hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2080) Speed up DFS read path
Date Tue, 21 Jun 2011 06:45:47 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2080?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon updated HDFS-2080:
------------------------------

    Attachment: hdfs-2080.txt

Updated patch to fix a couple of the issues mentioned above:
- fix a couple of tests which used {{new Socket}} directly instead of the {{SocketFactory}}
-- thus they didn't have associated Channels and BlockReader failed
- fix blockreader to handle EOF correctly (fixes TestClientBlockVerification)
- fix TestSeekBug to use readFully where necessary


the append-related bug still exists, but this patch should be useful enough for some people
to play around with this if interested.

> Speed up DFS read path
> ----------------------
>
>                 Key: HDFS-2080
>                 URL: https://issues.apache.org/jira/browse/HDFS-2080
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs client
>    Affects Versions: 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: 0.23.0
>
>         Attachments: hdfs-2080.txt, hdfs-2080.txt
>
>
> I've developed a series of patches that speeds up the HDFS read path by a factor of about
2.5x (~300M/sec to ~800M/sec for localhost reading from buffer cache) and also will make it
easier to allow for advanced users (eg hbase) to skip a buffer copy. 

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message