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From Abhinandan Prateek <Abhinandan.Prat...@citrix.com>
Subject Re: [PROPOSAL] Raise cluster size limit to 16 on VMware
Date Wed, 06 Feb 2013 04:02:29 GMT
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
>> > > > > > > >
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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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