[Gluster-users] [Gluster-devel] Appending time to snap name in USS

[Poornima Gurusiddaiah]

Yes, the creation time of the snap is appended to the snapname dynamically, 
i.e. snapview-server takes the snaplist from glusterd, and while populating the dentry for the ".snaps" it appends the time. 

Thanks, 
Poornima 

----- Original Message -----

> From: "Anand Avati" <avati at gluster.org>
> To: "Poornima Gurusiddaiah" <pgurusid at redhat.com>, "Gluster Devel"
> <gluster-devel at gluster.org>, "gluster-users" <gluster-users at gluster.org>
> Sent: Friday, January 9, 2015 1:49:02 AM
> Subject: Re: [Gluster-devel] Appending time to snap name in USS

> It would be convenient if the time is appended to the snap name on the fly
> (when receiving list of snap names from glusterd?) so that the timezone
> application can be dynamic (which is what users would expect).

> Thanks

> On Thu Jan 08 2015 at 3:21:15 AM Poornima Gurusiddaiah < pgurusid at redhat.com
> > wrote:

> > Hi,
> 

> > Windows has a feature called shadow copy. This is widely used by all
> 
> > windows users to view the previous versions of a file.
> 
> > For shadow copy to work with glusterfs backend, the problem was that
> 
> > the clients expect snapshots to contain some format
> 
> > of time in their name.
> 

> > After evaluating the possible ways(asking the user to create
> 
> > snapshot with some format of time in it and have rename snapshot
> 
> > for existing snapshots) the following method seemed simpler.
> 

> > If the USS is enabled, then the creation time of the snapshot is
> 
> > appended to the snapname and is listed in the .snaps directory.
> 
> > The actual name of the snapshot is left unmodified. i.e. the snapshot
> 
> > list/info/restore etc. commands work with the original snapname.
> 
> > The patch for the same can be found @ http://review.gluster.org/#/c/9371/
> 

> > The impact is that, the users would see the snapnames to be different in
> > the
> > ".snaps" folder
> 
> > than what they have created. Also the current patch does not take care of
> > the
> > scenario where
> 
> > the snapname already has time in its name.
> 

> > Eg:
> 
> > Without this patch:
> 
> > drwxr-xr-x 4 root root 110 Dec 26 04:14 snap1
> 
> > drwxr-xr-x 4 root root 110 Dec 26 04:14 snap2
> 

> > With this patch
> 
> > drwxr-xr-x 4 root root 110 Dec 26 04:14 snap1 at GMT-2014.12.30-05.07.50
> 
> > drwxr-xr-x 4 root root 110 Dec 26 04:14 snap2 at GMT-2014.12.30-23.49.02
> 

> > Please let me know if you have any suggestions or concerns on the same.
> 

> > Thanks,
> 
> > Poornima
> 
> > ______________________________ _________________
> 
> > Gluster-devel mailing list
> 
> > Gluster-devel at gluster.org
> 
> > http://www.gluster.org/ mailman/listinfo/gluster-devel
> 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.gluster.org/pipermail/gluster-users/attachments/20150109/68fcb469/attachment.html>