-Atin Sent from one plus one On 29-Mar-2016 10:43 pm, "Russell Purinton" <[email protected]> wrote: > > I have used the add-brick command in the past but I’m not sure how to go about using it to do this… > > Could anyone provide an example? > > As shown below, the current setup, xs141 is replica with xs138. xs139 is replica with xs140. I would like to have 139 serve as arbiter for 141 and 138. And I’d like 141 to serve as arbiter for 139 and 140.
I don't think that's possible. IIRC, the last brick in the replica pair is considered to be an arbiter brick and I am not aware of any changes in the behaviour post that. So in short, if you execute add-brick then all the new bricks will be considered as arbiter IMO. Ravi can correct me otherwise. > >> On Mar 29, 2016, at 1:07 PM, Atin Mukherjee <[email protected]> wrote: >> >> -Atin >> Sent from one plus one >> On 29-Mar-2016 10:21 pm, "Russell Purinton" <[email protected]> wrote: >> > >> > I have several existing volumes configured in the following way: >> > >> > Volume Name: sonic001 >> > Type: Distributed-Replicate >> > Volume ID: 362eb3a8-c211-4f35-bcd3-87785c51f15c >> > Status: Started >> > Number of Bricks: 4 x 2 = 8 >> > Transport-type: tcp >> > Bricks: >> > Brick1: xs141:/brick1/sonic001p0r0 >> > Brick2: xs138:/brick1/sonic001p0r1 >> > Brick3: xs139:/brick1/sonic001p1r0 >> > Brick4: xs140:/brick1/sonic001p1r1 >> > Brick5: xs141:/brick0/sonic001p2r0 >> > Brick6: xs138:/brick0/sonic001p2r1 >> > Brick7: xs139:/brick0/sonic001p4r0 >> > Brick8: xs140:/brick0/sonic001p3r1 >> > >> > I recently learned that replica 2 can’t be considered HA because of the split brain scenario that would occur if a network partition occurred. I also recently learned that using replica 3 arbiter 1 was a way to solve this problem without consuming additional space. >> > >> > Is there a way I can change this existing volume to be replica 3 arbiter 1, or do I need to create new volumes and rsync the data? >> >> I think you should be able to convert the volume topology using add-brick command. >> >> > >> > Thanks, >> > >> > Russ >> > >> > _______________________________________________ >> > Gluster-users mailing list >> > [email protected] >> > http://www.gluster.org/mailman/listinfo/gluster-users >> >> -Atin >> Sent from one plus one > >
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