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Posted to issues@ignite.apache.org by "Vladimir Ozerov (JIRA)" <ji...@apache.org> on 2016/12/22 08:29:58 UTC
[jira] [Resolved] (IGNITE-4097) Spilled map-reduce: map side.
[ https://issues.apache.org/jira/browse/IGNITE-4097?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vladimir Ozerov resolved IGNITE-4097.
-------------------------------------
Resolution: Won't Fix
Won't fix for now as it might incur unacceptable performance penalty.
> Spilled map-reduce: map side.
> -----------------------------
>
> Key: IGNITE-4097
> URL: https://issues.apache.org/jira/browse/IGNITE-4097
> Project: Ignite
> Issue Type: Sub-task
> Components: hadoop
> Affects Versions: 1.6
> Reporter: Ivan Veselovsky
> Assignee: Vladimir Ozerov
>
> Implement spilled output on Map side of map-reduce.
> In general, algorithm should follow the one used in Hadoop. The difference on the Map side is that
> 1) we use sorting collection (Hadoop sorts a range of map outputs explicitly);
> 2) we store the map output in files not using FileSystem , but rather local files.
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