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From "Yuki Morishita (Issue Comment Edited) (JIRA)" <j...@apache.org>
Subject [jira] [Issue Comment Edited] (CASSANDRA-3668) Performance of sstableloader is affected in 1.0.x
Date Thu, 29 Dec 2011 22:34:30 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3668?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13177432#comment-13177432
] 

Yuki Morishita edited comment on CASSANDRA-3668 at 12/29/11 10:33 PM:
----------------------------------------------------------------------

Manish,

sstableLloader loads sstables by streaming data files to the cluster, and from 1.0, CASSANDRA-3080
introduced throttling for streaming.
By default, {{stream_throughput_outbound_megabits_per_sec}} is set to 400 Mbps or 50MB/sec.
You can turn off throttling by setting 0 inside cassandra.yaml.

You can observe the behavior of throttling in sstableloader by changing log level to TRACE
or DEBUG in conf/log4j-tools.properties, and  look for log with the term "Throttle". (Sample
log output for throttling is attached in CASSANDRA-3080.)
                
      was (Author: yukim):
    Manish,

sstableLloader loads sstables by streaming data files to the cluster, and from 1.0, CASSANDRA-3080
introduced throttling for streaming.
By default, {{stream_throughput_outbound_megabits_per_sec}} is set to 400 Mbps or 50MB/sec.
You can turn off throttling by setting 0 inside cassandra.yaml.

You can observe the behavior of throttling by changing log level to TRACE or DEBUG in conf/log4j-tools.properties,
and  look for log with the term "Throttle". (Sample output for throttling is attached in CASSANDRA-3080.)
                  
> 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
>
>   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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