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Posted to dev@hama.apache.org by "Thomas Jungblut (Updated) (JIRA)" <ji...@apache.org> on 2011/10/19 21:11:10 UTC
[jira] [Updated] (HAMA-458) Add Combiners
[ https://issues.apache.org/jira/browse/HAMA-458?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Thomas Jungblut updated HAMA-458:
---------------------------------
Description:
We have spoken about it on the mailing list:
http://www.mail-archive.com/hama-dev@incubator.apache.org/msg05540.html
Small extract:
{quote}
When should the combiner be called and in which form. In MapReduce they
are plain reducers, so we can have the same model but not grouped by a key
rather than the class name of the message.
{quote}
Especially if we could collect all task data on the same host and combine them. This would yield into better performance.
We need a smart idea.
was:
We have spoken about it on the mailing list:
http://www.mail-archive.com/hama-dev@incubator.apache.org/msg05540.html
Small extract:
{quote}
E.g: when should the combiner be called and in which form. In MapReduce they
are plain reducers, so we can have the same model but not grouped by a key
rather than the class name of the message.
{quote}
Especially if we could collect all task data on the same host and combine them. This would yield into better performance.
We need a smart idea.
Fix Version/s: (was: 0.5.0)
> Add Combiners
> -------------
>
> Key: HAMA-458
> URL: https://issues.apache.org/jira/browse/HAMA-458
> Project: Hama
> Issue Type: New Feature
> Reporter: Thomas Jungblut
>
> We have spoken about it on the mailing list:
> http://www.mail-archive.com/hama-dev@incubator.apache.org/msg05540.html
> Small extract:
> {quote}
> When should the combiner be called and in which form. In MapReduce they
> are plain reducers, so we can have the same model but not grouped by a key
> rather than the class name of the message.
> {quote}
> Especially if we could collect all task data on the same host and combine them. This would yield into better performance.
> We need a smart idea.
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