<html><head></head><body><div>On Wed, 2018-05-09 at 18:26 +0000, Gandalf Corvotempesta wrote:</div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>Ok, some more question as I'm still planning our SDS (but I'm prone to use
LizardFS, gluster is too inflexible)
Let's assume a replica 3:
1) currently, is not possbile to add a single server and rebalance like any
order SDS (Ceph, Lizard, Moose, DRBD, ....), right ? In replica 3, I have
to add 3 new servers
</pre></blockquote><div><br></div><div>You can change the replica count. Add a fourth server, add it's brick to existing volume with gluster volume add-brick vol0 replica 4 newhost:/path/to/brick</div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>
2) The same should be by add disks on spare slots on existing servers.
Always a multiple of replica count, thus 1 disk per server
</pre></blockquote><div>yes</div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>
3) Can I grow the cluster by replacing 3 disks with bigger ones? In
example, with 12 2TB disks (on each server), I can replace 3 of them (1 per
server) with 4TB to get more space, right ? Or should I replace *all* disks
</pre></blockquote><div><br></div><div>I add space with new drives across all servers. So my replica 3 storage cluster gets a new person and new space: add 3 new drives, one per server, each drive is a new brick that is joined to create a replica 3 volume for that person. But if I need to expand the /home volume, then I add 3 drives, one per machine, then add each drive to the raid array on each machine for home.</div><div><br></div><div>You can also just add additional bricks to an existing volume (subject to normal replica count rules). </div><div><br></div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><pre>?
_______________________________________________
Gluster-users mailing list
<a href="mailto:Gluster-users@gluster.org">Gluster-users@gluster.org</a>
<a href="http://lists.gluster.org/mailman/listinfo/gluster-users">http://lists.gluster.org/mailman/listinfo/gluster-users</a>
</pre></blockquote><div><span><pre><pre>-- <br></pre>James P. Kinney III
Every time you stop a school, you will have to build a jail. What you
gain at one end you lose at the other. It's like feeding a dog on his
own tail. It won't fatten the dog.
- Speech 11/23/1900 Mark Twain
http://heretothereideas.blogspot.com/
</pre></span></div></body></html>