[Gluster-users] Adding larger bricks to an existing volume

Nithya Balachandran nbalacha at redhat.com
Fri Dec 29 03:52:19 UTC 2017

Hi Mark,

On 28 December 2017 at 23:56, Mark Connor <markconnor64 at gmail.com> wrote:

> I have a 10x2 distributed replica volume running gluster3.8.
> Each of my bricks is about 60TB in size. ( 6TB drives Raid 6 10+2 )
> I am running of storage so I intend on adding servers with larger 8Tb
> drives.
> My new bricks will be 80TB in size. I will make sure the replica to the
> larger brick will match in size.
> Will gluster place more files on the larger bricks? Or will I have wasted
> space?

Yes, it will. Gluster will use the sizes of the bricks when calculating the
layout distribution if cluster.weighted-rebalance is enabled.
There was a bug [1] which was fixed in 3.8.5 so anything newer than that
should work.

On a different note, I am looking into improving Gluster documentation so
where would you like to see this information in the guides?


[1] https://bugzilla.redhat.com/show_bug.cgi?id=1374135

> In other words will the 80TB new bricks ever exceed 60TB?
> -Mark
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