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Posted to commits@cassandra.apache.org by "Jonathan Ellis (Commented) (JIRA)" <ji...@apache.org> on 2012/02/17 18:35:59 UTC
[jira] [Commented] (CASSANDRA-3930) CommitLogSegment uses
RandomAccessFile which doesnt have fadvice
[ https://issues.apache.org/jira/browse/CASSANDRA-3930?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13210398#comment-13210398 ]
Jonathan Ellis commented on CASSANDRA-3930:
-------------------------------------------
CASSANDRA-3578 has some patches that mean commitlog i/o may not be strictly sequential.
> CommitLogSegment uses RandomAccessFile which doesnt have fadvice
> ----------------------------------------------------------------
>
> Key: CASSANDRA-3930
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3930
> Project: Cassandra
> Issue Type: Improvement
> Affects Versions: 1.0.7
> Reporter: Vijay
> Assignee: Vijay
> Priority: Minor
> Fix For: 1.1.1, 1.2
>
>
> Wondering if we even need MMap file in this case as it is always sequential.
> If yes, we need it we might want to replace
> logFileAccessor = new RandomAccessFile(logFile, "rw");
> to
> logFileAccessor = SequentialWriter.open(logFile, true);
> in CommitLogSegment
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