IOPS limitation with XenServer as hypervisor

[Melanie Desaive]

Hi all,

do I get it right, that there is no way to limit IOPS per volume with
XenServer as hypervisor? (Using ACS 4.11)

I tried the settings to limit IO bandwidth and IOPS per volume on
hypervisor side with XenServer and only the bandwidth limitation seems
to have an effect. Seems to me, that this is not supported from the
XenServer side at all. Is that correct?

See:
https://bugs.xenserver.org/browse/XSO-580
https://github.com/xapi-project/blktap/issues/241

Are those features working with KVM?

Greetings, Melanie
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[Andrija Panic]

Hi Melanie,

with KVM it works (but I'm not aware of Xen atm) - you set upper limits for
number of bytes per sec and IOs per seconds for both read and writes, on
Disk Offering (and Compute offering) by defining HyperVisor QoS values.

Example for manual play:
https://fedoraproject.org/wiki/QA:Testcase_Virtualization_IO_Throttling

Cheers
Andrija

Post by Melanie Desaive
Hi all,
do I get it right, that there is no way to limit IOPS per volume with
XenServer as hypervisor? (Using ACS 4.11)
I tried the settings to limit IO bandwidth and IOPS per volume on
hypervisor side with XenServer and only the bandwidth limitation seems
to have an effect. Seems to me, that this is not supported from the
XenServer side at all. Is that correct?
https://bugs.xenserver.org/browse/XSO-580
https://github.com/xapi-project/blktap/issues/241
Are those features working with KVM?
Greetings, Melanie
--
--
Heinlein Support GmbH
Linux: Akademie - Support - Hosting
http://www.heinlein-support.de
Tel: 030 / 40 50 51 - 0
Fax: 030 / 40 50 51 - 19
HRB 93818 B / Amtsgericht Berlin-Charlottenburg,
GeschÀftsfÌhrer: Peer Heinlein -- Sitz: Berlin

[Yordan Kostov]

Hello Meanie,

That is true. XenServer does not support IOPS per volume. I did asked Citrix about a year ago about that. With the recent new features regarding storage (thin provisioning over shared block devices!) I really hope they will continue they focus on storage with the next release 8.0.

https://www.citrix.com/blogs/2018/10/03/major-platform-changes-to-xenserver-what-you-need-to-know/


Best regards,
Jordan

-----Original Message-----
From: Melanie Desaive [mailto:***@heinlein-support.de]
Sent: Monday, November 26, 2018 3:28 PM
To: users <***@cloudstack.apache.org>
Subject: IOPS limitation with XenServer as hypervisor

Hi all,

do I get it right, that there is no way to limit IOPS per volume with XenServer as hypervisor? (Using ACS 4.11)

I tried the settings to limit IO bandwidth and IOPS per volume on hypervisor side with XenServer and only the bandwidth limitation seems to have an effect. Seems to me, that this is not supported from the XenServer side at all. Is that correct?

See:
https://bugs.xenserver.org/browse/XSO-580
https://github.com/xapi-project/blktap/issues/241

Are those features working with KVM?

Greetings, Melanie
--
--
Heinlein Support GmbH
Linux: Akademie - Support - Hosting

http://www.heinlein-support.de
Tel: 030 / 40 50 51 - 0
Fax: 030 / 40 50 51 - 19

Zwangsangaben lt. §35a GmbHG:
HRB 93818 B / Amtsgericht Berlin-Charlottenburg,
Geschäftsführer: Peer Heinlein -- Sitz: Be