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From "Brandon Williams (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4358) Delay Joining the ring until bootstrap and its compaction completes
Date Wed, 20 Jun 2012 15:47:42 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13397594#comment-13397594
] 

Brandon Williams commented on CASSANDRA-4358:
---------------------------------------------

bq. admittedly I haven't fully thought out if merging from multiple sources would still be
valid

Now that I've had my coffee: no, it's not.  But at least doing it for one source and throwing
the others into L0 would be a decent optimization.
                
> Delay Joining the ring until bootstrap and its compaction completes
> -------------------------------------------------------------------
>
>                 Key: CASSANDRA-4358
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4358
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 1.1.1, 1.2
>            Reporter: Vijay
>            Priority: Minor
>             Fix For: 1.2
>
>
> LCS adds a lot of small SST's while bootstrapping a node (after streaming), followed
by a large amount of compactions. 
> We might want to do the following to speedup the compaction and reduce the impact to
the incoming traffic:
> 1) Delay the node from joining the ring and wait until the node settles down with compactions.
> 2) Un-throttle the compactions and do it ASAP.
> 3) Once the node settles down we can enable thrift and join the ring.
> at the Least it might be better for us to avoid thrift traffic until the compaction completes.

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