hadoop-common-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Johan Oskarson (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-297) When selecting node to put new block on, give priority to those with more free space/less blocks
Date Tue, 13 Jun 2006 16:28:30 GMT
     [ http://issues.apache.org/jira/browse/HADOOP-297?page=all ]

Johan Oskarson updated HADOOP-297:
----------------------------------

    Attachment: priorityshuffle_v1.patch

Instead of selecting random nodes, give priority to the ones with lots of free space and few
blocks

> When selecting node to put new block on, give priority to those with more free space/less
blocks
> ------------------------------------------------------------------------------------------------
>
>          Key: HADOOP-297
>          URL: http://issues.apache.org/jira/browse/HADOOP-297
>      Project: Hadoop
>         Type: Improvement

>   Components: dfs
>     Versions: 0.3.2
>     Reporter: Johan Oskarson
>     Priority: Minor
>  Attachments: priorityshuffle_v1.patch
>
> As mentioned in previous bug report:
> We're running a smallish cluster with very different machines, some with only 60 gb harddrives
> This creates a problem when inserting files into the dfs, these machines run out of space
quickly while some have plenty of space free.
> So instead of just shuffling the nodes, I've created a quick patch that first sorts the
target nodes by (freespace / blocks).
> It then randomizes the position of the first third of the nodes (so we don't put all
the blocks in the file on the same machine)
> I'll let you guys figure out how to improve this.
> /Johan

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
   http://issues.apache.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see:
   http://www.atlassian.com/software/jira


Mime
View raw message