e22f26bc58	Move to a queue model for appending samples after all. Starting a goroutine takes 1-2µs on my laptop. From the "numbers every Go programmer should know", I had 300ns for a channel send in my mind. Turns out, on my laptop, it takes only 60ns. That's fast enough to warrant the machinery of yet another channel with a fixed set of worker goroutines feeding from it. The number chosen (8 for now) is low enough to not really afflict a measurable overhead (a big Prometheus server has >1000 goroutines running), but high enough to not make sample ingestion a bottleneck.	10 years ago
beorn7	fe518fdb28	Simplify AppendSamples by allowing it to be goroutine-unsafe.	10 years ago
beorn7	8a1c195b54	Move emptiness check to the receivers.	10 years ago
beorn7	5d3cd65a5d	Improve performance of ingestion. - Parallelize AppendSamples as much as possible without breaking the contract about temporal order. - Allocate more fingerprint locker slots. - Do not run early checkpoints if we are behind on chunk persistence. - Increase fpMinWaitDuration to give the disk more time for more important things. Also, switch math.MaxInt64 and math.MinInt64 to the new constants.	10 years ago
beorn7	d2ab49c396	Make the persist queue length configurable. Also, set a much higher default value. Chunk persist requests can be quite spiky. If you collect a large number of time series that are very similar, they will tend to finish up a chunk at about the same time. There is no reason we need to back up scraping just because of that. The rationale of the new default value is "1/8 of the chunks in memory".	10 years ago
Julius Volz	9412b296d5	Remove labels on persist error counter. This fixes https://github.com/prometheus/prometheus/issues/496	10 years ago
Bjoern Rabenstein	3948e2a7f8	Move lost files to an "orphaned" directory. Previously, those were simply deleted. The orphaned files can now be used for forensics if needed.	10 years ago
Bjoern Rabenstein	c24bfdf701	Move crash related code into separate file. persistence.go is way too long anyway, and a lot of code is just crash recovery, which is not important to understand the normal operation. Also, remove unused `exists` function.	10 years ago
Bjoern Rabenstein	ab386d1f5d	Declare storage.local.index-cache-size.* default values as tweaked.	10 years ago
Bjoern Rabenstein	73f6dc4d44	Make KeyValueStore.Delete report if the key to delete was found. Previously, it would return an error instead. Now we can distinguish the cases 'error while deleting known key' vs. 'key not in index' without testing for leveldb-internal kinds of errors.	10 years ago
Bjoern Rabenstein	2c8d324ca4	Remove check that did not check anything.	10 years ago
Julius Volz	d4374a9265	More efficient JSON query result format. This depends on https://github.com/prometheus/client_golang/pull/51. For vectors, the result format looks like this: ```json { "version": 1, "type" : "vector", "value" : [ { "timestamp" : 1421765411.045, "value" : "65.475000", "metric" : { "quantile" : "0.5", "instance" : "http://localhost:9090/metrics", "job" : "prometheus", "__name__" : "http_request_duration_microseconds", "handler" : "/static/", "method" : "get", "code" : "304" } }, { "timestamp" : 1421765411.045, "value" : "5826.339000", "metric" : { "quantile" : "0.9", "instance" : "http://localhost:9090/metrics", "job" : "prometheus", "__name__" : "http_request_duration_microseconds", "handler" : "prometheus", "method" : "get", "code" : "200" } }, /* ... / ] } ``` For matrices, it looks like this: ```json { "version": 1, "type" : "matrix", "value" : [ { "metric" : { "quantile" : "0.99", "instance" : "http://localhost:9090/metrics", "job" : "prometheus", "__name__" : "http_request_duration_microseconds", "handler" : "/static/", "method" : "get", "code" : "200" }, "values" : [ [ 1421765547.659, "29162.953000" ], [ 1421765548.659, "29162.953000" ], [ 1421765549.659, "29162.953000" ], / ... */ ] } ] } ```	10 years ago
Bjoern Rabenstein	2c8fdcbc23	Remove a deadlock during shutdown. If queries are still running when the shutdown is initiated, they will finish _during_ the shutdown. In that case, they might request chunk eviction upon unpinning their pinned chunks. That might completely fill the evict request queue _after_ draining it during storage shutdown. If that ever happens (which is the case if there are _many_ queries still running during shutdown), the affected queries will be stuck while keeping a fingerprint locked. The checkpointing can then not process that fingerprint (or one that shares the same lock). And then we are deadlocked.	10 years ago
