tcpnodelay is false by default; it should be true?
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Key: HBASE-2125
URL: https://issues.apache.org/jira/browse/HBASE-2125
Project: Hadoop HBase
Issue Type: Bug
Reporter: stack
Up on IRC, nagles algo came up. Thought was that it should be off by default
in our RPC only we'd need to check that nodelay didn't do damage:
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22:16 < javarants1> appears to be enabled unless you set it in the config
22:16 < dj_ryan> good good
22:16 < javarants1> probably want to set hbase.ipc.client.tcpnodelay and
ipc.server.tcpnodelay to true and test that
...
22:27 < St^Ack> So, lads, tcpnodelay should be TRUE on client and server by
default rather than as they currently are, false? If so, I should get this
change into 0.20.3 (I can't repro kannan's hang still)
22:28 < Toad> nodelay true makes sense but you should make sure that you've got
appropriate buffering then
22:28 < Toad> otherwise you'll get a bajillion packets per second and you'll
suck throughputwise
22:29 < dj_ryan> we buffer entire rows and whatnot
22:29 < dj_ryan> so shouldnt be a problem i think
22:29 < Toad> yea, worth watching a wireshark though, make sure your packet
trace looks the same
22:29 < St^Ack> thanks Toad ... then that means punt till 0.21 (smile)
22:29 < St^Ack> not in imminent 0.20.3
22:31 < Toad> yea, I wouldn't switch unless you have time to look it over
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