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From "Manish Zope (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-3668) Performance of sstableloader is affected in 1.0.x
Date Wed, 04 Jan 2012 16:11:40 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3668?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13179591#comment-13179591
] 

Manish Zope commented on CASSANDRA-3668:
----------------------------------------

Yuki,

Our test environment consist of cassandra cluster of two nodes and one loader machine.
Readings of the I/O and CPU usage is mentioned in the attached text file.

Specifically we don't see any spikes in cpu usage either on loader or cassandra nodes.
During data load with 0.8.7 setup the average load on the cassandra nodes was higher as compared
to 1.0.7.
So I guess cassandra 1.0.7 is not making full use of the resources available on the cassandra
nodes.

1.0.7 used here is with updated patch mentioned in issue - 3589.

Thanks
Manish
                
> Performance of sstableloader is affected in 1.0.x
> -------------------------------------------------
>
>                 Key: CASSANDRA-3668
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3668
>             Project: Cassandra
>          Issue Type: Bug
>          Components: API
>    Affects Versions: 1.0.7
>            Reporter: Manish Zope
>            Assignee: Yuki Morishita
>             Fix For: 1.0.7
>
>         Attachments: sstable-loader performance.txt
>
>   Original Estimate: 48h
>  Remaining Estimate: 48h
>
> One of my colleague had reported the bug regarding the degraded performance of the sstable
generator and sstable loader.
> ISSUE :- https://issues.apache.org/jira/browse/CASSANDRA-3589 
> As stated in above issue generator performance is rectified but performance of the sstableloader
is still an issue.
> 3589 is marked as duplicate of 3618.Both issues shows resolved status.But the problem
with sstableloader still exists.
> So opening other issue so that sstbleloader problem should not go unnoticed.
> FYI : We have tested the generator part with the patch given in 3589.Its Working fine.
> Please let us know if you guys require further inputs from our side.

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