Gluster users - Mar 2012 - 3.3beta question: Can we drain a brick yet for removal?

This is an important bit of functionality, one we are running head first 
into.

Here''s the scenario:  You have N bricks in your system.  You want to 
reduce this by one (or more), and you have enough storage to shrink this.

Can we do something like a

	gluster volume decommission-brick volume_name brick1:/path1 ...

so that it starts moving data off the brick onto other bricks, and upon 
completion, it marks the brick as ready to be removed?

Assume this is a very useful use case.  Telling a user that they have 
mandatory down time (e.g. missing some files) to do this now is not a 
selling point.

Is this, or something very close to this in 3.3beta?

-- 
Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics Inc.
email: landman at scalableinformatics.com
web  : http://scalableinformatics.com
        http://scalableinformatics.com/sicluster
phone: +1 734 786 8423 x121
fax  : +1 866 888 3112
cell : +1 734 612 4615

Yes, that is the intended use case. We are ironing out details especially
when hardlinks exist on the decommissioning node. Any feedback on how this
works for you is most appreciated.

Avati

On Fri, Mar 16, 2012 at 8:35 PM, Joe Landman <
landman at scalableinformatics.com> wrote:
> This is an important bit of functionality, one we are running head first
> into.
>
> Here's the scenario:  You have N bricks in your system.  You want to
> reduce this by one (or more), and you have enough storage to shrink this.
>
> Can we do something like a
>
>        gluster volume decommission-brick volume_name brick1:/path1 ...
>
> so that it starts moving data off the brick onto other bricks, and upon
> completion, it marks the brick as ready to be removed?
>
> Assume this is a very useful use case.  Telling a user that they have
> mandatory down time (e.g. missing some files) to do this now is not a
> selling point.
>
> Is this, or something very close to this in 3.3beta?
>
> --
> Joseph Landman, Ph.D
> Founder and CEO
> Scalable Informatics Inc.
> email: landman at scalableinformatics.**com <landman at
scalableinformatics.com>
> web  : http://scalableinformatics.com
>      
http://scalableinformatics.**com/sicluster<http://scalableinformatics.com/sicluster>
> phone: +1 734 786 8423 x121
> fax  : +1 866 888 3112
> cell : +1 734 612 4615
>
> ______________________________**_________________
> Gluster-users mailing list
> Gluster-users at gluster.org
>
http://gluster.org/cgi-bin/**mailman/listinfo/gluster-users<http://gluster.org/cgi-bin/mailman/listinfo/gluster-users>
>
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