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19 commits

Author SHA1 Message Date
Fabian Reinartz 96d7f540d4 Persist series without allocating the full set 
Change index persistence for series to not be accumulated in memory
before being written as one large batch. `Labels` and `ChunkMeta`
objects are reused.
This cuts down memory spikes during compaction of multiple blocks
significantly.

As part of the the Index{Reader,Writer} now have an explicit notion of
symbols and series must be inserted in order.
 2017-08-06 12:06:41 +02:00
Goutham Veeramachaneni 401bdfd4a6 Make Chunks return the number of samples inside 
Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>
 2017-07-12 18:45:12 +02:00
Julius Volz 0e2f8917ed Also add original license info to bstream.go 
Plus, extend the messages a bit to mention the origin repo.
 2017-05-03 01:32:09 +02:00
Fabian Reinartz 87676f4a26 Add dgryski/go-tsz LICENSE to header 2017-05-02 11:26:01 +02:00
Fabian Reinartz 778103b450 Add liecence file and headers 2017-04-10 20:59:45 +02:00
Goutham Veeramachaneni 761e4768f3
Lint and Vet Fixes 2017-03-19 21:35:01 +05:30
Fabian Reinartz 62b8ded0a5 Rename iterator value getters to At() 2017-01-02 13:33:06 +01:00
Fabian Reinartz 5d75a3dc7b Add basic compaction 
This adds a basic compactor that will merge two persisted blocks into
one. It simply fully rewrites the index and concatenates the chunk
lists.

It just writes into the current working dir and doesn't properly handle
which blocks to compact for now.
 2017-01-02 10:34:55 +01:00
Fabian Reinartz 675f0886f0 Append to chunks cannot error 2016-12-31 10:10:27 +01:00
Fabian Reinartz 70a0224f19 Change chunk sample number to BigEndian 2016-12-12 08:11:53 +01:00
Fabian Reinartz 40a451694f Refactor persistence into interfaces 2016-12-09 20:45:46 +01:00
Fabian Reinartz b845f8d3a1 Reduce test data allocations 2016-12-08 11:59:54 +01:00
Fabian Reinartz c5945177fb chunks: helper for bit range 2016-12-07 15:37:37 +01:00
Fabian Reinartz 0b6d621471 chunks: bring back lead/trail reuse, truncate incomplete sample 2016-11-30 23:01:01 +01:00
Fabian Reinartz 8c48dc2ca5 chunks: varint encoding in first full 64bit numbers 
This saves about 7 bytes per chunk
 2016-11-30 22:14:23 +01:00
Fabian Reinartz fa181a34c1 chunks: cleanup anything but xor encoding 
xor encoding is fast enough for our purposes and provides
very good compression.
We remove all other ones that partially don't support floats
for the sake of simplicity.
 2016-11-29 22:02:58 +01:00
Fabian Reinartz e67cf768dc chunks: remove intermeidate copy from xor chunk 2016-11-20 16:24:46 +01:00
Fabian Reinartz 7874d28f32 chunks: implement xor encoding 2016-11-20 14:33:00 +01:00
Fabian Reinartz ae7b18ae34 Add chunk package 2016-11-15 10:33:34 +01:00