accumulo-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Keith Turner (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-549) Create infrastructure that supports debugging.
Date Wed, 16 May 2012 15:07:03 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13276794#comment-13276794
] 

Keith Turner commented on ACCUMULO-549:
---------------------------------------

For comment 1 Eric made, I was thinking of walogs and was slightly confused.  I asked Eric
about this, he was thinking about indexing the log4j debug logs in parallel from each machine
in the cluster.
                
> Create infrastructure that supports debugging.
> ----------------------------------------------
>
>                 Key: ACCUMULO-549
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-549
>             Project: Accumulo
>          Issue Type: New Feature
>            Reporter: Keith Turner
>             Fix For: 1.5.0
>
>
> Before a release an extensive amount of testing is done that usually involves running
test like continuous ingest and random walk on a cluster for extended periods of time.  When
bugs are found by these test it can take a lot of time to track the issue down sometimes.
 Inorder to make tracking these issues down easier the write ahead logs are archived.  These
walogs archives make it possible to answer questions about a tablets history because everything
ever written to the metadata table is there.  It would be nice to always have this capability
on an accumulo system, and have it be easy to use.  Spelunking around in the write ahead logs
is not an easy task.  
> It would be nice if accumulo could answer questions like the following. 
>  
>  * Where has a tablet been assigned
>  * What compactions has a tablet done
>  * What split or merge created a tablet
> These questions can currently be answered with walogs and log4j logs, but its painful.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message