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.kan...@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.hu...@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.kan...@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....@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....@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.hu...@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:tam...@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: > > > > > www.facebook.com/veberhost > > > > > > > > > > -----Original Message----- > > > > > From: David Nalley [mailto:da...@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....@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 > > > > >
