<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Sep 23, 2016 at 7:09 PM, Davide Ferrari <span dir="ltr"><<a href="mailto:davide@billymob.com" target="_blank">davide@billymob.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"><br><div class="gmail_extra"><br><div class="gmail_quote">2016-09-23 13:50 GMT+02:00 Sahina Bose <span dir="ltr"><<a href="mailto:sabose@redhat.com" target="_blank">sabose@redhat.com</a>></span>:<br><br></div><div class="gmail_quote">Ok, if I encounter again similiar problems I will post logs here<br><br></div><div class="gmail_quote"><span class=""><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex" class="gmail_quote"><div dir="ltr"><br><br><div class="gmail_extra">If you have additional capacity on the other 3 hosts , then yes, you can create a new gluster volume with a brick on the newly added 4th node and bricks from other nodes - this volume can be used as another storage domain. You are not doing anything wrong :) Keep in mind that all gluster volumes used as data storage domains should be replica 3 or replica 3 -arbiter to avoid split-brain and data loss issues.<br><br></div></div></blockquote><div><br></div></span><div>Mmmmh this is ringing an alarm bell then. So, it's basically impossible (or at least not supported) a 4 hosts configuration with all the 4 hosts having a data domain in a replica 2 fashion? Is it only replica 3 arbiter 1 the supported HA configuration? So if I want to expand storage (a part from adding disks to the same machines) I must add machines 3 by 3 ?<br><br></div><div>Currently I have 4 machines with 4 disks each in a RAID-10 configuration, exposed as one brick. Which is the best HA solution in this scenario then?<br></div></div></div></div></blockquote><div><br></div><div>You could do this - where Node3 & Node 2 also has arbiter bricks. Arbiter bricks only store metadata and requires very low storage capacity compared to the data bricks.<br></div><div><br></div><div>Node1 Node2 Node3 Node4 <br></div><div>brick1 brick1 arb-brick<br></div><div> arb-brick brick1 brick1<br><br><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div></div></div><br></div><div class="gmail_extra">Thanks<br clear="all"></div><span class=""><div class="gmail_extra"><br>-- <br><div><div dir="ltr"><div>Davide Ferrari<br></div>Senior Systems Engineer<br></div></div>
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