This switches all the interfaces that take string series key to
take a []byte. This eliminates many small allocations where we
convert between to two repeatedly. Eventually, this change should
propogate futher up the stack.
The refs map was to increment the file references one time each.
It doesn't hurt to increment them multiple times though.
We also do not need to copy the files slice as we are accessing it
under a read lock so it can't be changed.
tsdb.Shard and tsdb.Shards both implement tsdb.ShardGroup and neither
were tested within the tsdb package itself. This adds tests for those
methods which are used by the query engine.
There was a change to speed up deleting and dropping measurements
that executed the deletes in parallel for all shards at once. #7015
When TSI was merged in #7618, the series keys passed into Shard.DeleteMeasurement
were removed and were expanded lower down. This causes memory to blow up
when a delete across many shards occurs as we now expand the set of series
keys N times instead of just once as before.
While running the deletes in parallel would be ideal, there have been a number
of optimizations in the delete path that make running deletes serially pretty
good. This change just limits the concurrency of the deletes which keeps memory
more stable.
When snapshots and compactions are disabled, the check to see if
the compaction should be aborted occurs in between writing to the
next TSM file. If a large compaction is running, it might take
a while for the file to be finished writing causing long delays.
This now interrupts compactions while iterating over the blocks to
write which allows them to abort immediately.
When a time zone shift happened at the edge of a time bucket, the logic
was incorrect. When we added an hour to the day with a time grouping of
2 hours, we took the hour away from the previous bucket instead of the
next bucket so the first bucket of the day would be from midnight to 1
AM and the second bucket would include 1 AM to 4 AM (2 AM to 3 AM does
not exist when shifting forwards). The correct buckets should have been
12 AM to 2 AM for the first bucket of the day and 3 AM to 4 AM for the
second (since 2 AM to 3 AM does not exist).
This also modifies the tests to use table tests and sub tests.
* introduced UnsignedValue type
* leveraged existing int64 compression algorithms (RLE, Simple 8B)
* tsm and WAL can read and write UnsignedValue
* compaction is aware of UnsignedValue
* unsigned support to model, cursors and write points
NOTE: there is no support to create unsigned points, as the line
protocol has not been modified.
Stuart Carnie
Edd Robinson
Jason Wilder
Jonathan A. Sternberg
Jason Wilder
Ryan Betts
Jonathan Heusser
Connor Peet