Gluster users - Nov 2024 - Add an arbiter when have multiple bricks at same server.

Your add-brick command adds 2 bricks 1 arbiter (even though you name
them all arbiter!)

The sequence is important:

gluster v add-brick VMS replica 2 arbiter 1 gluster1:/gv0 gluster2:/gv0
arbiter1:/arb1

adds two data bricks and a corresponding arbiter from 3 different
servers and 3 different disks,?
thus you can loose any one server OR any one disk and stay up and
consistent.

adding more bricks to the volume you can follow the pattern.

A.

Am Dienstag, dem 05.11.2024 um 12:51 -0300 schrieb Gilberto
Ferreira:
> Hi there.
> 
> In previous emails, I comment with you guys, about 2 node gluster
> server, where the bricks lay down in different size and folders in
> the same server, like
> 
> gluster vol create VMS replica 2 gluster1:/disco2TB-0/vms
> gluster2:/disco2TB-0/vms gluster1:/disco1TB-0/vms gluster2:/disco1TB-
> 0/vms gluster1:/disco1TB-1/vms gluster2:/disco1TB-1/vms
> 
> So I went ahead and installed a Debian 12 and installed the same
> gluster version that the other servers, which is now 11.1 or
> something like that.
> In this new server, I have a small disk like 480G in size.
> And I created 3 partitions?formatted?with XFS using?imaxpct=75, as
> suggested in previous emails.
> 
> And than in the gluster nodes, I tried to add the brick
> gluster vol add-brick VMS replica 3 arbiter 1
> arbiter:/arbiter1/arbiter1 arbiter:/arbiter2/arbiter2
> arbiter:/arbiter3/arbiter3
> 
> But to my surprise (or not!) I got this message:
> volume add-brick: failed: Multiple bricks of a replicate volume are
> present on the same server. This setup is not optimal. Bricks should
> be on different nodes to have best fault tolerant co
> nfiguration. Use 'force' at the end of the command if you want to
> override this behavior. 
> 
> Why is that?
> 
> ?
> 
> 
> 
> 
> ---
> 
> 
> Gilberto Nunes Ferreira
> 
> 
> 
> 
> ________
> 
> 
> 
> Community Meeting Calendar:
> 
> Schedule -
> Every 2nd and 4th Tuesday at 14:30 IST / 09:00 UTC
> Bridge: https://meet.google.com/cpu-eiue-hvk
> Gluster-users mailing list
> Gluster-users at gluster.org
> https://lists.gluster.org/mailman/listinfo/gluster-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.gluster.org/pipermail/gluster-users/attachments/20241105/7827a407/attachment.html>

Ok.
I got confused here!
For each brick I will need one arbiter brick, in a different
partition/folder?
And what if in some point in the future I decide to add a new brick in the
main servers?
Do I need to provide another partition/folder in the arbiter and then
adjust the arbiter brick counter?

---


Gilberto Nunes Ferreira






Em ter., 5 de nov. de 2024 ?s 13:22, Andreas Schwibbe <a.schwibbe at
gmx.net>
escreveu:
> Your add-brick command adds 2 bricks 1 arbiter (even though you name them
> all arbiter!)
>
> The sequence is important:
>
> gluster v add-brick VMS replica 2 arbiter 1 gluster1:/gv0 gluster2:/gv0
> arbiter1:/arb1
>
> adds two data bricks and a corresponding arbiter from 3 different servers
> and 3 different disks,
> thus you can loose any one server OR any one disk and stay up and
> consistent.
>
> adding more bricks to the volume you can follow the pattern.
>
> A.
>
> Am Dienstag, dem 05.11.2024 um 12:51 -0300 schrieb Gilberto Ferreira:
>
> Hi there.
>
> In previous emails, I comment with you guys, about 2 node gluster server,
> where the bricks lay down in different size and folders in the same server,
> like
>
> gluster vol create VMS replica 2 gluster1:/disco2TB-0/vms
> gluster2:/disco2TB-0/vms gluster1:/disco1TB-0/vms gluster2:/disco1TB-0/vms
> gluster1:/disco1TB-1/vms gluster2:/disco1TB-1/vms
>
> So I went ahead and installed a Debian 12 and installed the same gluster
> version that the other servers, which is now 11.1 or something like that.
> In this new server, I have a small disk like 480G in size.
> And I created 3 partitions formatted with XFS using imaxpct=75, as
> suggested in previous emails.
>
> And than in the gluster nodes, I tried to add the brick
> gluster vol add-brick VMS replica 3 arbiter 1 arbiter:/arbiter1/arbiter1
> arbiter:/arbiter2/arbiter2 arbiter:/arbiter3/arbiter3
>
> But to my surprise (or not!) I got this message:
> volume add-brick: failed: Multiple bricks of a replicate volume are
> present on the same server. This setup is not optimal. Bricks should be on
> different nodes to have best fault tolerant co
> nfiguration. Use 'force' at the end of the command if you want to
override
> this behavior.
>
> Why is that?
>
>
>
>
>
>
> ---
>
>
> Gilberto Nunes Ferreira
>
>
>
>
> ________
>
>
>
> Community Meeting Calendar:
>
> Schedule -
> Every 2nd and 4th Tuesday at 14:30 IST / 09:00 UTC
> Bridge: https://meet.google.com/cpu-eiue-hvk
> Gluster-users mailing list
> Gluster-users at gluster.org
> https://lists.gluster.org/mailman/listinfo/gluster-users
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.gluster.org/pipermail/gluster-users/attachments/20241105/b38cc190/attachment.html>