<div dir="ltr"><div><div>Hey Ludwig,<br><br></div>Yes this configuration is fine. You can add them and do the rebalance after that.<br><br></div><div>FYI: Replica 2 volumes are prone to split-brains. Replica 3 or arbiter will highly reduce the possibility of ending up in split-brains.<br></div><div>If possible consider using one of those configurations. For more information go through [1].<br><br>[1] <a href="https://gluster.readthedocs.io/en/latest/Administrator%20Guide/Split%20brain%20and%20ways%20to%20deal%20with%20it/" target="_blank">https://gluster.readthedocs.<wbr>io/en/latest/Administrator%<wbr>20Guide/Split%20brain%20and%<wbr>20ways%20to%20deal%20with%<wbr>20it/</a><br><br>Thanks & Regards,<br></div>Karthik<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Sep 26, 2017 at 12:48 AM, Ludwig Gamache <span dir="ltr"><<a href="mailto:ludwig@elementai.com" target="_blank">ludwig@elementai.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Sharding is not enabled.<div><br></div><div>Ludwig</div></div><div class="gmail_extra"><div><div class="h5"><br><div class="gmail_quote">On Mon, Sep 25, 2017 at 2:34 PM, <span dir="ltr"><<a href="mailto:lemonnierk@ulrar.net" target="_blank">lemonnierk@ulrar.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Do you have sharding enabled ? If yes, don't do it.<br>
If no I'll let someone who knows better answer you :)<br>
<div><div class="m_913814056672159346h5"><br>
On Mon, Sep 25, 2017 at 02:27:13PM -0400, Ludwig Gamache wrote:<br>
> All,<br>
><br>
> We currently have a Gluster installation which is made of 2 servers. Each<br>
> server has 10 drives on ZFS. And I have a gluster mirror between these 2.<br>
><br>
> The current config looks like:<br>
> SERVER A-BRICK 1 replicated to SERVER B-BRICK 1<br>
><br>
> I now need to add more space and a third server. Before I do the changes, I<br>
> want to know if this is a supported config. By adding a third server, I<br>
> simply want to distribute the load. I don't want to add extra redundancy.<br>
><br>
> In the end, I want to have the following done:<br>
> Add a peer to the cluster<br>
> Add 2 bricks to the cluster (one on server A and one on SERVER C) to the<br>
> existing volume<br>
> Add 2 bricks to the cluster (one on server B and one on SERVER C) to the<br>
> existing volume<br>
> After that, I need to rebalance all the data between the bricks...<br>
><br>
> Is this config supported? Is there something I should be careful before I<br>
> do this? SHould I do a rebalancing before I add the 3 set of disks?<br>
><br>
> Regards,<br>
><br>
><br>
> Ludwig<br>
<br>
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