[Gluster-users] Proper procedure to reduce an active volume

[Nag Pavan Chilakam]

On Wed, 3 Feb 2021, 18:33 Diego Zuccato, <diego.zuccato at unibo.it> wrote:

> Hello all.
>
> What is the proper procedure to reduce a "replica 3 arbiter 1" volume?
>
Can you kindly elaborate the volume configuration.  Is this a plain arbiter
volume or is it a distributed arbiter volume?
Please share the volume info so that we can help you better

> The procedure I've found is:
> 1) # gluster volume remove-brick VOLNAME BRICK start
> (repeat for each brick to be removed, but being a r3a1 should I remove
> both bricks and the arbiter in a single command or multiple ones?)
>
No , you can mention bricks of a distributed subvolume in one command. If
you are having a 1x(2+1a) volume , then you should mention only one brick.
Start by removing the arbiter brick

> 2) # gluster volume remove-brick VOLNAME BRICK status
> (to monitor migration)
> 3) # gluster volume remove-brick VOLNAME BRICK commit
> (to finalize the removal)
> 4) umount and reformat the freed (now unused) bricks
> Is this safe?

What is the actual need to remove bricks?
If you feel this volume is not needed anymore , then just delete the
volume, instead of going through each brick deletion

>
> And once the bricks are removed I'll have to distribute arbiters across
> the current two data servers and a new one (currently I'm using a
> dedicated VM just for the arbiters). But that's another pie :)
>
> --
> Diego Zuccato
> DIFA - Dip. di Fisica e Astronomia
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