Field math works similar to condition evaluation, but not the exact same
because we have more information to work with in field expressions than
we do in conditional math because fields retain the information about
their source while conditions do not.
The main difference is that you cannot add an unsigned literal to the
output of an integer iterator while you can inside of a condition. You
can perform math on a positive integer literal to an unsigned iterator.
Inside of the condition, we aren't sure if an integer is because of a
literal or because of an iterator so we can't make that distinction.
Any operation between an int64 and uint64 results in the type becoming a
uint64. This is because the most common will usually be an unsigned
cursor being modified by an int literal. Even in cases where we were to
add an unsigned literal to an integer iterator, that would just result
in it being recast back and overflow.
The fysncs due to large writes when writing to TSM files and the
WAL can eventually cause large pauses. Since we already buffer
writes, using synchronous IO reduces fsync latency by ensuring
the individiual writes hit disk. This spreads out the latecncy
across multiple writes better.
The -race flag makes the tests timeout on the Windows VMs so we're
removing it. Race enabled tests will still happen for linux builds.
Also increases the timeout on the tests.
This commit adds a basic TSI versioning scheme, by adding a Version field
to an index's MANIFEST file.
Existing TSI indexes will not have this field present in their MANIFEST
files, and thus will be deemed incomatible with the current version.
Users with existing TSI indexes will be able to remove them, and convert the
resulting inmem indexes to the current version of a TSI index using the
influx_inspect tooling.
This commit replaces the previous hashing algorithm used by the pkg.Filter with
one based on xxhash. Further, taking from the hashing literature, we can
represent k hashes with only two hash function, where previously Filter was using
four.
Further, unlike `murmur3`, `xxhash` is allocation-free, so allocations have
dramatically reduced when inserting and checking for hashes.
Jonathan A. Sternberg
Mark Rushakoff
Lyon Hill
Andrew Hare
Andrew Hare
liketic
Mark Rushakoff
Joe LeGasse
Edd Robinson
Jason Wilder
Jason Wilder
nwante
Adam