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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1432) Use Grizzly for Fetching Map Output in Shuffle
Date Mon, 11 Jun 2007 19:41:26 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12503583

Doug Cutting commented on HADOOP-1432:

bq. Some more experimentation needs to be done to make sure we are using the most appropriate
Grizzly APIs (in terms of performance) before this patch can go in.

Yes.  In particular, as a performance optimization, it should show a significant speedup.

If it works well, we should ideally could convert all our Jetty daemons to Grizzly.  Grizzly
supports the Servlet API, and we pre-compile all of our JSP pages to servlets, so that should
be possible.

> Use Grizzly for Fetching Map Output in Shuffle
> ----------------------------------------------
>                 Key: HADOOP-1432
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1432
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: mapred
>            Reporter: Tahir Hashmi
>            Assignee: Tahir Hashmi
>         Attachments: 1432.patch, grizzly.tgz
> As mentioned in HADOOP-1273 and references therefrom, Jetty 6 still doesn't seem to be
stable enough for use in Hadoop. Instead, we've decided to consider the usage of Grizzly Framework
[https://grizzly.dev.java.net/] for NIO based communication.

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