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Joshua McKenzie commented on CASSANDRA-4050:
--------------------------------------------
v3 attached. I removed the CommitLogTest changes that snuck on on the remove
skipBytes from MIS commit from you as they looked unrelated to this ticket.
> Rewrite RandomAccessReader to use FileChannel / nio to address Windows file
> access violations
> ---------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-4050
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4050
> Project: Cassandra
> Issue Type: Bug
> Environment: Windows 7
> Reporter: Jim Newsham
> Assignee: Joshua McKenzie
> Priority: Minor
> Attachments: CASSANDRA-4050_v1.patch, CASSANDRA-4050_v2.patch,
> CASSANDRA-4050_v3.patch
>
>
> On Windows w/older java I/O libraries the files are not opened with
> FILE_SHARE_DELETE. This causes problems as hard-links cannot be deleted
> while the original file is opened - our snapshots are a big problem in
> particular. The nio library and FileChannels open with FILE_SHARE_DELETE
> which should help remedy this problem.
> Original text:
> I'm using Cassandra 1.0.8, on Windows 7. When I take a snapshot of the
> database, I find that I am unable to delete the snapshot directory (i.e., dir
> named "{datadir}\{keyspacename}\snapshots\{snapshottag}") while Cassandra is
> running: "The action can't be completed because the folder or a file in it
> is open in another program. Close the folder or file and try again" [in
> Windows Explorer]. If I terminate Cassandra, then I can delete the directory
> with no problem.
> I expect to be able to move or delete the snapshotted files while Cassandra
> is running, as this should not affect the runtime operation of Cassandra.
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