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From "stack (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4070) [Coprocessors] Improve region server metrics to report loaded coprocessors to master
Date Tue, 25 Oct 2011 03:46:32 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4070?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13134734#comment-13134734

stack commented on HBASE-4070:

Here was my last comment on the patch over on RB in response to Eugene's "Hi Michael, As Ted
mentioned, HServerInfo is deprecated (per https://issues.apache.org/jira/browse/HBASE-1502)":

Michael Stack 5 days, 4 hours ago (October 19th, 2011, 11:34 p.m.)  
Yes but that is not reason to shoe horn it in elsewhere (smile).

There is another server attribute that is currently without a home (webuiport) and I think
there are other a bunch of server attrbutes -- as opposed to server load -- that servers might
export and have aggregated over in the master and/or used calculating cluster balance and
the like.

We could let this patch go in as is or we could build the server attributes mechanism -- ServerInfoV2
or json in regionserver znode, etc. -- and put stuff like this in there.

I think it a little perverse passing loaded coprocessors as part of HServerLoad.  I opened
HBASE-4660 to address it.
> [Coprocessors] Improve region server metrics to report loaded coprocessors to master
> ------------------------------------------------------------------------------------
>                 Key: HBASE-4070
>                 URL: https://issues.apache.org/jira/browse/HBASE-4070
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.90.3
>            Reporter: Mingjie Lai
>            Assignee: Eugene Koontz
>             Fix For: 0.92.0, 0.94.0
>         Attachments: HBASE-4070.patch, HBASE-4070.patch, HBASE-4070.patch, HBASE-4070.patch,
master-web-ui.jpg, rs-status-web-ui.jpg
> HBASE-3512 is about listing loaded cp classes at shell. To make it more generic, we need
a way to report this piece of information from region to master (or just at region server
level). So later on, we can display the loaded class names at shell as well as web console.

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