[ https://issues.apache.org/jira/browse/HBASE-15046?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack resolved HBASE-15046. --------------------------- Resolution: Fixed Fix Version/s: 2.0.0 Release Note: In here we perf tested a realignment of the write pipeline and mvcc handling. Thought was that this work was a predicate for a general fix of HBASE-14460 (turns out, realignment of write path was not needed to fix the increment perf regression). The perf testing here made it so we were able to simplify writing. HBASE-15158 was just committed. This work is done. > Perf test doing all mutation steps under row lock > ------------------------------------------------- > > Key: HBASE-15046 > URL: https://issues.apache.org/jira/browse/HBASE-15046 > Project: HBase > Issue Type: Sub-task > Components: Performance > Reporter: stack > Assignee: stack > Fix For: 2.0.0 > > Attachments: 1.2.svg, 1.2.v2.svg, 50threads_ycsb.png, > all_under_lock.patch, all_under_lock.svg, call_times_0-1_and_1-3_ycsb.png, > compare.png, gc.png, latencies.png, nopatch.png, > notpatched.workloadw.80percentwrites.json, ops.png, patched.png, > patched.workloadw.80percentwrites.json, writes.png > > > This issue is about perf testing a redo of the write pipeline so that rather > than: > * take rowlock > * start mvcc > * append to WAL > * add to memstore > * sync WAL > * let go of rowlock > * finish up mvcc > instead.... try... > * take rowlock > * start mvcc > * append to WAL > * sync WAL > * add to memstore > * finish up mvcc > * let go of rowlock > The latter is more straight-forward undoing need of rolling back memstore if > all does not succeed. > It might be slower though. This issue is a look-see/try it. > The redo will also help address the parent issue in a more general way so we > can do without the special-casing done for branch-1.0 and branch-1.1 done in > a sibling subtask. > Other benefits are that the current write pipeline is copy/pasted in a few > places -- in append, increment and checkand* -- and a refactor will allow us > to fix this duplication. -- This message was sent by Atlassian JIRA (v6.3.4#6332)