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Author SHA1 Message Date
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
Fabian Reinartz 79944a5912 Break out WAL into segment files 2017-02-13 23:53:19 -08:00
Fabian Reinartz 9ddbd64d00 Move stats into meta.json file, cleanup, docs 2017-01-19 11:22:47 +01:00
Fabian Reinartz 343dd9d94c Fix wrong byte size in WAL base ref 2017-01-17 08:40:31 +01:00
Fabian Reinartz 9cf49f68e9 wal: use larger buffer 2017-01-16 14:18:25 +01:00
Fabian Reinartz 1c80c33e72 Fix bug of unsorted postings lists being created 
The former approach created unordered postings list by either
map iteration of new series being unsorted (fixable) or concurrent
writers creating new series interleaved.

We switch back to generating ephemeral references for a single batch.
Newly created series have to be re-set upon the next insert.
 2017-01-13 16:22:20 +01:00
Fabian Reinartz 0dffd52238 Use page writer in compaction 2017-01-09 18:47:43 +01:00
Fabian Reinartz 54f5027406 Put WAL lock down into encoder 2017-01-06 18:36:42 +01:00
Fabian Reinartz 300f4e2abf Use separate lock for series creation 
This uses the head block's own lock to only lock if new series were
encountered.
In the general append case we just need to hold a
 2017-01-06 18:10:50 +01:00
Fabian Reinartz 71efd2e08d Periodically fsync WAL, make head cut async 2017-01-06 15:18:06 +01:00
Fabian Reinartz 2eb544c98e Change file names and maker parsing safer 2017-01-06 13:13:22 +01:00
Fabian Reinartz 937cdb579c Switch to sequential block names 
This changes block directory names from the int64 timestamp
to sequential numbering.
 2017-01-06 10:45:03 +01:00
Fabian Reinartz dbd2b21d2e Make persistence atomic 2017-01-02 14:41:13 +01:00
Fabian Reinartz 62b8ded0a5 Rename iterator value getters to At() 2017-01-02 13:33:06 +01:00
Fabian Reinartz 7280533c42 Add basic shard metrics 2016-12-31 09:48:49 +01:00
Fabian Reinartz a009247ab7 Add matching of empty label 2016-12-30 19:36:28 +01:00
Fabian Reinartz 8aba95048a Rename to OpenHeadBlock 2016-12-22 20:00:24 +01:00
Fabian Reinartz e7edae39b2 Use page buffered writer for WAL 2016-12-22 16:14:34 +01:00
Fabian Reinartz 9c6a72aadd Load head with WALs correctly 2016-12-22 15:54:39 +01:00
Fabian Reinartz 1dde3b6d31 Add WAL decoder+loading and benchmarks 2016-12-22 15:18:33 +01:00
Fabian Reinartz 0b8c77361e Add initial WAL writing 2016-12-22 12:05:24 +01:00