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From "Joshua McKenzie (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-6993) Windows: remove mmap'ed I/O for index files and force standard file access
Date Tue, 22 Apr 2014 15:20:15 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-6993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13976900#comment-13976900
] 

Joshua McKenzie commented on CASSANDRA-6993:
--------------------------------------------

Good call on the final.

I also agree on the logic - I simply re-factored the existing logic and took its correctness
at face-value since it was already committed into the code-base.

I'll clean these two things up and post a revised patch - thanks for the feedback.

> Windows: remove mmap'ed I/O for index files and force standard file access
> --------------------------------------------------------------------------
>
>                 Key: CASSANDRA-6993
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6993
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Joshua McKenzie
>            Assignee: Joshua McKenzie
>            Priority: Minor
>             Fix For: 3.0
>
>         Attachments: 6993_v1.txt
>
>
> Memory-mapped I/O on Windows causes issues with hard-links; we're unable to delete hard-links
to open files with memory-mapped segments even using nio.  We'll need to push for close to
performance parity between mmap'ed I/O and buffered going forward as the buffered / compressed
path offers other benefits.



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