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.
On Feb 27, 2014 4:12 PM, "Marc Skinner" <marc at e-skinner.net> wrote:

> 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.
>
> It is a dedicated ISCSI server that serves 6 kvm hypervisors their shared
> VM storage.
>
>
>
>
> On 02/27/2014 12:51 PM, John Frisk wrote:
>
>> Try the LSI hardware RAID cards. Yes they are expensive but that is
>> hardware RAID. I personally use the 9266-8i series cards for my servers.
>> With 6 disk SATA-III RAID 10 ( 1+0 ) I can get about 350 MB/s
>> throughput. Zoom. :)
>>
>> On Feb 27, 2014 12:46 PM, "Carl Wilhelm Soderstrom"
>> <chrome at real-time.com <mailto:chrome at real-time.com>> wrote:
>>
>>     I find myself clueless about the state of hardware again.
>>
>>     It used to be that I recommended 3ware RAID controllers because:
>>
>>     1. they had good Linux drivers built into the kernel
>>     2. they were reliable
>>     3. they had a really good management tool suite under Linux
>>
>>     However, it looks like 3ware has abandoned the low-end RAID market
>>     and the
>>     cheapest controller of theirs which I find on Newegg is ~$440. Gone
>>     are the
>>     days of $120 2-port controllers for desktop use.
>>
>>     Does anyone have a recommendation for a hardware RAID controller to
>>     mirror
>>     drives for a desktop Linux box?
>>
>>     I really don't want to go back to the days of software RAID.
>>
>>     --
>>     Carl Soderstrom
>>     Systems Administrator
>>     Real-Time Enterprises
>>     www.real-time.com <http://www.real-time.com>
>>     _______________________________________________
>>     TCLUG Mailing List - Minneapolis/St. Paul, Minnesota
>>     tclug-list at mn-linux.org <mailto:tclug-list at mn-linux.org>
>>     http://mailman.mn-linux.org/mailman/listinfo/tclug-list
>>
>>
>>
>> _______________________________________________
>> TCLUG Mailing List - Minneapolis/St. Paul, Minnesota
>> tclug-list at mn-linux.org
>> http://mailman.mn-linux.org/mailman/listinfo/tclug-list
>>
>>
> _______________________________________________
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