hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Aaron T. Myers (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2989) HA: Optimize quota tracking for HA
Date Sat, 03 Mar 2012 01:39:55 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2989?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Aaron T. Myers updated HDFS-2989:

    Issue Type: Improvement  (was: Sub-task)
        Parent:     (was: 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: Improvement
>          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)

This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira


View raw message