<div dir="ltr"><div>Could you please provide the volume-info output?<br><br></div>-Krutika<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jun 30, 2017 at 4:23 PM, <span dir="ltr"><<a href="mailto:gencer@gencgiyen.com" target="_blank">gencer@gencgiyen.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="HOEnZb"><div class="h5"><div link="#0563C1" vlink="#954F72" lang="TR"><div class="m_7067954990710812704WordSection1"><p class="MsoNormal">Hi,<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">I have an 2 nodes with 20 bricks in total (10+10).<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">First test: <u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">2 Nodes with Distributed – Striped – Replicated (2 x 2)<u></u><u></u></p><p class="MsoNormal">10GbE Speed between nodes<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">“dd” performance: 400mb/s and higher<u></u><u></u></p><p class="MsoNormal">Downloading a large file from internet and directly to the gluster: 250-300mb/s<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Now same test without Stripe but with sharding. This results are same when I set shard size 4MB or 32MB. (Again 2x Replica here)<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Dd performance: 70mb/s<u></u><u></u></p><p class="MsoNormal">Download directly to the gluster performance : 60mb/s<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Now, If we do this test twice at the same time (two dd or two doewnload at the same time) it goes below 25/mb each or slower.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">I thought sharding is at least equal or a little slower (maybe?) but these results are terribly slow.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">I tried tuning (cache, window-size etc..). Nothing helps.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">GlusterFS 3.11 and Debian 9 used. Kernel also tuned. Disks are “xfs” and 4TB each.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Is there any tweak/tuning out there to make it fast?<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Or is this an expected behavior? If its, It is unacceptable. So slow. I cannot use this on production as it is terribly slow. <u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">The reason behind I use shard instead of stripe is i would like to eleminate files that bigger than brick size.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Thanks,<u></u><u></u></p><p class="MsoNormal">Gencer.<u></u><u></u></p></div></div></div></div><br>______________________________<wbr>_________________<br>
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