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From Koushik Das <koushik....@citrix.com>
Subject RE: [PROPOSAL] Raise cluster size limit to 16 on VMware
Date Wed, 06 Feb 2013 05:26:10 GMT
The changes are in review board. I will wait for some more time and if there is no feedback
will rebase and merge to master/4.1.

> -----Original Message-----
> From: Abhinandan Prateek
> Sent: Wednesday, February 06, 2013 9:32 AM
> To: cloudstack-dev@incubator.apache.org
> Cc: Koushik Das
> Subject: Re: [PROPOSAL] Raise cluster size limit to 16 on VMware
> 
> Koushik,
>    If you have not yet updated the progress of this 4.1 feature in jira, please
> do.
> 
> -abhi
> 
> On 27/01/13 3:44 PM, "Koushik Das" <koushik.das@citrix.com> wrote:
> 
> >See inline. Refer to the code changes @
> >https://reviews.apache.org/r/9041/
> >
> >
> >> -----Original Message-----
> >> From: Prashant Kumar Mishra [mailto:prashantkumar.mishra@citrix.com]
> >> Sent: Wednesday, January 23, 2013 1:56 PM
> >> To: cloudstack-dev@incubator.apache.org
> >> Subject: RE: [PROPOSAL] Raise cluster size limit to 16 on VMware
> >>
> >> Hi,
> >> I am planning to take the QA job for this feature. Have reviewed the
> >> functional spec(not much details are present), went through community
> >> discussion  and have the following questions.
> >>
> >> 1-Do we support mixed (heterogeneous) cluster for vmware in CS?
> >>         it seems VMWare support  mixed cluster, please correct me if
> >>I am wrong
> >>        a-"  http://communities.vmware.com/message/2008030"
> >>        b-"
> >>http://blogs.vmware.com/vsphere/2011/10/mixing-esxesxi-versions-
> >> in-an-hadrs-cluster.html"
> >
> >No
> >
> >> 2-Are We going to change Global config VMware cluster size limit  to 16?
> >
> >This is removed
> >
> >> 3- Apart from configuration  and  hypervisor_capabilities  table are
> >>there any  other table going to be modified ?
> >
> >Only hypervisor_capabilities table is modified
> >
> >> 4-In hypervisor _capabilities table what is dummy value we are going
> >>to put  for other hypervisor type , is it  -1 ?
> >
> >Default is null
> >
> >> 5-Any API changes ?
> >
> >No
> >
> >> 6-Upgrade path ?
> >
> >Not affected
> >
> >> 7-option of adding host  through  backdoor(adding host separately to
> >>cluster,  even cluster size > 8 host)  is still available ?
> >
> >No. Looking at the code doesn't look like the backdoor was available
> >earlier as well.
> >
> >>
> >> Thanks
> >> Prashant Kumar Mishra
> >>
> >>
> >>  -----Original Message-----
> >> From: Koushik Das [mailto:koushik.das@citrix.com]
> >> Sent: Thursday, January 10, 2013 1:56 PM
> >> To: cloudstack-dev@incubator.apache.org
> >> Subject: RE: [PROPOSAL] Raise cluster size limit to 16 on VMware
> >>
> >> There can be multiple dimensions based on which the size can vary but
> >> it cannot go beyond the max. value (32).
> >>
> >> I am referring to the following docs:
> >> http://www.vmware.com/pdf/vsphere4/r40/vsp_40_config_max.pdf
> >> http://www.vmware.com/pdf/vsphere5/r50/vsphere-50-configuration-
> >> maximums.pdf
> >> http://www.vmware.com/pdf/vsphere5/r51/vsphere-51-configuration-
> >> maximums.pdf
> >>
> >> -Koushik
> >>
> >> > -----Original Message-----
> >> > From: Hari Kannan [mailto:hari.kannan@citrix.com]
> >> > Sent: Thursday, January 10, 2013 12:43 PM
> >> > To: cloudstack-dev@incubator.apache.org
> >> > Subject: RE: [PROPOSAL] Raise cluster size limit to 16 on VMware
> >> >
> >> > Hi Koushik,
> >> >
> >> > I have a question/concern -
> >> >
> >> > The "limitations" are multi-dimensional - for example, vSphere 5.0
> >> > clusters hosting linked clone pools are limited to 8 ESXi hosts
> >> > when using VMFS datastores and 32 ESXi hosts when using only NFS
> >> > datastores. In 5.1, they made both 32 hosts. I think 4.0 had a
> >>different set
> >> of values.
> >> >
> >> > In other words, the host limits are hypervisor type, hypervisor
> >> > version, storage technology etc. i.e. we cant set the hard limit as
> >> > 32 as 5.0 did not support it for VMFS..
> >> >
> >> > Hari
> >> >
> >> > -----Original Message-----
> >> > From: Koushik Das [mailto:koushik.das@citrix.com]
> >> > Sent: Wednesday, January 9, 2013 10:30 PM
> >> > To: cloudstack-dev@incubator.apache.org
> >> > Subject: RE: [PROPOSAL] Raise cluster size limit to 16 on VMware
> >> >
> >> > To clarify some more.
> >> >
> >> > What I have suggested is to have a max. hosts per cluster limit
> >> > based on specific HV version. For e.g. for Vmware
> >> >
> >> > Version 4.0 will have a max. limit of X (i.e. in any CS Vmware 4.0
> >> > cluster, the max. number of hosts that can be added is X) Version
> >> > 4.1
> >>will
> >> have a max.
> >> > limit of Y Version 5.0 will have a max. limit of Z
> >> >
> >> > Based on the vmware specification X, Y, Z are all 32. As part of
> >> > best practices (in documentation) all the limitations discussed as
> >> > to why the limit was set to
> >> > 8 earlier can be mentioned. The idea is that CS shouldn't impose
> >> > any artificial restrictions and rely only on HV specifications to
> >> > the
> >>extent
> >> possible.
> >> >
> >> > For any new supported version another entry can be added to the
> >> > hypervisor_capabilities table.
> >> >
> >> > As Alex mentioned, the admin is free to decide on the number of
> >> > hosts that needs to be added in a cluster as long as the hard max.
> >> > limits are not exceeded.
> >> >
> >> > -Koushik
> >> >
> >> > > -----Original Message-----
> >> > > From: Koushik Das [mailto:koushik.das@citrix.com]
> >> > > Sent: Tuesday, January 08, 2013 11:45 PM
> >> > > To: cloudstack-dev@incubator.apache.org
> >> > > Subject: RE: [PROPOSAL] Raise cluster size limit to 16 on VMware
> >> > >
> >> > > See inline
> >> > >
> >> > > -Koushik
> >> > >
> >> > > > -----Original Message-----
> >> > > > From: Alex Huang [mailto:Alex.Huang@citrix.com]
> >> > > > Sent: Tuesday, January 08, 2013 11:24 PM
> >> > > > 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.
> >> > >
> >> > > Yes. Maximum based on the HV version.
> >> > >
> >> > > >
> >> > > > 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?
> >> > >
> >> > > Why should the admin be allowed to change these values? These are
> >> > > the max. limit supported by the specific HV based on the version.
> >> > >
> >> > > > > b) is this value set on a per cluster basis? If so, what
is
> >> > > > > the default
> >> > value?
> >> > >
> >> > > It's not per cluster.
> >> > >
> >> > > > >
> >> > > > > 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:
> >> > > > > > > > www.facebook.com/veberhost
> >> > > > > > > >
> >> > > > > > > > -----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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