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https://issues.apache.org/jira/browse/HDFS-2989?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aaron T. Myers updated HDFS-2989:
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Target Version/s: 0.24.0
Affects Version/s: (was: HA branch (HDFS-1623))
0.24.0
Converting to top-level issue with commit of HDFS-1623.
> HA: Optimize quota tracking for HA
> ----------------------------------
>
> Key: HDFS-2989
> URL: https://issues.apache.org/jira/browse/HDFS-2989
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha, name-node
> Affects Versions: 0.24.0
> Reporter: Todd Lipcon
> Priority: Minor
>
> Currently after each segment we read in on the standby, we re-calculate all
> of the quota/usage information throughout the directory tree. This is
> inefficient. There are two potential optimizations: (a) we could maintain the
> quotas incrementally as edits are read, or (b) we could defer all quota
> computation until the node transitions to active mode. (b) is probably less
> bug-prone.
> This is not a crucial optimization since in the worst case it might just
> delay failover by a few extra seconds (the time to traverse the in-memory
> FSDirectory)
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