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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