Bjoern Rabenstein	5859b74f1b	Clean up license issues. - Move CONTRIBUTORS.md to the more common AUTHORS. - Added the required NOTICE file. - Changed "Prometheus Team" to "The Prometheus Authors". - Reverted the erroneous changes to the Apache License.	10 years ago
Bjoern Rabenstein	f298af5756	Use named returns in flock.New.	10 years ago
Bjoern Rabenstein	baca6faa1c	Add double-start protection. This mimics the locking leveldb is performing anyway. Advantages of doing it separately: - Should we ever replace the leveldb implementation by one without double-start protection, we are still good. - In contrast to leveldb, the new code creates a meaningful error message.	10 years ago
Bjoern Rabenstein	ae70eac97d	Adjust the partitioning by outcome.	10 years ago
Julius Volz	a6bc42bc61	Minor formatting/spelling fixups.	10 years ago
Bjoern Rabenstein	0851945054	Add a heuristics to checkpoint early if there are many "dirty" series..	10 years ago
Bjoern Rabenstein	622e8350cd	Fix a bug handling freshly unarchived series. Usually, if you unarchive a series, it is to add something to it, which will create a new head chunk. However, if a series in unarchived, and before anything is added to it, it is handled by the maintenance loop, it will be archived again. In that case, we have to load the chunkDescs to know the lastTime of the series to be archived. Usually, this case will happen only rarely (as a race, has never happened so far, possibly because the locking around unarchiving and the subsequent sample append is smart enough). However, during crash recovery, we sometimes treat series as "freshly unarchived" without directly appending a sample. We might add more cases of that type later, so better deal with archiving properly and load chunkDescs if required.	10 years ago
Bjoern Rabenstein	eb932d1524	Remove a deadlock during shutdown.	10 years ago
Brian Brazil	e56786b221	Have scrape time as a pseudovariable, not a prometheus variable. This ensures it has the right timestamp, and is easier to work with. Switch sd variable away from 'outcome', using total/failed instead.	10 years ago
Bjoern Rabenstein	ff24070a03	Fix embarrassing bug in crash recovery. (And yes, we always knew we need tests for that. I have added a TODO now.) Change-Id: I9cf52bbf98e263e0b79404bda4c442beba9696a8	10 years ago
Julius Volz	c9618d11e8	Introduce copy-on-write for metrics in AST. This depends on changes in: https://github.com/prometheus/client_golang/tree/cow-metrics. Change-Id: I80b94833a60ddf954c7cd92fd2cfbebd8dd46142	10 years ago
Bjoern Rabenstein	afd864e7f4	Adjust to the new version of goleveldb. (And yes, we do want vendoring for that... This is just the quick fix.) Change-Id: I9d347a64d96de6b3390a0e35c8d466f14bb83e4e	10 years ago
Bjoern Rabenstein	fee88a7a77	Remove the remaining races, new and old. Also, resolve a few other TODOs. Change-Id: Icb39b5a5e8ca22ebcb48771cd8951c5d9e112691	10 years ago
Bjoern Rabenstein	66c80b5ebd	Fix typo. Change-Id: I72608c7841c00145458807d3c3ee29db7b5ac2bc	10 years ago
Bjoern Rabenstein	674624f1c8	Completed more TODOs. - Documented checkpoint file format. - High-level description of series sanitation. - Replace fp.LoadFromString panic with an error. (Change in client_golang already submitted.) - Introduced checks for series file size where appropriate. - Removed two Law of Demeter violations. Change-Id: I555d97a2c8f4769820c2fc8bf5d6f4e160222abc	10 years ago
Bjoern Rabenstein	7d11019aa2	Squash a few trivial TODOs. - Delete unneeded file view_adapter.go. - Assessed that we still need the fingerprints in nodes (to create iterators). - Turned numMemChunkDescs into a metric. Change-Id: I29be963c795a075ec00c095f76bf26405535609d	10 years ago
Bjoern Rabenstein	49683c0c20	Avoid test flags in normal binary. Change-Id: If1fba813a73bf93ea5918dcda326e3ffa81a797d	10 years ago
Bjoern Rabenstein	9bc05052ad	Add line that has mysteriously disappeared after rebase. Change-Id: I3612eb0b626e66e607b363e9801f187d2ba637a3	10 years ago
Bjoern Rabenstein	14bda4180c	Changes after pair code review. Change-Id: Ib72d40f8e9027818cfbbd32a7a7201eebda07455	10 years ago
Bjoern Rabenstein	9ea808cd8b	Remove debug log line. Change-Id: Icdd2351b89f2d37ac2b615f9cf872e054c694ad1	10 years ago
Bjoern Rabenstein	bb42cc2e2d	Evict based on memory pressure. Evict recently used chunks last. Change-Id: Ie6168f0cdb3917bdc63b6fe15585dd70c1e42afe	10 years ago

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446 Commits (6b0ef506f375702895fdb4aded45aca32aa9b601)