Commit graph

128 commits

Author SHA1 Message Date
Bjoern Rabenstein 4efc60174b Tweak and verify a few parameters.
Remove TODOs accordingly.

Change-Id: Ic062e13b6ae89a9135d3f14011114fe1cca1cef8
2014-11-25 17:09:43 +01:00
Bjoern Rabenstein 5f8e9617ef Add more tests.
Add an end-to-end fuzz and race test.

Fix a race exposed by the above.

Change-Id: Ifaa39a90cefbde8d4c29bda197cc92592ded21bb
2014-11-25 17:09:17 +01:00
Bjoern Rabenstein d215e013b7 Fix the weird chunkDesc shuffling bug.
The root cause was that after chunkDesc eviction, the offset between
memory representation of chunk layout (via chunkDescs in memory) was
shiftet against chunks as layed out on disk. Keeping the offset up to
date is by no means trivial, so this commit is pretty involved.

Also, found a race that for some reason didn't bite us so far:
Persisting chunks was completel unlocked, so if chunks were purged on
disk at the same time, disaster would strike. However, locking the
persisting of chunk revealed interesting dead locks. Basically, never
queue under the fp lock.

Change-Id: I1ea9e4e71024cabbc1f9601b28e74db0c5c55db8
2014-11-25 17:09:17 +01:00
Bjoern Rabenstein f1de5b0c4e Run checkpointing of in-memory metrics and head chunks periodically.
Checkpointing interval is now a command line flag.

Along the way, several things were refactored.
- Restructure the way the storage is started and stopped..
- Number of series in checkpoint is now a uint64, not a varint.
  (Breaks old checkpoints, needs wipe!)
- More consistent naming and order of methods.

Change-Id: I883d9170c9a608ee716bb0ab3d0ded8ca03760d9
2014-11-25 17:09:04 +01:00
Bjoern Rabenstein 74c9b34a5e Improve storage instrumentation even more.
Add gauge for chunks and chunkdescs in memory (backed by a global
variable to be used later not only for instrumentation but also for
memory management).

Refactored instrumentation code once more (instrumentation.go is back :).

Change-Id: Ife39947e22a48cac4982db7369c231947f446e17
2014-11-25 17:09:04 +01:00
Bjoern Rabenstein 443dd33805 Improve instrumentation in storage.
Also, fix some other minor bugs.

Change-Id: If72f1c058b0f47d3e378fdf80228d7e9a8db06c7
2014-11-25 17:09:04 +01:00
Bjoern Rabenstein 95f392fb2c Prevent an indexing death spiral.
Change-Id: I86b20cd0830d02f87b2f020767257e2d3fb2033c
2014-11-25 17:09:04 +01:00
Bjoern Rabenstein 40354eaa29 Reduce directory depth by one.
Change-Id: I7f89df61135ff19169ed97633a662685d414c448
2014-11-25 17:09:04 +01:00
Bjoern Rabenstein 096fa0f8b2 Squash a number of TODOs.
- Staleness delta is no a proper function parameter and not replicated
  from package ast.

- Named type 'chunks' replaced by explicit '[]chunk' to avoid confusion.

- For the same reason, replaced 'chunkDescs' by '[]*chunkDescs'.

- Verified that math.Modf is not a speed enhancement over conversion
  (actually 5x slower).

- Renamed firstTimeField, lastTimeField into chunkFirstTime and
  chunkLastTime.

- Verified unpin() is sufficiently goroutine-safe.

- Decided not to update archivedFingerprintToTimeRange upon series
  truncation and added a rationale why.

Change-Id: I863b8d785e5ad9f71eb63e229845eacf1bed8534
2014-11-25 17:09:04 +01:00
Julius Volz 7f5d3c2c29 Fix and improve the fp locker.
Benchmark:
$ go test -bench 'Fingerprint' -test.run 'Fingerprint' -test.cpu=1,2,4

OLD
BenchmarkFingerprintLockerParallel        500000              3618 ns/op
BenchmarkFingerprintLockerParallel-2      100000             12257 ns/op
BenchmarkFingerprintLockerParallel-4      500000             10164 ns/op
BenchmarkFingerprintLockerSerial        10000000               283 ns/op
BenchmarkFingerprintLockerSerial-2      10000000               284 ns/op
BenchmarkFingerprintLockerSerial-4      10000000               288 ns/op

NEW
BenchmarkFingerprintLockerParallel       1000000              1018 ns/op
BenchmarkFingerprintLockerParallel-2     1000000              1164 ns/op
BenchmarkFingerprintLockerParallel-4     2000000               910 ns/op
BenchmarkFingerprintLockerSerial        50000000                56.0 ns/op
BenchmarkFingerprintLockerSerial-2      50000000                47.9 ns/op
BenchmarkFingerprintLockerSerial-4      50000000                54.5 ns/op

Change-Id: I3c65a43822840e7e64c3c3cfe759e1de51272581
2014-11-25 17:07:45 +01:00
Bjoern Rabenstein 8fba3302bc Bold changes to concurrency.
(WIP. Probably doesn't work yet.)

