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From Alex Huang <Alex.Hu...@citrix.com>
Subject RE: [PROPOSAL] Raise cluster size limit to 16 on VMware
Date Tue, 08 Jan 2013 18:27:56 GMT
These are technical limits imposed by hypervisors.  

Admins exercise their options by limiting how many hosts they add to a cluster. 

--Alex

> -----Original Message-----
> From: Hari Kannan [mailto:hari.kannan@citrix.com]
> Sent: Tuesday, January 08, 2013 9:57 AM
> To: cloudstack-dev@incubator.apache.org
> Subject: RE: [PROPOSAL] Raise cluster size limit to 16 on VMware
> 
> Hi Alex, maybe, I misunderstood - I thought the admin provides these values
> - so, how are these values seeded?
> 
> Hari
> 
> -----Original Message-----
> From: Alex Huang [mailto:Alex.Huang@citrix.com]
> Sent: Tuesday, January 8, 2013 9:54 AM
> To: cloudstack-dev@incubator.apache.org
> Subject: RE: [PROPOSAL] Raise cluster size limit to 16 on VMware
> 
> Koushik,
> 
> I believe what you pointed out there is the maximum limit for the hypervisor.
> 
> Hari,
> 
> What's the point of the admin setting these values?  Afterall, he's the one
> who's adding hosts himself?  If he wants more, why should cs stop him?
> 
> --Alex
> 
> > -----Original Message-----
> > From: Hari Kannan [mailto:hari.kannan@citrix.com]
> > Sent: Tuesday, January 08, 2013 9:44 AM
> > To: cloudstack-dev@incubator.apache.org
> > Subject: RE: [PROPOSAL] Raise cluster size limit to 16 on VMware
> >
> > Hi Koushik,
> >
> > Can you please elaborate
> >
> > a) how the admin gets to set this value?
> > b) is this value set on a per cluster basis? If so, what is the default value?
> >
> > Hari
> >
> > -----Original Message-----
> > From: Koushik Das [mailto:koushik.das@citrix.com]
> > Sent: Monday, January 7, 2013 4:57 AM
> > To: cloudstack-dev@incubator.apache.org
> > Subject: RE: [PROPOSAL] Raise cluster size limit to 16 on VMware
> >
> > Didn't see any feedback, so am assuming that the approach seems
> > reasonable. I will go ahead and start with the implementation. Not
> > planning to write a FS as this is a small feature and the below mail
> summarizes it.
> >
> > -Koushik
> >
> > > -----Original Message-----
> > > From: Koushik Das [mailto:koushik.das@citrix.com]
> > > Sent: Thursday, January 03, 2013 5:26 PM
> > > To: cloudstack-dev@incubator.apache.org
> > > Subject: RE: [PROPOSAL] Raise cluster size limit to 16 on VMware
> > >
> > > So based on the discussions would it be fair to conclude that this
> > > should be handled by adding some column like 'max_host_per_cluster'
> > > in hypervisor_capabilities table. Currently the following version
> > > entries are present for Vmware. For each version an appropriate
> > > value can be associated based on the limitations/actual supported.
> > > For other HVs where this setting is not applicable some dummy value,
> > > say (-1) can be
> > entered.
> > >
> > > hv_type	hv_version
> > > VMware	default
> > > VMware	4.0
> > > VMware	4.1
> > > VMware	5.0
> > >
> > > Let me know if there is a consensus on this.
> > >
> > > Thanks,
> > > Koushik
> > >
> > > > -----Original Message-----
> > > > From: Alex Huang [mailto:Alex.Huang@citrix.com]
> > > > Sent: Thursday, December 20, 2012 10:08 PM
> > > > To: cloudstack-dev@incubator.apache.org
> > > > Subject: RE: [PROPOSAL] Raise cluster size limit to 16 on VMware
> > > >
> > > > +1
> > > >
> > > > The more we move these types of things out of configuration and
> > > > into component specific references the better.
> > > >
> > > > --Alex
> > > >
> > > > > -----Original Message-----
> > > > > From: Tamas Monos [mailto:tamasm@veber.co.uk]
> > > > > Sent: Thursday, December 20, 2012 8:10 AM
> > > > > To: cloudstack-dev@incubator.apache.org
> > > > > Subject: RE: [PROPOSAL] Raise cluster size limit to 16 on VMware
> > > > >
> > > > > Hi,
> > > > >
> > > > > I'd recommend removing any hard limits from CS and introduce a
> > > > > variable like "max.guest.limit" on the Hypervisor Capabilities page.
> > > > > This value could default to 8, but should the admin decide
> > > > > otherwise could be set to anything.
> > > > >
> > > > > Regards
> > > > >
> > > > > Tamas Monos                                               DDI   
     +44(0)2034687012
> > > > > Chief Technical                                             Office
   +44(0)2034687000
> > > > > Veber: The Hosting Specialists               Fax         +44(0)871
522 7057
> > > > > http://www.veber.co.uk
> > > > >
> > > > > Follow us on Twitter: www.twitter.com/veberhost Follow us on
> > > Facebook:
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> > > > >
> > > > > -----Original Message-----
> > > > > From: David Nalley [mailto:david@gnsa.us]
> > > > > Sent: 20 December 2012 15:25
> > > > > To: cloudstack-dev@incubator.apache.org
> > > > > Subject: Re: [PROPOSAL] Raise cluster size limit to 16 on VMware
> > > > >
> > > > > On Thu, Dec 20, 2012 at 1:54 AM, Koushik Das
> > > > > <koushik.das@citrix.com>
> > > > > wrote:
> > > > > > This http://www.vmware.com/pdf/vsphere5/r51/vsphere-51-
> > > > > configuration-maximums.pdf mentions that the max. can be 32 for
> > > > > ESX
> > > 5.1.
> > > > > Any specific reason to make it 16? Also it needs to be seen that
> > > > > this limit works across all supported ESX versions.
> > > > > >
> > > > > > -Koushik
> > > > > >
> > > > >
> > > > > Yes - the different versions having different limits complicates
> > > > > things a
> > > bit.
> > > > > 5.1 = 32, 5.0 = 16 4.x = 8?
> > > > >
> > > > > --David
> > > > >


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