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Posted to hdfs-dev@hadoop.apache.org by "dhruba borthakur (JIRA)" <ji...@apache.org> on 2010/04/14 07:44:56 UTC
[jira] Resolved: (HDFS-980) Convert FSNamesystem lock to
ReadWriteLock
[ https://issues.apache.org/jira/browse/HDFS-980?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
dhruba borthakur resolved HDFS-980.
-----------------------------------
Resolution: Duplicate
Duplicate of HDFS-1093
> Convert FSNamesystem lock to ReadWriteLock
> ------------------------------------------
>
> Key: HDFS-980
> URL: https://issues.apache.org/jira/browse/HDFS-980
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.22.0
> Reporter: Todd Lipcon
>
> As Dhruba noted [here|https://issues.apache.org/jira/browse/HDFS-909?focusedCommentId=12834051&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12834051] there would be substantial benefits to converting the FSNamesystem lock over to a ReadWriteLock. The first would be an ability to provide concurrent readers with a throughput increase, and the second would be more safety for operations like in HDFS-909.
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