couchbase / cbgt / 217

54%

push

travis-ci

MB-22836 - optionally allow a single feed per pindex for higher perf

The new FeedAllotmentOption ("feedAllotment"), when used with the
value of FeedAllotmentOnePerPIndex, allows an application to specify
that it wants to have a single feed (i.e., DCP connection) per pindex,
in order to increase indexing concurrency.

The default for the new FeedAllotmentOption is backwards compatible
with previous, existing behavior, of alloting a single feed per index.

Quick turnaround experiments (thanks Pavel Paulau!) seem to improve
indexing performance from a before-change of 9K docs indexed per
second to after-change of >120K docs indexed per second, and becoming
I/O bound (ssd's saturated).

Change-Id: I10439bb23
Reviewed-on: http://review.couchbase.org/73735
Reviewed-by: Marty Schoch <marty.schoch@gmail.com>
Tested-by: Steve Yen <steve.yen@gmail.com>

17 of 17 new or added lines in 1 file covered. (100.0%)

6392 of 11298 relevant lines covered (56.58%)

26.93 hits per line