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https://issues.apache.org/jira/browse/CASSANDRA-6993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14241342#comment-14241342
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Joshua McKenzie commented on CASSANDRA-6993:
--------------------------------------------
Very good point. Looking through the code-base, every place where we're using
isUnix seems to really mean 'isn't Windows' so I'd be comfortable with that
distinction for now with the ability to make it more complex/powerful in the
future if necessary. Also, right now we're skipping early re-open on files
based on that check for FBUtilities.isUnix (see CASSANDRA-7365) so I'd prefer
to get this modification in before 2.1.3 so we can get more coverage / usage of
the early re-open logic, at least on OSX-based dev machines.
> 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
> Labels: Windows
> Fix For: 3.0, 2.1.3
>
> Attachments: 6993_2.1_v1.txt, 6993_v1.txt, 6993_v2.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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