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From "Sanjay Radia (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7557) Make IPC header be extensible
Date Wed, 12 Oct 2011 20:35:12 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13126122#comment-13126122
] 

Sanjay Radia commented on HADOOP-7557:
--------------------------------------

I personally prefer to use PB for protocols - so i agree with you Todd.
My main motivation for  pluggability is for transitions across fundamental protocol changes.
Once we go to PB I doubt if we will need change unless we find a flaw. Pluggability does provide
an option for inter-operating with 20.

I feel that adding a  field to "hrpc" header mentioned in my previous comment allows Hadoop
RPC library to be used by *other* projects with a different serialization; I understood this
to be one of Doug's motivation. From a pure protocol layering point of view having a field
for the protocol at the next layer does make sense.
                
> Make  IPC  header be extensible
> -------------------------------
>
>                 Key: HADOOP-7557
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7557
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Sanjay Radia
>            Assignee: Sanjay Radia
>         Attachments: HADOOP-7557.patch, IpcHeader.proto, ipcHeader1.patch, ipcHeader2.patch
>
>


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