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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-2975) IPC server should not allocate a buffer for each request
Date Thu, 05 Jun 2008 00:03:45 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-2975?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hairong Kuang updated HADOOP-2975:
----------------------------------

    Status: Open  (was: Patch Available)

Ankur, I am canceling this patch for now. I will do some experiments on large scale clusters.
After I get the experimental data, let's decide which option is the best. I hope that this
works for you.

> IPC server should not allocate a buffer for each request
> --------------------------------------------------------
>
>                 Key: HADOOP-2975
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2975
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: ipc
>    Affects Versions: 0.16.0
>            Reporter: Hairong Kuang
>            Assignee: Ankur
>         Attachments: Hadoop-2975-v1.patch, Hadoop-2975-v2.patch, Hadoop-2975-v3.patch
>
>
> Currently the IPC server allocates a buffer for each incoming request. The buffer is
thrown away after the request is serialized. This leads to very inefficient heap utilization.
It would be nicer if all requests from one connection could share a same common buffer since
the ipc server has only one request is being read from a socket at a time.

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