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70 Commits (74b0336d0694b342e81dfcecf0c3038e2bffc7e3)

Author SHA1 Message Date
Simon Pasquier 3e17cd1621 Instrument WAL corruptions 2017-10-06 13:50:20 +02:00
Fabian Reinartz 27f1b8aac3 Merge pull request #162 from BasPH/fsync-duration 
Instrument WAL fsync
 2017-10-05 08:18:36 +02:00
Bas Harenslak 5e1c258a98 Instrument WAL fsync 2017-10-04 22:17:02 +02:00
Goutham Veeramachaneni da565f975e Merge pull request #161 from prometheus/fileutil 
Remove dependency on etcd/pkg/fileutil
 2017-10-04 17:08:54 +05:30
Fabian Reinartz bbe72dccb9 Remove dependency on etcd/pkg/fileutil 2017-10-04 10:23:41 +02:00
Goutham Veeramachaneni c35d3a65bd
Add levels to all log lines. 
Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>
 2017-09-28 12:49:34 +05:30
Fabian Reinartz 1e88ba06b4 Use boolean function instead of postings to drop WAL series 
There is not guarantee or requirement for WAL writers to only add
series entries in increasing order of IDs. A postings list cannot look
back and thus unordered WAL entries would skip over IDs to not truncate
from the WAL.
We replace it with a simple boolean check function that does not require
order.
 2017-09-21 13:31:01 +02:00
Fabian Reinartz 162a48e4f2 Create series with ID recorded in WAL when reading it back 2017-09-19 11:31:16 +02:00
Fabian Reinartz 7ada9cd805 Simplify series create logic in head 2017-09-18 12:38:39 +02:00
Fabian Reinartz 6892fc6dcb Finish old WAL segment async, default to no fsync 
We were still fsyncing while holding the write lock when we cut a new
segment. Given we cannot do anything but logging errors, we might just
as well complete segments asynchronously.

There's not realistic use case where one would fsync after every WAL
entry, thus make the default of a flush interval of 0 to never fsync
which is a much more likely use case.
 2017-09-08 18:41:12 +02:00
Fabian Reinartz 1d5f85817d Fix various races 2017-09-08 08:48:19 +02:00
Fabian Reinartz c2916736be Re-use slices on deocding the WAL. Fix tests. 2017-09-08 08:17:01 +02:00
Fabian Reinartz 0db4c227b7 Fix min/max time handling and concurrent crc32 usage 2017-09-07 13:04:02 +02:00
Fabian Reinartz 970bffec8d Fix WAL errors and add tests for it 2017-09-07 10:58:34 +02:00
Fabian Reinartz 81222849bc Filter WAL data in Head, misc fixes 2017-09-06 16:20:37 +02:00
Fabian Reinartz 33e9bdf403 WAL refactoring and truncation fixes and test 2017-09-06 14:59:25 +02:00
Fabian Reinartz c36d574290 Replace single head lock with granular locks 
This adds various new locks to replace the single big lock on
the head. All parts now must be COW as they may be held by clients
after initial retrieval.
Series by ID and hashes are now held in a stripe lock to reduce
contention and total holding time during GC. This should reduce
starvation of readers.
 2017-09-05 14:41:39 +02:00
Fabian Reinartz 1ddedf2b30 Change series ID from uint32 to uint64 2017-09-04 16:08:38 +02:00
Goutham Veeramachaneni 1698c516ad [WIP]: WAL implementation 
Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>
 2017-09-04 14:52:40 +02:00
Fabian Reinartz 893b6ec506 Add tests for GC and chunk truncation 2017-09-01 14:38:49 +02:00
Fabian Reinartz 5cf2662074 Refactor WAL into Head and misc improvements 2017-09-01 11:50:58 +02:00
Fabian Reinartz 3901b6e70b Remove multiple heads 
This changes the structure to a single WAL backed by a single head
block.
Parts of the head block can be compacted. This relieves us from any head
amangement and greatly simplifies any consistency and isolation concerns
by just having a single head.
 2017-09-01 11:50:58 +02:00
Alin Sinpalean 8f7934d025 Take the fdatasync() syscall out from under mutex lock to (mostly) avoid scrape and eval from blocking on disk I/O. 2017-09-01 09:45:54 +02:00
Matt Layher 78b15c3434
Add newCRC32 function to simplify hash initialization 2017-08-26 12:04:00 -04:00
Goutham Veeramachaneni 7438ed7035 Expose Intervals type for use by TombstoneReader. 
TombstoneReader is exposed but Intervals is not.

Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>
 2017-08-25 16:06:36 +05:30
Goutham Veeramachaneni 44e9ae38b5
Incorporate PR feedback. 
* Expose Stone as it is used in an exported method.
* Move from tombstoneReader to []Stone for the same reason as above.
* Make WAL reading a little cleaner.

Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>
 2017-05-26 21:26:31 +05:30
Goutham Veeramachaneni bacb143b7e
Simplify tombstone and WAL Delete formats. 
Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>
 2017-05-24 13:42:56 +05:30
Goutham Veeramachaneni f29fb62fba
Make TombstoneReader a Getter. 
Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>
 2017-05-24 11:24:24 +05:30
Goutham Veeramachaneni 9bf7aa9af1
Misc. fixes incorporating feedback. 
Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>
 2017-05-23 18:13:30 +05:30
Goutham Veeramachaneni 3eb4119ab1
Make HeadBlock use WAL. 
Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>
 2017-05-23 16:15:16 +05:30
Fabian Reinartz 39df7e2bba Switch blocks to ULID directories, drop sequenc numbers 2017-05-18 16:09:30 +02:00
Fabian Reinartz 4862b261d0 Abstract WAL into interface 2017-05-13 17:09:26 +02:00
Fabian Reinartz 535532ca02 Export refdSample 
The type was part of a exported method signatures and should therefore
be exported as well.
 2017-05-12 17:06:26 +02:00
Julius Volz 8d1fb4fa01 Minor comment fixes and additions. 2017-04-28 15:41:42 +02:00
Fabian Reinartz 778103b450 Add liecence file and headers 2017-04-10 20:59:45 +02:00
Fabian Reinartz 10c7c9acbe Adjust import names to new repository organisation 2017-04-04 11:27:26 +02:00
Fabian Reinartz 55ee4b5b3b Merge branch 'master' of github.com:fabxc/tsdb 2017-03-21 10:11:39 +01:00
Fabian Reinartz 9c93f8f2aa Fix various races 
This fixes different race condition encoutnered when running Prometheus.
It reduces the overall performance in the synthetic benchmark a fair bit
but has no indiciations of impacting a real-world setup notably.
 2017-03-20 14:45:27 +01:00
Goutham Veeramachaneni 761e4768f3
Lint and Vet Fixes 2017-03-19 21:35:01 +05:30
Fabian Reinartz ad5812d83a Handle WAL corruption by truncating 
This adds handling for various corruption scenarios of the WAL.
If corruption is encountered, we truncate the WAL after the last valid
entry transparently and continue appending after the offset.
 2017-03-15 11:16:16 +01:00
Fabian Reinartz d3edfb5540 Test multiple full write/restore cylcles in WAL 2017-03-08 21:02:08 +01:00
Fabian Reinartz cb4dde7659 Fix WAL log recovery bug 
This fixes a bug where the last WAL file was closed after consuming it
instead of being left open for further writes.
Reloading of blocks on startup considers loading head blocks now.
 2017-03-08 16:53:07 +01:00
Fabian Reinartz 55a9b5428a Add separate head mutex 
Introduce a seperate mutex for the head blocks to avoid a race where
a post-compaction reload may run between switching the DB's base mutex
to create a new head block in an appender.
 2017-03-04 17:41:01 +01:00
Fabian Reinartz ffb24a98f4 Add missing unlock, run debug endpoint in benchmark 2017-03-02 21:54:02 +01:00
Fabian Reinartz f734773214 Replace per-file locking with single PID lock file 
File locks have a multitude of problems that make them hard to use
correctly. As they are just advisory, they are only meaningful to
prevent accidents like running the same process twice.
A simple PID file lock works reliably in those cases and is simpler.
 2017-02-19 13:01:19 +01:00
Fabian Reinartz afa084920c Use Castagnoli polynomial for CRC32s; cache them 2017-02-15 21:13:17 -08:00
Fabian Reinartz 9c7a88223e Add full encode/decode WAL cycle test 2017-02-14 21:55:50 -08:00
Fabian Reinartz 2c97428a79 Add basic WAL tests 2017-02-14 16:12:56 -08:00
Fabian Reinartz 84e8027a8e Close consumed WAL segments, verify checksums on read 2017-02-14 00:42:06 -08:00
Fabian Reinartz eeb03e97e2 Add headers and format flag for WAL segments 2017-02-14 00:24:53 -08:00