[Gluster-devel] [Gluster-users] Impact of force option in remove-brick

[ABHISHEK PALIWAL]

Ok thanks.

On Tue, Mar 22, 2016 at 12:45 PM, Atin Mukherjee <amukherj at redhat.com>
wrote:

>
>
> On 03/22/2016 12:42 PM, ABHISHEK PALIWAL wrote:
> >
> >
> > On Tue, Mar 22, 2016 at 12:38 PM, Atin Mukherjee <amukherj at redhat.com
> > <mailto:amukherj at redhat.com>> wrote:
> >
> >
> >
> >     On 03/22/2016 12:23 PM, ABHISHEK PALIWAL wrote:
> >     >
> >     > On Tue, Mar 22, 2016 at 12:14 PM, Gaurav Garg <ggarg at redhat.com
> <mailto:ggarg at redhat.com>
> >     > <mailto:ggarg at redhat.com <mailto:ggarg at redhat.com>>> wrote:
> >     >
> >     >     >> I just want to know what is the difference in the following
> >     scenario:
> >     >
> >     >     1. remove-brick without the force option
> >     >     2. remove-brick with the force option
> >     >
> >     >
> >     >     remove-brick without force option will perform task based on
> your
> >     >     option,
> >     >     for eg. remove-brick start option will start migration of file
> >     from
> >     >     given
> >     >     remove-brick to other available bricks in the cluster. you can
> >     check
> >     >     status
> >     >     of this remove-brick task by issuing remove-brick status
> command.
> >     >
> >     >     But remove-brick with force option will just forcefully remove
> >     brick
> >     >     from the cluster.
> >     >     It will result in data loss in case of distributed volume,
> because
> >     >     it will not migrate file
> >     >     from given remove-brick to other available bricks in the
> >     cluster. In
> >     >     case of replicate volume
> >     >     you might not have problem by doing remove-brick force because
> >     later
> >     >     on after adding brick you
> >     >     can issue heal command and migrate file from first replica set
> to
> >     >     this newly added brick.\
> >     >
> >     >
> >     > so when you are saying the forcefully remove the brick means it
> will
> >     > remove the brick even when
> >     > that brick is not available or available but have the different
> >     uuid of
> >     > peers, without generating any error?
> >     As I mentioned earlier it doesn't make sense to differentiate between
> >     these two behaviors until the UUID mismatch issue is resolved.
> >
> >
> > Yes, I agree. but how we can resolve that uuid mismatch issue is there
> > any way for the same in running system?
> I've explained the case why you are running into multiple UUIDs here [1].
>
> [1] http://www.gluster.org/pipermail/gluster-users/2016-March/025912.html
> >
> >     >
> >     >
> >     >     Thanks,
> >     >
> >     >     ~Gaurav
> >     >
> >     >     ----- Original Message -----
> >     >     From: "ABHISHEK PALIWAL" <abhishpaliwal at gmail.com <mailto:
> abhishpaliwal at gmail.com>
> >     >     <mailto:abhishpaliwal at gmail.com <mailto:
> abhishpaliwal at gmail.com>>>
> >     >     To: gluster-users at gluster.org <mailto:
> gluster-users at gluster.org>
> >     <mailto:gluster-users at gluster.org <mailto:gluster-users at gluster.org
> >>,
> >     >     gluster-devel at gluster.org <mailto:gluster-devel at gluster.org>
> >     <mailto:gluster-devel at gluster.org <mailto:gluster-devel at gluster.org
> >>
> >     >     Sent: Tuesday, March 22, 2016 11:35:52 AM
> >     >     Subject: [Gluster-users] Impact of force option in remove-brick
> >     >
> >     >     Hi Team,
> >     >
> >     >     I have the following scenario:
> >     >
> >     >     1. I have one replica 2 volume in which two brick are
> available.
> >     >     2. in such permutation and combination I got the UUID of peers
> mismatch.
> >     >     3. Because of UUID mismatch when I tried to remove brick on the
> >     >     second board I am getting the Incorrect Brick failure.
> >     >
> >     >     Now, I have the question if I am using the remove-brick
> command with
> >     >     the 'force' option it means it should remove the brick in any
> >     >     situation either the brick is available or its UUID is
> mismatch.
> >     >
> >     >     I just want to know what is the difference in the following
> scenario:
> >     >
> >     >     1. remove-brick without the force option
> >     >     2. remove-brick with the force option
> >     >
> >     >
> >     >     Regards
> >     >     Abhishek
> >     >
> >     >     _______________________________________________
> >     >     Gluster-users mailing list
> >     >     Gluster-users at gluster.org <mailto:Gluster-users at gluster.org>
> >     <mailto:Gluster-users at gluster.org <mailto:Gluster-users at gluster.org
> >>
> >     >     http://www.gluster.org/mailman/listinfo/gluster-users
> >     >
> >     >
> >     >
> >     >
> >     > --
> >     >
> >     >
> >     >
> >     >
> >     > Regards
> >     > Abhishek Paliwal
> >     >
> >     >
> >     > _______________________________________________
> >     > Gluster-users mailing list
> >     > Gluster-users at gluster.org <mailto:Gluster-users at gluster.org>
> >     > http://www.gluster.org/mailman/listinfo/gluster-users
> >     >
> >
> >
> >
> >
> > --
> >
> >
> >
> >
> > Regards
> > Abhishek Paliwal
>



-- 




Regards
Abhishek Paliwal
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