[ovirt-users] Re: HCI with 5 node quest
Usually it is best practice to have the cluster expanded by a multiple of '3'
because the gluster volume is of type 'replica 3' or 'replica 3 arbiter
1'. Such volumes can only be expanded by 3 bricks and the best practice is to have one
node per brick.
Yet, the linux world gives freedom , so you can use 5 nodes like this:
nodeA - data, volume1
nodeB - data ,volume1
nodeC - arbiter, volume1 ; arbiter , volume2
nodeD - data, volume2
nodeE - data, volume2
Best Regards,
Strahil Nikolov
В неделя, 1 ноември 2020 г., 23:12:21 Гринуич+2, Simon Scott <simon(a)justconnect.ie>
написа:
Apologies Strahill,
I don’t think my question was very clear - my fault.
In all the documentation on HCI that I’ve read, it clearly states the the 3 node HCI model
can only be expanded in multiples of 3 nodes, i.e. 3, 6, 9, 12.
I don’t know if I missed a basic explanation somewhere but is there any reason I can’t
have a 5 node cluster with multiple Gluster Replica 3 volumes utilising any of the 5 nodes
in the same Gluster Peer Group?
Kind Regards
Shimme
> On 1 Nov 2020, at 17:17, Strahil Nikolov <hunter86_bg(a)yahoo.com> wrote:
>
> We do not know.
> Nodes 3,4,5 need to be in the same gluster network like 1,2,3 .
> Once you create your bricks (inode size >= 512) and mount them permanently, you
can create an extra volume or expand the current volumes.
>
> Once you have prepared the nodes, you can add them from UI.
>
> Best Regards,
> Strahil Nikolov
>
>
>
>
>
>
> В неделя, 1 ноември 2020 г., 12:44:40 Гринуич+2, simon(a)justconnect.ie
<simon(a)justconnect.ie> написа:
>
>
>
>
>
> I have a 3 node HCI setup with 2 Replica 3 volumes using nodes 1, 2 & 3 and have
added 2 additional Compute nodes to this Cluster.
>
> What is stopping me from adding nodes 4 & 5 as Gluster Peers and creating a
glusterfs Replica 3 Volume using nodes 3, 4 & 5?
>
>
> Shimme
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