[Gluster-users] Question about heterogeneous bricks

[Nithya Balachandran]

Hi,

Ideally, both bricks in a replica set should be of the same size.

Ravi, can you confirm?

Regards,
Nithya

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
>
> So:
>
> 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
> node5:/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>
>> wrote:
>> > 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
>> >
>> >
>> >
>> >
>> > _______________________________________________
>> > Gluster-users mailing list
>> > Gluster-users at gluster.org
>> > http://lists.gluster.org/mailman/listinfo/gluster-users
>>
>
>
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