[jira] [Comment Edited] (CASSANDRA-2698) Instrument repair to be able to assess it's efficiency (precision)

["Jason Wee (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-2698?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13405822#comment-13405822 ] 

Jason Wee edited comment on CASSANDRA-2698 at 7/3/12 11:52 AM:
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Hello, I've been using cassandra and develop client (hector) application to interfacing (crud) to the cassandra. It has been a great software and I would like to contribute back to cassandra and I've read 
http://wiki.apache.org/cassandra/HowToContribute 
which link me to 
https://issues.apache.org/jira/secure/IssueNavigator.jspa?reset=true&jqlQuery=project+%3D+12310865+AND+labels+%3D+lhf+AND+status+!%3D+resolved . Since this is a fresh for me, I'm not sure if this is a right place to start contributing and I hope you can response where and how should I able to contribute.
Thank you.
                
      was (Author: jasonwee):
    Hello, I've been using cassandra and develop client application to interfacing (crud) to the cassandra. It has been a great software and I would like to contribute back to cassandra and I've read 
http://wiki.apache.org/cassandra/HowToContribute 
which link me to 
https://issues.apache.org/jira/secure/IssueNavigator.jspa?reset=true&jqlQuery=project+%3D+12310865+AND+labels+%3D+lhf+AND+status+!%3D+resolved . Since this is a fresh for me, I'm not sure if this is a right place to start contributing and I hope you can response where and how should I able to contribute.
Thank you.
                  
> Instrument repair to be able to assess it's efficiency (precision)
> ------------------------------------------------------------------
>
>                 Key: CASSANDRA-2698
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2698
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Sylvain Lebresne
>            Priority: Minor
>              Labels: lhf
>
> Some reports indicate that repair sometime transfer huge amounts of data. One hypothesis is that the merkle tree precision may deteriorate too much at some data size. To check this hypothesis, it would be reasonably to gather statistic during the merkle tree building of how many rows each merkle tree range account for (and the size that this represent). It is probably an interesting statistic to have anyway.   

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