hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Dave Thompson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-1148) Convert FSDataset to ReadWriteLock
Date Mon, 23 Feb 2015 15:11:12 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14333378#comment-14333378
] 

Dave Thompson commented on HDFS-1148:
-------------------------------------

5 years out, I am not working on this, nor am I up on it's current relevance.  Please close
it out as you see fit, or take the assignee.

> Convert FSDataset to ReadWriteLock
> ----------------------------------
>
>                 Key: HDFS-1148
>                 URL: https://issues.apache.org/jira/browse/HDFS-1148
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode, performance
>            Reporter: Todd Lipcon
>            Assignee: Dave Thompson
>         Attachments: hdfs-1148-old.txt, hdfs-1148-trunk.txt, patch-HDFS-1148-rel0.20.2.txt
>
>
> In benchmarking HDFS-941 I noticed that for the random read workload, the FSDataset lock
is highly contended. After converting it to a ReentrantReadWriteLock, I saw a ~25% improvement
on both latency and ops/second.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message