<p dir="ltr">Yep I get about the same speed as you Marc on single file access testing per VM. It goes down for me a bit since I believe I am hitting CPU wait with 24 VMs running. :) I doubt disk RAID controller is the bottleneck at that point.</p>
<div class="gmail_quote">On Feb 27, 2014 4:12 PM, "Marc Skinner" <<a href="mailto:marc@e-skinner.net">marc@e-skinner.net</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I'm getting 415-430 MB/s with a Raid 10 SATA-III with 6 disks with mdadm. RHEL 6.5, on a AMD FX-6 core.<br>
<br>
It is a dedicated ISCSI server that serves 6 kvm hypervisors their shared VM storage.<br>
<br>
<br>
<br>
<br>
On 02/27/2014 12:51 PM, John Frisk wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Try the LSI hardware RAID cards. Yes they are expensive but that is<br>
hardware RAID. I personally use the 9266-8i series cards for my servers.<br>
With 6 disk SATA-III RAID 10 ( 1+0 ) I can get about 350 MB/s<br>
throughput. Zoom. :)<br>
<br>
On Feb 27, 2014 12:46 PM, "Carl Wilhelm Soderstrom"<br>
<<a href="mailto:chrome@real-time.com" target="_blank">chrome@real-time.com</a> <mailto:<a href="mailto:chrome@real-time.com" target="_blank">chrome@real-time.com</a>>> wrote:<br>
<br>
I find myself clueless about the state of hardware again.<br>
<br>
It used to be that I recommended 3ware RAID controllers because:<br>
<br>
1. they had good Linux drivers built into the kernel<br>
2. they were reliable<br>
3. they had a really good management tool suite under Linux<br>
<br>
However, it looks like 3ware has abandoned the low-end RAID market<br>
and the<br>
cheapest controller of theirs which I find on Newegg is ~$440. Gone<br>
are the<br>
days of $120 2-port controllers for desktop use.<br>
<br>
Does anyone have a recommendation for a hardware RAID controller to<br>
mirror<br>
drives for a desktop Linux box?<br>
<br>
I really don't want to go back to the days of software RAID.<br>
<br>
--<br>
Carl Soderstrom<br>
Systems Administrator<br>
Real-Time Enterprises<br>
<a href="http://www.real-time.com" target="_blank">www.real-time.com</a> <<a href="http://www.real-time.com" target="_blank">http://www.real-time.com</a>><br>
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