ok, thanks for the hint Vadim, did not know that. On 28 October 2014 09:29, Vadim Kimlaychuk <[email protected]> wrote:
> Andrija, > > This is true for KVM hypevisor where you can choose how "similar" > hosts may be. In a case of In Huishan and XenServer different hosts may > even refuse to join server pool. I didn't try personally, but expect > problems especially if processor types are so different (like you mentioned > - Xeon vs AMD). > > Vadim. > > -----Original Message----- > From: Andrija Panic [mailto:[email protected]] > Sent: Tuesday, October 28, 2014 10:15 AM > To: [email protected] > Subject: Re: Enquiry on Citrix XenServer Installation for Cloudstack > > Hello In Huishan, > > yes, should be same or similar - if you have Xeon E5-2620, and on the > other you have Xeon E5-2650 - there is no much difference if at all, so > these might fit into 1 cluster. You need to be aware that the liver > migration functionality is cluster wide - so VM can be migrated between > hosts only inside 1 cluster. > Thah being said - it also depends what model of CPU do you expose to your > guest... > If you try to migrate an instance within the cluster, from one host with > Intel to other host with AMD - it will probably fail - so you put your > Intel hosts in 1 cluster, and AMD hosts in other, just as example. > Check the > > http://cloudstack-installation.readthedocs.org/en/latest/hypervisor/kvm.html#install-and-configure-the-agent > for CPU model, as this also might be usefull for you to understand cluster > placement.. > > btw, I have somewhat newer Xeon E5-2620 hosts and older E5xxx hosts in the > same cluster, but I do not expose CPU model specific flags to VMs (just > expose "qemu" CPU inside VM), so the live migration still works... > > On 28 October 2014 08:34, Vadim Kimlaychuk <[email protected]> > wrote: > > > Hello In Huishan, > > > > I think you should create multiple clusters and group you hosts by CPU > > type. Within once cluster hosts should be the same indeed. But who > > prohibits you to create multiple pods/clusters? Even if every host is > > unique :) > > > > Vadim. > > > > -----Original Message----- > > From: In Huishan [mailto:[email protected]] > > Sent: Tuesday, October 28, 2014 4:38 AM > > To: [email protected] > > Subject: Enquiry on Citrix XenServer Installation for Cloudstack > > > > Dear All, > > > > I read from the Cloudstack Installation Guide, that one of system > > requirements for XenServer hosts was: > > > > *All hosts within a cluster must be homogeneous. The CPUs must be of > > the same type, count, and feature flags.* > > > > However, if our hosts in XenServer pool are heterogeneous. Can we will > > use Xenserver as the hypervisor to run virtual machines in cloudstack? > > Just for your information, I am using Cloudstack version 4.4.1, is the > > system requirements still applicable to the new version? > > > > Look forward to all replies. > > > > Thanks > > > > Regards, > > Miss In > > > > > > -- > > Andrija Panić > -------------------------------------- > http://admintweets.com > -------------------------------------- > -- Andrija Panić -------------------------------------- http://admintweets.com --------------------------------------
