Thank you so much Ravi, very helpful ! On Tue, Apr 16, 2019, 12:11 Ravishankar N <ravishan...@redhat.com> wrote:
> > On 16/04/19 2:20 PM, Sahina Bose wrote: > > On Tue, Apr 16, 2019 at 1:39 PM Leo David <leoa...@gmail.com> > <leoa...@gmail.com> wrote: > > > Hi Everyone, > I have wrongly configured the main gluster volume ( 12 identical 1tb ssd > disks, replica 3 distributed-replicated, across 6 nodes - 2 per node ) with > arbiter one. > Oviously I am wasting storage space in this scenario with the arbiter bricks, > and I would like to convert the volume to non-arbitrated one, so having all > the data evenly spreaded across all the disks. > Considering the the storage is being used by about 40 vms in production, what > would it be the steps, or is there any chance to change the volume type to > non-arbitrated on the fly and then rebalance ? > Thank you very much ! > > > Ravi, can you help here - to change from arbiter to replica 3? > > The general steps are: > > 1. Ensure there are no pending heals. > > 2. Use the `remove-brick` command to reduce the volume to a replica 2 > > 3. Use the `add-brick` command to convert it to a replica 3. > > 4. Monitor and check that the heal is eventually completed on the newly > added bricks. > > The steps are best done when the VMs are offline so that self-heal traffic > does not eat up too much of I/O traffic. > > Example: > [root@tuxpad ravi]# gluster volume info > > Volume Name: testvol > Type: Distributed-Replicate > Volume ID: e3fc6ea5-a48c-4918-8a4b-0a7859f3a182 > Status: Started > Snapshot Count: 0 > Number of Bricks: 2 x (2 + 1) = 6 > Transport-type: tcp > Bricks: > Brick1: 127.0.0.2:/home/ravi/bricks/brick1 > Brick2: 127.0.0.2:/home/ravi/bricks/brick2 > Brick3: 127.0.0.2:/home/ravi/bricks/brick3 (arbiter) > Brick4: 127.0.0.2:/home/ravi/bricks/brick4 > Brick5: 127.0.0.2:/home/ravi/bricks/brick5 > Brick6: 127.0.0.2:/home/ravi/bricks/brick6 (arbiter) > Options Reconfigured: > transport.address-family: inet > nfs.disable: on > performance.client-io-threads: off > [root@tuxpad ravi]# > > [root@tuxpad ravi]# gluster volume heal testvol info > Brick 127.0.0.2:/home/ravi/bricks/brick1 > Status: Connected > Number of entries: 0 > > Brick 127.0.0.2:/home/ravi/bricks/brick2 > Status: Connected > Number of entries: 0 > > Brick 127.0.0.2:/home/ravi/bricks/brick3 > Status: Connected > Number of entries: 0 > > Brick 127.0.0.2:/home/ravi/bricks/brick4 > Status: Connected > Number of entries: 0 > > Brick 127.0.0.2:/home/ravi/bricks/brick5 > Status: Connected > Number of entries: 0 > > Brick 127.0.0.2:/home/ravi/bricks/brick6 > Status: Connected > Number of entries: 0 > > [root@tuxpad ravi]# > [root@tuxpad ravi]# gluster volume remove-brick testvol replica 2 > 127.0.0.2:/home/ravi/bricks/brick3 127.0.0.2:/home/ravi/bricks/brick6 > force > Removing brick(s) can result in data loss. Do you want to Continue? (y/n) y > volume remove-brick commit force: success > [root@tuxpad ravi]# > [root@tuxpad ravi]# gluster volume info > > Volume Name: testvol > Type: Distributed-Replicate > Volume ID: e3fc6ea5-a48c-4918-8a4b-0a7859f3a182 > Status: Started > Snapshot Count: 0 > Number of Bricks: 2 x 2 = 4 > Transport-type: tcp > Bricks: > Brick1: 127.0.0.2:/home/ravi/bricks/brick1 > Brick2: 127.0.0.2:/home/ravi/bricks/brick2 > Brick3: 127.0.0.2:/home/ravi/bricks/brick4 > Brick4: 127.0.0.2:/home/ravi/bricks/brick5 > Options Reconfigured: > transport.address-family: inet > nfs.disable: on > performance.client-io-threads: off > [root@tuxpad ravi]# > [root@tuxpad ravi]# gluster volume add-brick testvol replica 3 > 127.0.0.2:/home/ravi/bricks/brick3_new > 127.0.0.2:/home/ravi/bricks/brick6_new > volume add-brick: success > [root@tuxpad ravi]# > [root@tuxpad ravi]# > [root@tuxpad ravi]# gluster volume info > > Volume Name: testvol > Type: Distributed-Replicate > Volume ID: e3fc6ea5-a48c-4918-8a4b-0a7859f3a182 > Status: Started > Snapshot Count: 0 > Number of Bricks: 2 x 3 = 6 > Transport-type: tcp > Bricks: > Brick1: 127.0.0.2:/home/ravi/bricks/brick1 > Brick2: 127.0.0.2:/home/ravi/bricks/brick2 > Brick3: 127.0.0.2:/home/ravi/bricks/brick3_new > Brick4: 127.0.0.2:/home/ravi/bricks/brick4 > Brick5: 127.0.0.2:/home/ravi/bricks/brick5 > Brick6: 127.0.0.2:/home/ravi/bricks/brick6_new > Options Reconfigured: > transport.address-family: inet > nfs.disable: on > performance.client-io-threads: off > [root@tuxpad ravi]# > [root@tuxpad ravi]# > [root@tuxpad ravi]# gluster volume heal testvol info > Brick 127.0.0.2:/home/ravi/bricks/brick1 > Status: Connected > Number of entries: 0 > > Brick 127.0.0.2:/home/ravi/bricks/brick2 > Status: Connected > Number of entries: 0 > > Brick 127.0.0.2:/home/ravi/bricks/brick3_new > Status: Connected > Number of entries: 0 > > Brick 127.0.0.2:/home/ravi/bricks/brick4 > Status: Connected > Number of entries: 0 > > Brick 127.0.0.2:/home/ravi/bricks/brick5 > Status: Connected > Number of entries: 0 > > Brick 127.0.0.2:/home/ravi/bricks/brick6_new > Status: Connected > Number of entries: 0 > > > HTH, > Ravi > > > > _______________________________________________ > Users mailing list -- users@ovirt.org > To unsubscribe send an email to users-le...@ovirt.org > Privacy Statement: https://www.ovirt.org/site/privacy-policy/ > oVirt Code of Conduct: > https://www.ovirt.org/community/about/community-guidelines/ > List Archives: > https://lists.ovirt.org/archives/list/users@ovirt.org/message/UBEZWN35M365IKCIE3U6TRHDDX7TS75T/ > >
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