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Hudson commented on HBASE-11355: -------------------------------- FAILURE: Integrated in HBase-1.0 #115 (See [https://builds.apache.org/job/HBase-1.0/115/]) HBASE-11737 Document callQueue improvements from HBASE-11355 and HBASE-11724 (Misty Stanley-Jones) (matteo.bertozzi: rev 5c1ae840f21f7a3857543e408ef20a63be2b0751) * src/main/docbkx/performance.xml > a couple of callQueue related improvements > ------------------------------------------ > > Key: HBASE-11355 > URL: https://issues.apache.org/jira/browse/HBASE-11355 > Project: HBase > Issue Type: Improvement > Components: IPC/RPC, Performance > Affects Versions: 0.99.0, 0.94.20 > Reporter: Liang Xie > Assignee: Matteo Bertozzi > Fix For: 0.99.0, 0.98.4 > > Attachments: HBASE-11355-v0.patch, HBASE-11355-v1.patch, > HBASE-11355-v2.patch, gets.png > > > In one of my in-memory read only testing(100% get requests), one of the top > scalibility bottleneck came from the single callQueue. A tentative sharing > this callQueue according to the rpc handler number showed a big throughput > improvement(the original get() qps is around 60k, after this one and other > hotspot tunning, i got 220k get() qps in the same single region server) in a > YCSB read only scenario. > Another stuff we can do is seperating the queue into read call queue and > write call queue, we had done it in our internal branch, it would helpful in > some outages, to avoid all read or all write requests ran out of all handler > threads. > One more stuff is changing the current blocking behevior once the callQueue > is full, considering the full callQueue almost means the backend processing > is slow somehow, so a fail-fast here should be more reasonable if we using > HBase as a low latency processing system. see "callQueue.put(call)" -- This message was sent by Atlassian JIRA (v6.2#6252)