andreas at hastexo
Jul 26, 2012, 1:01 AM
Post #11 of 11
On 07/24/2012 11:46 AM, Phil Stricker wrote:
Re: Slow Reads on VM - Xenserver and DRBD
[In reply to]
> I think, I am seing two different Problems of which one is isolated:
> - Slow performance in a VM
> The issue seams to be related to different OSs: In a Debian-VM, I am getting nearly full speed of the drbd-block-device , in a CentOS 5.8 VM, I can only see 10% of that speed.
You are using paravirtualized drivers in the VM?
> - Slow overall performance of the raid-array:
> I cannot reach more than 450 MB/s on the array (LSI 9260-4i, 8x Intel 320 160 GB SSD). I see 450 MB/s in a Raid10 setting and I see 450MB/s in a Raid0 test setting. That is crazy!
You already shared your drbd configuration? ... and the controller has a
Need help with DRBD?
> Did you ever see that behaviour?
> Best wishes,
>> -----Original Message-----
>> From: ff [at] mpexnet [mailto:drbd-user-bounces [at] lists] On
>> Behalf Of Felix Frank
>> Sent: Tuesday, July 24, 2012 11:17 AM
>> To: Christian Balzer
>> Cc: drbd-user [at] lists
>> Subject: Re: [DRBD-user] Slow Reads on VM - Xenserver and DRBD
>> On 07/24/2012 11:11 AM, Christian Balzer wrote:
>>> Yeah, I've read the same thing and am leaning towards KVM for a fully
>>> virtualized system, though Vserver and (in the future) LXC work for
>>> 90% of the requirements I have.
>> Seconded. Linux vServer + DRBD make for a robust HA setup at very good
>> performance. A vserver RA for pacemaker is floating through the web.
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