hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Todd Lipcon (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2465) Add HDFS support for fadvise readahead and drop-behind
Date Fri, 28 Oct 2011 21:01:34 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13138745#comment-13138745
] 

Todd Lipcon commented on HDFS-2465:
-----------------------------------

Failing tests seem unrelated. I ran the webhdfs tests locally and they passed. TestHDFSCLI
fails on my local box, but does so on trunk as well for me.

bq. -1 tests included. The patch doesn't appear to include any new or modified tests.
Unfortunately it's not really possible to unit test this. I ran through several terasorts
on a small test cluster with this patch and verified that it helps performance and didn't
cause stability issues. I've been testing with very similar patches for a couple weeks and
seen no issues. It also is off-by-default.


Given Eli gave a +1 earlier, I will wait a few hours and commit this if there are no further
comments.
                
> Add HDFS support for fadvise readahead and drop-behind
> ------------------------------------------------------
>
>                 Key: HDFS-2465
>                 URL: https://issues.apache.org/jira/browse/HDFS-2465
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: data-node, performance
>    Affects Versions: 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-2465.txt, hdfs-2465.txt, hdfs-2465.txt, hdfs-2465.txt
>
>
> This is the HDFS side of HADOOP-7714. The initial implementation is heuristic based and
should be considered experimental, as discussed in the parent JIRA. It should be off by default
until better heuristics, APIs, and tuning experience is developed.

--
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

        

Mime
View raw message