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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4050) cassandra unnecessarily holds file locks on snapshot files
Date Sat, 06 Oct 2012 04:08:03 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13470901#comment-13470901
] 

Jonathan Ellis commented on CASSANDRA-4050:
-------------------------------------------

Right, so NTFS is locking the underlying data since the "original" sstable is still open in
Cassandra, so the behavior described by Jim applies.  We'd have to add a workaround like the
one given on superuser.com -- move the links to a "garbage" location to clean up on restart.

This is pretty low priority for me but I'd be glad to point someone interested in the right
direction.
                
> cassandra unnecessarily holds file locks on snapshot files
> ----------------------------------------------------------
>
>                 Key: CASSANDRA-4050
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4050
>             Project: Cassandra
>          Issue Type: Bug
>         Environment: Windows 7
>            Reporter: Jim Newsham
>            Priority: Minor
>
> 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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