On Wed, 3 Feb 2021, 18:33 Diego Zuccato, <diego.zuccato@xxxxxxxx> 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
Servizi Informatici
Alma Mater Studiorum - Università di Bologna
V.le Berti-Pichat 6/2 - 40127 Bologna - Italy
tel.: +39 051 20 95786
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