Change-Id: Id1537dfcca53831a1d428078a5863ece7bdf4875
2014-11-25 17:07:45 +01:00
Bjoern Rabenstein 7e6a03fbf9 Fix a few concurrency issues before starting to use the new fp locker.
Change-Id: I8615e8816e79ef0882e123163ee590c739b79d12
2014-11-25 17:07:45 +01:00
Julius Volz df1b2a2422 Fix indexing latency instrumentation.
Change-Id: I532c170121cd2996d1a378adbb1fd551cd5a4e38
2014-11-25 17:07:44 +01:00
Julius Volz a746fbb8bc Instrument indexing: queue length, batch sizes and latencies.
Change-Id: I60bcbd24b160e47d418a485d8cffa39344a257c6
2014-11-25 17:07:44 +01:00
Bjoern Rabenstein e9ff29c547 Comment/code cleanup.
Change-Id: I38736e3d0fec79759a2bafa35aecf914480ff810
2014-11-25 17:07:44 +01:00
Bjoern Rabenstein 0031a448e2 Add WaitForIndexing.
Change-Id: I5a5c975c4246632f937413322c855bbe63d00802
2014-11-25 17:07:44 +01:00
Bjoern Rabenstein c7aad110fb Add an indexing queue and batch the ops.
Some other improvements on the way, in particular codec -> codable
renaming and addition of LookupSet methods.

Change-Id: I978f8f3f84ca8e4d39a9d9f152ae0ad274bbf4e2
2014-11-25 17:07:44 +01:00
Bjoern Rabenstein 71206dbc06 More code cleanups.
Add license text everywhere.
And others....

Change-Id: I11ccde267a2ef7eb366c4788ba7aeae14ba7545c
2014-11-25 17:07:44 +01:00
Julius Volz 630b5a087a Also consider on-disk fingerprints during purge.
This reintroduces LevelDB iterators so that we can iterate through all
the on-disk fingerprints.

Change-Id: I007ee4638d038d2a4461bbda27f30fcaad411474
2014-11-25 17:07:35 +01:00
Bjoern Rabenstein f5f9f3514a Major code cleanup.
- Make it go-vet and golint clean.
- Add comments, TODOs, etc.

Change-Id: If1392d96f3d5b4cdde597b10c8dff1769fcfabe2
2014-11-25 17:02:53 +01:00
Bjoern Rabenstein bbf49200ab Implement methods in persistence.go.
Change-Id: I804cdd0b30420e171825fd86fe1281eca0d5e638
2014-11-25 17:02:23 +01:00
Bjoern Rabenstein 5a128a04a9 Major reorganization of the storage.
Most important, the heads file will now persist all the chunk descs,
too. Implicitly, it will serve as the persisted form of the
fp-to-series map.

Change-Id: Ic867e78f2714d54c3b5733939cc5aef43f7bd08d
2014-11-25 17:02:01 +01:00
Bjoern Rabenstein 4770cf76a4 Make index package more self-contained.
Moved interna from diskPersistence into the indexer.
TotalIndexer now called diskIndexer.

Change-Id: I6c8c62cb171f12bbd8a5474773af7786d71ba388
2014-11-25 17:02:01 +01:00
Bjoern Rabenstein 89f10e8eb2 Move to using the standard library interfaces for encoding/decoding.
BinaryMarshaler instead of encodable.
BinaryUnmarshaler instead of decodable.

Left 'codable' in place for lack of a better word.

Change-Id: I8a104be7d6db916e8dbc47ff95e6ff73b845ac22
2014-11-25 17:02:01 +01:00
Julius Volz 7e85711df0 Beginnings of a tiered index implementation.
This reintroduces a LevelDB-based metrics index.

Change-Id: I4111540301c52255a07b2f570761707a32f72c05
2014-11-25 17:02:00 +01:00
Julius Volz 8dfaa5ecd2 Remove use of freelists for chunk bufs.
Change-Id: Ib887fdb61e1d96da0cd32545817b925ba88831c1
2014-11-25 17:02:00 +01:00
Bjoern Rabenstein ecdf5ab14f Index-persistence switched from gob to a hand-coded solution.
Change-Id: Ib4ec42535bd08df16d34d4774bb638e35c5a1841
2014-11-25 17:02:00 +01:00
Julius Volz e7ed39c9a6 Initial experimental snapshot of next-gen storage.
Change-Id: Ifb8709960dbedd1d9f5efd88cdd359ee9fa9d26d
2014-11-25 17:02:00 +01:00