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Todd Lipcon updated HDFS-1601: ------------------------------ Resolution: Fixed Fix Version/s: (was: 0.22.0) 0.23.0 Hadoop Flags: [Reviewed] Status: Resolved (was: Patch Available) Committed to trunk only since it's an optimization. Let me know if you think this should have gone in 22 > Pipeline ACKs are sent as lots of tiny TCP packets > -------------------------------------------------- > > Key: HDFS-1601 > URL: https://issues.apache.org/jira/browse/HDFS-1601 > Project: Hadoop HDFS > Issue Type: Improvement > Components: data-node > Affects Versions: 0.22.0 > Reporter: Todd Lipcon > Assignee: Todd Lipcon > Fix For: 0.23.0 > > Attachments: hdfs-1601.txt, hdfs-1601.txt > > > I noticed in an hbase benchmark that the packet counts in my network > monitoring seemed high, so took a short pcap trace and found that each > pipeline ACK was being sent as five packets, the first four of which only > contain one byte. We should buffer these bytes and send the PipelineAck as > one TCP packet. -- This message is automatically generated by JIRA. - For more information on JIRA, see: http://www.atlassian.com/software/jira