[PVE-User] Moving from XenServer to Proxmox... slowly

Kurt Bauer kurt.bauer at univie.ac.at
Thu Oct 24 16:48:04 CEST 2013



Gerald Brandt schrieb:
> ----- Original Message -----
>> From: "Kurt Bauer" <kurt.bauer at univie.ac.at>
>> To: "Gerald Brandt" <gbr at majentis.com>
>> Cc: pve-user at pve.proxmox.com
>> Sent: Thursday, October 24, 2013 9:18:58 AM
>> Subject: Re: [PVE-User] Moving from XenServer to Proxmox... slowly
>>
>>
>>
>> Gerald Brandt schrieb:
>
>>> Any performance issues?
>> In which regard?
>
> Noticable slowdowns/or speed ups on disk IO or memory, etc?

You mean going from XEN PVM to Proxmox, ie. KVM?
Hmm, to be honest we haven't done any speed or perfomance tests,
comparing the two. And besides changing the virtualisation
infrastructure, we also changed the storage infrastructure (from local
LVM to ceph) and all in all we didn't see any degradation of
performance, although this is more of a gut feeling than something I can
proof with figures and numbers.
>
>
>>> Gerald
>>>
>>>
>>> ----- Original Message -----
>>>> From: "Kurt Bauer" <kurt.bauer at univie.ac.at>
>>>> To: "Gerald Brandt" <gbr at majentis.com>
>>>> Cc: pve-user at pve.proxmox.com
>>>> Sent: Thursday, October 24, 2013 8:42:54 AM
>>>> Subject: Re: [PVE-User] Moving from XenServer to Proxmox... slowly
>>>>
>>>> Hi,
>>>>
>>>> we did pretty much the same thing over the past weeks, ie.
>>>> changing
>>>> fom
>>>> XEN to KVM (Proxmox) reusing the hardware already in place and
>>>> production. But we didn't went down the 2-Node cluster road, what
>>>> we
>>>> did
>>>> instead was, that we used an old server machine as a third node,
>>>> just
>>>> for the sake of quorum and not having to deal with all the
>>>> problems,
>>>> that may occur on a 2-Node cluster. No guests on that machine and
>>>> as
>>>> soon as the 3rd production machine was free, we added it to the
>>>> cluster
>>>> and removed the old one.
>>>> I guess performance is not an issue for that 3rd machine, as long
>>>> as
>>>> it
>>>> has no guests.
>>>>
>>>> Hope that helps a little,
>>>> best regards,
>>>> Kurt
>>>>
>>>> Gerald Brandt schrieb:
>>>>> Hi,
>>>>>
>>>>> We've pretty much made the decision to move from Citrix XenServer
>>>>> to KVM (Proxmox) for our Virtual solution.  Unfortunately, I
>>>>> don't
>>>>> have all the computers available to me at the start, since
>>>>> migration will use the existing XenServer computers.
>>>>>
>>>>> To start, I'll have two servers, using a single iSCSI, in an HA
>>>>> cluster.  Once they are running and some of the virtual machines
>>>>> are migrated, I can add a third server.  Finally, I can add the
>>>>> fourth server.
>>>>>
>>>>> Is there anything I need to look out for when creating the 2
>>>>> server
>>>>> HA cluster and then converting it to a 3 and 4 node cluster?
>>>>> Has anyone done this, and created a HOWTO I can follow?
>>>>>
>>>>> Thanks,
>>>>> Gerald
>>>>>
>>>>> ps: Been using Citrix XenServer since Jan 2009.  We've had enough
>>>>> issues with VM disk corruption to haunt me for year (using
>>>>> LVMoveriSCSI).  It's a bloody house of cards.
>>>>> _______________________________________________
>>>>> pve-user mailing list
>>>>> pve-user at pve.proxmox.com
>>>>> http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
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