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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2219) stop using code mapping for method names in the RPC
Date Mon, 15 Feb 2010 18:45:31 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12833919#action_12833919
] 

Jean-Daniel Cryans commented on HBASE-2219:
-------------------------------------------

WRT to the patch being sometimes faster, it's really a matter of timing of the splits and
region reassignments.

> stop using code mapping for method names in the RPC
> ---------------------------------------------------
>
>                 Key: HBASE-2219
>                 URL: https://issues.apache.org/jira/browse/HBASE-2219
>             Project: Hadoop HBase
>          Issue Type: Bug
>          Components: ipc
>    Affects Versions: 0.20.3
>            Reporter: ryan rawson
>            Priority: Blocker
>             Fix For: 0.21.0
>
>         Attachments: HBASE-2219-2.patch, HBASE-2219.patch
>
>
> since we use a sorted mapping of method names -> codes and send that over the wire,
even trivial changes, such as adding a new call, become wire-incompatible.  This means many
features which could easily have gone into a minor update must wait for a major update.  Eg:
2066, 1845, etc.
> This will increase on-wire overhead, but the compatibility is worth it I think.

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