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Posted to hdfs-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2012/09/07 05:22:07 UTC
[jira] [Created] (HDFS-3898) QJM: enable TCP_NODELAY for IPC
Todd Lipcon created HDFS-3898:
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Summary: QJM: enable TCP_NODELAY for IPC
Key: HDFS-3898
URL: https://issues.apache.org/jira/browse/HDFS-3898
Project: Hadoop HDFS
Issue Type: Sub-task
Affects Versions: QuorumJournalManager (HDFS-3077)
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Priority: Blocker
Currently, if the size of the edits batches is larger than the MTU, it can result in 40ms delays due to interaction between nagle's algorithm and delayed ack. Enabling TCP_NODELAY on the sockets solves this issue, so we should set those configs by default for all of the QJM-related IPC.
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[jira] [Resolved] (HDFS-3898) QJM: enable TCP_NODELAY for IPC
Posted by "Todd Lipcon (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-3898?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Todd Lipcon resolved HDFS-3898.
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Resolution: Fixed
Fix Version/s: QuorumJournalManager (HDFS-3077)
Hadoop Flags: Reviewed
Committed to branch, thanks for the reviews
> QJM: enable TCP_NODELAY for IPC
> -------------------------------
>
> Key: HDFS-3898
> URL: https://issues.apache.org/jira/browse/HDFS-3898
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: QuorumJournalManager (HDFS-3077)
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Blocker
> Fix For: QuorumJournalManager (HDFS-3077)
>
> Attachments: hdfs-3898.txt, hdfs-3898.txt
>
>
> Currently, if the size of the edits batches is larger than the MTU, it can result in 40ms delays due to interaction between nagle's algorithm and delayed ack. Enabling TCP_NODELAY on the sockets solves this issue, so we should set those configs by default for all of the QJM-related IPC.
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