<div dir="ltr">Hello!<div class="gmail_extra"><br><div class="gmail_quote">On Thu, Oct 5, 2017 at 12:21 AM, Bryan Sockel <span dir="ltr"><<a href="mailto:Bryan.Sockel@altn.com" target="_blank">Bryan.Sockel@altn.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)">Is there any performance loss from your if your gluster replica 3 servers are not all the same configuration?</div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)"> </div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)"> </div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)">Server 1 - Primary </div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)">16 X 1.2 TB 10k Drives - Raid 10 - Stripe 256k (2.5 Drives)</div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)">1 CPU - Intel(R) Xeon(R) CPU E5-2609 v3 @ 1.90GHz</div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)">64 GB Memory</div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)"> </div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)">Server 2 - Replica</div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)">8 X 6 TB 7.5 RPM Drives - Raid 10 - Trip 512 (3.5)</div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)">1 CPU - Intel(R) Xeon(R) CPU E5-2609 v3 @ 1.90GHz</div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)">16 GB Memory</div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)"> </div></div></blockquote><div><br></div><div>As gluster needs to copy each 'write' operation twice and it waits for actual completion of every op, your write iops will be limited by the slowest drive.</div><div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)">Server 3 - Arbiter (Also Virtual machine node)</div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)">2 X 1.2 TB 10k Drives Raid 10 </div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)">2 CPU - Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz</div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)">192 GB Memory</div>
<div style="font-family:Tahoma;color:rgb(0,0,0);font-size:13.3333px;font-weight:400;font-style:normal;background:none 0% 0%/auto repeat scroll padding-box border-box rgba(0,0,0,0)"> </div></div></blockquote><div><br></div><div>But it will be relaxed for the arbiter node, as arbiter keeps no data, therefore no writes* happens on it, so it doesn't impacts overall performance</div><div><br></div><div><br></div><div>* There are actually some metadata updates on the arbiter node, which are, obviously, write operations, but we can neglect them.</div></div></div></div>