Re: [Xen-users] XCP - Maximum CPU cores

[Outback Dingo <outbackdingo@xxxxxxxxx>]

I built and installed XEN 4.1 on the XCP platform, and rebooted, it loaded but none of the SRs appeared available

so VMs wouldnt start, i then rebooted back into "stock" with the 3.4.2, and the xapi wouldnt even run, so it appears

I tired to rebuild the API to no avail hoping maybe then the SR issues would be forgiven

at this point im at XCP 1.0 with the 4.1 in a booted but unusable state

also kinda curious what the next "devel" drop will be ready and if itll be at 4.1 by then, ive got a few CPU heavy boxes

which are really not useable to capacity at the moment, so crossing fingers for someone with knowledge to pitch in with

pointers

On Thu, Apr 14, 2011 at 3:48 PM, Dustin Marquess <dmarquess@xxxxxxxxx> wrote:

I'm having the same issue myself. However I'm trying to stay as close
to 'stock' XCP 1.0 as possible, since I need stability.

I have the 2 source ISOs & even the xen-api.hg Mercurial repo cloned.
However, I'm not sure which piece of XCP I need to recompile.  Is it
just the hypervisor kernel itself (eg, /boot/xen-3.4.2.gz), or the
dom0 kernel, or the entire xapi?

The build instructions @
http://wiki.xen.org/xenwiki/XCP_Building_Instructions just show how to
rebuild xapi itself, not the entire XCP platform, sadly.

-Dustin

On Tue, Mar 8, 2011 at 11:51 AM, Todd Deshane <todd.deshane@xxxxxxx> wrote:
> On Tue, Mar 8, 2011 at 2:46 PM, AP Xen <apxeng@xxxxxxxxx> wrote:
>> Technically, it is possible as XCP is open source. You would have to
>> download the source ISO and rebuild Xen with nr_phys_cpus=128. Trying to
>> replace Xen in XCP with the Xen 4.x might be more difficult.
>>
>
> True it is open source and should be possible. You're going to want to
> make sure you use at least the 4.1 branch as it has better libxl
> integration.
>
> Do report any problems that you find to xen-devel. I think the
> intention is that this should work, I'm just not sure how much
> community testing we have gotten to this point. Do let us know if/when
> you test it and how you progress.
>
> Thanks,
> Todd
>
>
>>
>>
>> From: Outback Dingo [mailto:outbackdingo@xxxxxxxxx]
>> Sent: Tuesday, March 08, 2011 11:08 AM
>> To: Todd Deshane
>> Cc: AP Xen; Tapas Mishra; xen-users; Boris Quiroz
>>
>> Subject: Re: [Xen-users] XCP - Maximum CPU cores
>>
>>
>>
>> well, i need 128 cores now on XCP :( so im hardware heavy and cant utilize
>> 3/4 my cores on 2 systems, so how can one compensates for this
>>
>> is it possible to use xen 4.x on XCP 1.0 ?
>>
>> On Tue, Mar 8, 2011 at 1:42 PM, Todd Deshane <todd.deshane@xxxxxxx> wrote:
>>
>> On Tue, Mar 8, 2011 at 6:32 PM, AP Xen <apxeng@xxxxxxxxx> wrote:
>>> It is called max_phys_cpus=<nr>
>>>
>>> http://xenbits.xensource.com/xen-unstable.hg/rev/d7cbcf5d7cd6
>>>
>>>
>>>
>>> BTW, the default is 128 for Xen 4.x
>>>
>>
>> Just FYI, the plan will be to move to Xen 4.1+ starting with XCP 1.1
>>
>> We do also plan to track xen-unstable with an XCP unstable version as
>> well. More to come on this.
>>
>> Thanks,
>> Todd
>>
>>>
>>>
>>> Thanks,
>>>
>>> AP
>>>
>>>
>>>
>>> From: Tapas Mishra [mailto:mightydreams@xxxxxxxxx]
>>> Sent: Tuesday, March 08, 2011 10:03 AM
>>> To: xen-users
>>> Cc: AP Xen; Boris Quiroz; Outback Dingo
>>>
>>> Subject: Re: [Xen-users] XCP - Maximum CPU cores
>>>
>>>
>>>
>>> Hi please elaborate as how the compilation method of hypervisor can
>>> enhance
>>> the number of CPU's to be pinned.
>>>
>>>
>>>
>>> On Tue, Mar 8, 2011 at 11:24 PM, AP Xen <apxeng@xxxxxxxxx> wrote:
>>>
>>> The default is 32, however you can up the limit to 64 with a compile time
>>> option. So, It depends on how the hypervisor was compiled.
>>>
>>> Thanks,
>>> AP
>>>
>>>> -----Original Message-----
>>>> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-
>>>> bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Boris Quiroz
>>>> Sent: Tuesday, March 08, 2011 6:04 AM
>>>> To: Outback Dingo
>>>> Cc: xen-users
>>>> Subject: Re: [Xen-users] XCP - Maximum CPU cores
>>>>
>>>> 2011/3/8 Outback Dingo <outbackdingo@xxxxxxxxx>:
>>>> > Whats the maximum cpu cores XCP will see ?
>>>> > _______________________________________________
>>>> > Xen-users mailing list
>>>> > Xen-users@xxxxxxxxxxxxxxxxxxx
>>>> > http://lists.xensource.com/xen-users
>>>> >
>>>>
>>>> Somewhere I read they were 32 cores maximum. I'm checking..
>>>>
>>>> Cheers.
>>>>
>>>> --
>>>> @cereal_bars
>>>>
>>>> _______________________________________________
>>>> Xen-users mailing list
>>>> Xen-users@xxxxxxxxxxxxxxxxxxx
>>>> http://lists.xensource.com/xen-users
>>>
>>>
>>> _______________________________________________
>>> Xen-users mailing list
>>> Xen-users@xxxxxxxxxxxxxxxxxxx
>>> http://lists.xensource.com/xen-users
>>>
>>>
>>> --
>>> http://mightydreams.blogspot.com
>>>
>>> _______________________________________________
>>> Xen-users mailing list
>>> Xen-users@xxxxxxxxxxxxxxxxxxx
>>> http://lists.xensource.com/xen-users
>>>
>>
>>
>> --
>> Todd Deshane
>> http://www.linkedin.com/in/deshantm
>> http://www.xen.org/products/cloudxen.html
>>
>>
>
>
>
> --
> Todd Deshane
> http://www.linkedin.com/in/deshantm
> http://www.xen.org/products/cloudxen.html
>
> _______________________________________________
> Xen-users mailing list
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> http://lists.xensource.com/xen-users
>

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