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From "Dean Hiller (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5335) need ability to switch to LCS node by node
Date Tue, 12 Mar 2013 13:09:13 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13600015#comment-13600015
] 

Dean Hiller commented on CASSANDRA-5335:
----------------------------------------

that was supposed to read "brought it to it's knees" not "needs"
                
> need ability to switch to LCS node by node
> ------------------------------------------
>
>                 Key: CASSANDRA-5335
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5335
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 1.2.2
>         Environment: linux, cassandra 1.2.2
>            Reporter: Dean Hiller
>              Labels: compaction
>
> when we switched to LCS, nearly all the servers started rewriting their file structure.
 We need a way to switch just one node so we can slowly roll out a huge change like this.
 doing the whole cluster brought it to it's needs and we tried nodetool stop compaction on
some nodes but that did not help at all.  We had to really wait overnight for all LCS to finish.

> We had also tried nodetool setcompactionthroughput 1 which also had no effect and performance
was still pretty bad.  Ideally, none of this would be a problem if we were just doing one
node as we would just pull the node back out while it was converting to LCS.

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