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Posted to dev@hama.apache.org by "Edward J. Yoon (JIRA)" <ji...@apache.org> on 2012/09/23 01:35:07 UTC
[jira] [Commented] (HAMA-645) Compression Threshold
[ https://issues.apache.org/jira/browse/HAMA-645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13461291#comment-13461291 ]
Edward J. Yoon commented on HAMA-645:
-------------------------------------
{code}
<property>
<name>hama.messenger.compression.class</name>
<value>org.apache.hama.bsp.message.compress.Bzip2Compressor</value>
<description>The message compression algorithm to choose.</description>
</property>
<property>
<name>hama.messenger.compression.threshold</name>
<value>1048576</value>
<description>The Compressor threshold sets the level at which compression begins.</description>
</property>
{code}
And add client API so that user can set compression threshold per job.
{code}
setCompressionThreshold(int ct) // Set compression threshold in bytes.
{code}
> Compression Threshold
> ---------------------
>
> Key: HAMA-645
> URL: https://issues.apache.org/jira/browse/HAMA-645
> Project: Hama
> Issue Type: Improvement
> Components: bsp core
> Affects Versions: 0.5.0
> Reporter: Edward J. Yoon
> Assignee: Edward J. Yoon
> Fix For: 0.6.0
>
>
> I don't see much advantage to compression for small message bundles.
> Compress only when message bundle is larger than threshold.
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