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ASE CE on VMware?

4 posts in Cluster Last posting was on 2008-04-08 17:52:30.0Z
Michael Heaney Posted on 2008-04-01 17:24:46.0Z
From: Michael Heaney <mheaney@jcvi.org>
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Subject: ASE CE on VMware?
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We've had good success consolidating a bunch of our (non-database)
servers onto a few, powerful VMware servers. Now I'm considering
implementing ASE CE under VMware, and am looking for some
guidance. Has Sybase done any realistic testing of ASE CE nodes
running on VMware, and if so, how does performance/scalability
compare to running each node on a dedicated machine?


Michael Heaney
JCVI


David Wein Posted on 2008-04-07 02:38:04.0Z
From: David Wein <david.wein@sybase.com>
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Subject: Re: ASE CE on VMware?
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We've been running CE under VMware, but from a testing / development
standpoint.

Are you looking to run multiple instances of the same cluster on the
same physical box (but in different VMs), or are you interested in
running in VMs across different physical hosts?

-Dave

Michael Heaney wrote:
> We've had good success consolidating a bunch of our (non-database)
> servers onto a few, powerful VMware servers. Now I'm considering
> implementing ASE CE under VMware, and am looking for some
> guidance. Has Sybase done any realistic testing of ASE CE nodes
> running on VMware, and if so, how does performance/scalability
> compare to running each node on a dedicated machine?
>
>
> Michael Heaney
> JCVI


Michael Heaney Posted on 2008-04-07 21:20:07.0Z
From: Michael Heaney <mheaney@jcvi.org>
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Subject: Re: ASE CE on VMware?
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David Wein wrote:
> We've been running CE under VMware, but from a testing / development
> standpoint.
>
> Are you looking to run multiple instances of the same cluster on the
> same physical box (but in different VMs), or are you interested in
> running in VMs across different physical hosts?
>

I could do either - are there recommendations for/against
either scenario?


Michael Heaney
JCVI


David Wein Posted on 2008-04-08 17:52:30.0Z
From: David Wein <david.wein@sybase.com>
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Subject: Re: ASE CE on VMware?
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I am not sure what the upside is to running multiple instances of the
same cluster on the same physical box. It is great for testing - but I
don't see what you gain for a production deployment.

As for running CE instances in a VM - one thing to keep in mind is that
CE is more resource intensive than regular ASE. Aside from the extra
code paths inside of ASE, we send a lot of IP messages between the
cluster instances which can stress the CPU due to running the IP stack.
I am not saying you shouldn't run in a VM, but realize that each
engine really needs its own core, and running in an environment where
lots of stuff is consolidated onto the same box may cause CPU starvation
issues - more so than you would normally see. Because the instances in
the cluster are so interdependent, having one system oversubscribed can
reduce the performance of the other systems due to increased message
latency.

-Dave

Michael Heaney wrote:
> David Wein wrote:
>> We've been running CE under VMware, but from a testing / development
>> standpoint.
>>
>> Are you looking to run multiple instances of the same cluster on the
>> same physical box (but in different VMs), or are you interested in
>> running in VMs across different physical hosts?
>>
>
>
> I could do either - are there recommendations for/against
> either scenario?
>
>
> Michael Heaney
> JCVI