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Date: Thu, 6 Aug 2015 14:35:06 +0000 (UTC)
From: "Aleksey Yeschenko (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
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Subject: [jira] [Commented] (CASSANDRA-7237) Optimize batchlog manager to
 avoid full scans
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    [ https://issues.apache.org/jira/browse/CASSANDRA-7237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14660097#comment-14660097 ] 

Aleksey Yeschenko commented on CASSANDRA-7237:
----------------------------------------------

Thanks. Everything looks good. Committed as {{762db474273f764b189d3613fce33943cd64701b}} to cassandra-3.0 and merged into trunk.

> Optimize batchlog manager to avoid full scans
> ---------------------------------------------
>
>                 Key: CASSANDRA-7237
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7237
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Aleksey Yeschenko
>            Assignee: Branimir Lambov
>            Priority: Minor
>             Fix For: 3.0.0 rc1
>
>
> Now that we use time-UUIDs for batchlog ids, and given that w/ local strategy the partitions are ordered in time-order here, we can optimize the scanning by limiting the range to replay taking the last replayed batch's id as the beginning of the range, and uuid(now+timeout) as its end.


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