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From Tyler Hobbs <ty...@datastax.com>
Subject Re: snapshot files locked
Date Wed, 14 Mar 2012 20:17:28 GMT
Can you open a ticket on
https://issues.apache.org/jira/browse/CASSANDRAfor this?

On Wed, Mar 14, 2012 at 3:04 PM, Jim Newsham <jnewsham@referentia.com>wrote:

>
> Hi Maki,
>
> Thanks for the reply.  Yes, I understand that snapshots are hard links.
>  However, my understanding is that removing any hard-linked files just
> removes the link (decrementing the link counter of the file on disk) -- it
> does not delete the file itself nor remove any other links which may be
> pointing at the file.  To confirm my understanding, I tested this in
> Windows by terminating Cassandra and then deleting all files in the
> snapshot dir.  None of the corresponding files in the parent keyspace
> directory were removed.
>
> Regards,
> Jim
>
>
> On 3/13/2012 9:29 PM, Maki Watanabe wrote:
>
>> snapshot files are "hardlink"s of the original sstables.
>> As you know, on windows, you can't delete files opened by other process.
>> If you try to delete the "hardlink", windows thinks you try to delete
>> the sstables in production.
>>
>> maki
>>
>> 2012/3/14 Jim Newsham<jnewsham@referentia.**com <jnewsham@referentia.com>
>> >:
>>
>>> Hi,
>>>
>>> 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".  If I terminate Cassandra, then I can delete the directory with
>>> no
>>> problem.  Is there a reason why Cassandra must hold onto these files?
>>>
>>> Thanks,
>>> Jim
>>>
>>>
>


-- 
Tyler Hobbs
DataStax <http://datastax.com/>

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