[Gluster-devel] Server-side Quiesce feature

Varun Shastry vshastry at redhat.com
Thu Feb 6 13:57:04 UTC 2014

Hi all,

The name of the feature changed to 'Barrier' in order to avoid the 
confusion between the 'Quiesce' translator.

A much detailed version of the document is updated here 
All comments/suggestions/critics on both document and the feature is 

Varun Shastry

On Friday 31 January 2014 04:57 PM, Varun Shastry wrote:
> Hi all,
> Volume snapshot feature snapshots a volume by snapshotting individual 
> bricks, that are available, using the lvm-snapshot technology. As part 
> of using lvm-snapshot, the design requires bricks to be free from 
> modifications. Snapshot feature needs a mechanism in GlusterFS, where 
> file operations such as write, mkdir, mkdnod, unlink, truncate etc, 
> that modify the underlying file system, are 'quiesced' until the 
> snapshot of the brick is taken.
> This mechanism should have the following properties:
> . Allow file operations that do not modify the underlying file system.
> . Should keep the 'quiescing' transparent to the applications.
> This is where the server-side quiescing of file operations comes into 
> picture. So the feature page[1] for Server side Quiesce is created in 
> the gluster.org. Please review the document & design of the feature 
> and provide your comments/suggestions/critics.
> [1] 
> http://www.gluster.org/community/documentation/index.php/Features/Server-side_Quiesce_feature
> Thanks
> Varun Shastry
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> Gluster-devel at nongnu.org
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