[Gluster-users] Question about heterogeneous bricks
nbalacha at redhat.com
Tue Feb 21 11:47:09 UTC 2017
Ideally, both bricks in a replica set should be of the same size.
Ravi, can you confirm?
On 21 February 2017 at 16:05, Daniele Antolini <lantuin at gmail.com> wrote:
> Hi Serkan,
> thanks a lot for the answer.
> So, if you are correct, in a distributed with replica environment the best
> practice is to pair nodes with the smallest size together?
> For example:
> node1 1 GB
> node2 10 GB
> node3 4 GB
> node4 8 GB
> node5 15 GB
> node6 7 GB
> node1 with node3 (smallest is 1 GB)
> node4 with node6 (smallest is 7 GB)
> node2 with node5 (smallest is 10 GB)
> The command to launch:
> gluster volume create gv0 replica 2 node1:/opt/data/gv0 node3:/opt/data/gv0
> node4:/opt/data/gv0 node6:/opt/data/gv0 node2:/opt/data/gv0
> Right? In this way I should have 18 GB of free space on the mounted volume
> (1 GB + 7 GB + 10 GB)
> 2017-02-21 11:30 GMT+01:00 Serkan Çoban <cobanserkan at gmail.com>:
>> I think, gluster1 and gluster2 became a replica pair. Smallest size
>> between them is affective size (1GB)
>> Same for gluster3 and gluster4 (3GB). Total 4GB space available. This
>> is just a guest though..
>> On Tue, Feb 21, 2017 at 1:18 PM, Daniele Antolini <lantuin at gmail.com>
>> > Hi all,
>> > first of all, nice to meet you. I'm new here and I'm subscribing to do a
>> > very simple question.
>> > I don't understand completely how, in a distributed with replica
>> > environment, heterogeneous bricks are involved.
>> > I've just done a test with four bricks:
>> > gluster1 1 GB
>> > gluster2 2 GB
>> > gluster3 5 GB
>> > gluster4 3 GB
>> > Each partition is mounted locally at /opt/data
>> > I've created a gluster volume with:
>> > gluster volume create gv0 replica 2 gluster1:/opt/data/gv0
>> > gluster2:/opt/data/gv0 gluster3:/opt/data/gv0 gluster4:/opt/data/gv0
>> > and then mounted on a client:
>> > testgfs1:/gv0 4,0G 65M 4,0G 2% /mnt/test
>> > I see 4 GB of free space but I cannot understand how this space has been
>> > allocated.
>> > Can please someone explain to me how this can happened?
>> > Thanks a lot
>> > Daniele
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