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From "Yuki Morishita (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-3668) Performance of sstableloader is affected in 1.0.x
Date Thu, 05 Jan 2012 22:47:40 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3668?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13180910#comment-13180910
] 

Yuki Morishita commented on CASSANDRA-3668:
-------------------------------------------

Right...

In 0.8, we use java.nio to transfer files. We switched to normal java.io in 1.0 because of
compression (both for sstable and internode streaming) and index building during streaming.
So basically transferring files is faster in 0.8, though 0.8 needs to build indexes and BFs
after transferring file.

Manish, how many files are you loading? And could you tell me the size of those files?
                
> 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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