On 05/31/2012 01:46 PM, Anthony Xu wrote:
Hi Clayton,
You are right, 8 host is a rule of thumb, 16 is hard limitation.
Cloudstack uses XAPI to communicate with XenServer Pool, CloudStack uses XAPI
much more heavily than user uses XAPI though XenCenter/CLI,
Which includes some regular XAPI call, like VM state Sync,
We found if there are more than 8 host in a pool, it may cause XenServer host
slow.
It is a rule of thumb, which assumes you want to run more than ~200 VM on this
XenServer pool.
If you want to run big VM, the number of VMs in the XenServer pool is less than
100, I think you can add more host into a pool.
Thanks,
Anthony
-----Original Message-----
From: Clayton Weise [mailto:cwe...@iswest.net]
Sent: Thursday, May 31, 2012 9:21 AM
To: 'cloudstack-dev@incubator.apache.org'; 'cloudstack-
us...@incubator.apache.org'
Subject: RE: 8 Xen hosts limitations
Somebody from Citrix/CloudStack can correct me here but as I understand
it 8 is a rule of thumb and not a strict law. That being said,
XenServer (and XCP) are limited to 16 hosts per resource pool -- and
that _is_ a hard limit. Other limits are available from here:
http://www.citrix.com/site/resources/dynamic/salesdocs/Citrix_XenServer
_6_Configuration_Limits.pdf
-Clayton
-----Original Message-----
From: Lucas Hughes [mailto:lucas.hug...@ecommerce.com]
Sent: Thursday, May 31, 2012 8:16 AM
To: cloudstack-us...@incubator.apache.org; cloudstack-
d...@incubator.apache.org
Subject: 8 Xen hosts limitations
Hello,
I see in the install docs that it says not to use more than 8 Xen hosts
in one pool. I am wondering why this is the case because as a test I
added 10 hosts to a pool and Cloudstack is managing them without any
issues that I see. Any further clarification on this issue would be
greatly appreciated.
--
Lucas Hughes
Cloud Engineer
Ecommerce Inc
Thanks to all for the clarification.
--
Lucas Hughes
Cloud Engineer
Ecommerce Inc
