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Posted to dev@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2008/11/07 08:20:44 UTC

[jira] Commented: (HBASE-986) Cache sockets in DFSClient

    [ https://issues.apache.org/jira/browse/HBASE-986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12645705#action_12645705 ] 

stack commented on HBASE-986:
-----------------------------

>From Dhruba, related HADOOP-3672

> Cache sockets in DFSClient
> --------------------------
>
>                 Key: HBASE-986
>                 URL: https://issues.apache.org/jira/browse/HBASE-986
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: stack
>            Assignee: stack
>            Priority: Blocker
>             Fix For: 0.19.0
>
>         Attachments: socketCache.patch
>
>
> Talking with Dhruba here at Apachecon, he suggested that setup of sockets is big price payed during random-read.  Stefan hacked into DFSClient an ugly patch that would allow us quickly test random-reading on top of a cache of cached sockets.  I just tested it.  I see 4X improvement.
> Making this a blocker on 0.19.0.  Looks like we can hack in a real socket pool using a custom SocketFactory under DFSClient.  It'll be messy but the promised improvement is big.

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