[Gluster-devel] glusterfs file locking

[kane]

Hi Raghavendra,

	What I want to do is to take volume snapshots with btrfs, so I need the volume locked. 
When snapshot is taking, all handles(IO,  gluster cli) except snap hung on.

As I know, the xlator lock does not lock the whole volume bricks, but only a range of a file in bricks.

Any good advice?

Thanks,
Kane

在 2013年12月3日，下午12:06，Raghavendra Gowdappa <rgowdapp at redhat.com> 写道：

> Hi Kane,
> 
> You don't have to add the xlator explicitly through cli. The xlator is configured by default on bricks when you create a volume.
> 
> regards,
> Raghavendra.
> 
> ----- Original Message -----
>> From: "kane" <stef_9k at 163.com>
>> To: rxsingh at gmail.com
>> Cc: gluster-devel at nongnu.org
>> Sent: Tuesday, December 3, 2013 8:41:30 AM
>> Subject: [Gluster-devel] glusterfs file locking
>> 
>> Hi, Rohit:
>> 
>> 	I have googled the issue you mailed last year as below:
>> ======
>> Does Gluster provide POSIX compatible file locking transparently with
>> multiple clients simultaneously trying to lock files on a Gluster share
>> with the native Gluster client?
>> 
>> A lot of the code in our application framework relies on file locking for
>> synchronization. I was running across some errors, and wanted to rule out
>> file locking issues – hence this question.
>> 
>> The gluster documentation mentions a features/posix-locks translator that
>> should be used for distributed file level locking. This translator can be
>> added using the config files as shown in the example at
>> 
>> http://gluster.org/community/documentation/index.php/Translators/features/locks.
>> 
>> However, this method of using config files doesn't seem to be available in
>> newer versions of Gluster, and I couldn't find an equivalent way of using
>> this translator using the command line.  Can someone confirm if I need to
>> use this translator, and how I could enable it with Gluster 3.3?
>> ======
>> 
>> so as I meet this file locking usage in 3.3 too, I want to ask you what did
>> you
>> deal with the lock issue at last, did the xlator lock useful?
>> 
>> Thanks,
>> Kane
>> 
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