<div dir="auto"><div><br><div class="gmail_extra"><br><div class="gmail_quote">On 9 Feb 2017 6:02 pm, "Dr. Volker Jaenisch" <<a href="mailto:volker.jaenisch@inqbus.de">volker.jaenisch@inqbus.de</a>> wrote:<br type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi!<br>
<br>
I have two pairs of servers over the same 10 Gbit link:<br>
<br>
1) Pair A is replicating a 1TB Sata Disk using drbd8 (Debian Jessie 8.6).<br>
<br>
2) Pair B is replicating a 0.8TB Volume with an unterlying hardware Raid<br>
10 consisting out of 6 SAS Disks, Stripe 16k utilizing drbd9 (Kernel 4.4<br>
Proxmox)<br>
<br>
The server pair B should beat server pair A by at least by a factor of 3.<br></blockquote></div></div></div><div dir="auto"><br></div><div dir="auto"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"></blockquote></div></div></div><div dir="auto">Can't speak about drbd9 side but have you done a base benchmark of the disk throughput to actually prove that and eliminate any hardware issues or misconfiguration on the pair B?</div><div dir="auto"><br></div><div dir="auto"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
In case of a sync:<br>
<br>
* Pair A delivers a sync rate of 20 Mb/sec.<br>
<br>
* Pair B delivers a sync rate of 1 MB/sec<br>
<br>
Any ideas?<br>
<br>
Any help appreciated<br>
<font color="#888888"><br>
Volker<br>
<br>
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inqbus Scientific Computing Dr. Volker Jaenisch<br>
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86956 Schongau-West <a href="http://www.inqbus.de" rel="noreferrer" target="_blank">http://www.inqbus.de</a><br>
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