Date: Mon, 29 Mar 2010 10:33:35 -0500
To: Ramiro Barreca <rbarreca@gmail.com>, pgsql-admin@postgresql.org
From: Michael Gould <mgould@intermodalsoftwaresolutions.net>
Subject: Re: Virtualization vs. sharing a server
Message-ID: <f4bb7d2d0bb97154e5c7cb878cc7734a@intermodalsoftwaresolutions.net>
In-Reply-To: <b1fec7231003290750n3326e86bs6521de808c7d504c@mail.gmail.com>
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Ramiro,


I don't know why virtualization is considered a  no-no.=A0 We use VMware =
ESX.=A0
On some smaller applications we run both the  application and database on
the virutal machine.=A0 We've not had a issue  with this combination in 5+
years.=A0 We also have 6 images that run on 2  machines just for the
appliations.=A0 Each of these 5 machines is running  Windows 2003 Server =
with
Citrix XenAPP.=A0 We do have 2 database servers  that are running 2 Quad =
Cores
Intel processors, one with 32 gig and one  with 64 gig.=A0 We also have a
couple of old PIII 1 Gig machines running  as our AD servers.


Each of the database servers are currently  running SQL Anywhere 9 and =
MSSQL
2005.=A0 We've never had a issue.=A0 We  keep one server (64 Gig one) as =
our
primary server and the other as a  hot backup with auto failover.


If it were not for the  virtualized application machines we would have had
to purchase quite a  bit more hardware.=A0 Since these are all quad core =
with
32 gig running  Windows 2003 64 bit, we can run about 100 users =
concurrently
on each  application server before we start to see a strain.


In the  past 5 years we've had one time when (when we only 2 physical
servers)  and we lost one and the other was able to handle all of the
application  needs although much more slowly.


I think that the success of  virutalization is like anything else, having
the right people to set it  up.=A0 We have no one in our compay to do this
kind of thing so we  contract it out to others with platinum =
certifications
from the various  vendors (Citrix/ Windows Servers and VMWare).=A0=20


When we finish  our commerical application to production we will probably
contract with  EnterpriseDB to help us with tuning Postgres and the =
servers
they run  on.


=A0


Best Regards


=A0


--
Michael Gould, Managing Partner
Intermodal Software Solutions, LLC
904.226.0978
904.592.5250 fax


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<p>Ramiro,</p>
<p>I don't know why virtualization is considered a  no-no.&#160; We use =
VMware ESX.&#160; On some smaller applications we run both the  =
application and database on the virutal machine.&#160; We've not had a =
issue  with this combination in 5+ years.&#160; We also have 6 images that =
run on 2  machines just for the appliations.&#160; Each of these 5 =
machines is running  Windows 2003 Server with Citrix XenAPP.&#160; We do =
have 2 database servers  that are running 2 Quad Cores Intel processors, =
one with 32 gig and one  with 64 gig.&#160; We also have a couple of old =
PIII 1 Gig machines running  as our AD servers.</p>
<p>Each of the database servers are currently  running SQL Anywhere 9 and =
MSSQL 2005.&#160; We've never had a issue.&#160; We  keep one server (64 =
Gig one) as our primary server and the other as a  hot backup with auto =
failover.</p>
<p>If it were not for the  virtualized application machines we would have =
had to purchase quite a  bit more hardware.&#160; Since these are all quad =
core with 32 gig running  Windows 2003 64 bit, we can run about 100 users =
concurrently on each  application server before we start to see a =
strain.</p>
<p>In the  past 5 years we've had one time when (when we only 2 physical =
servers)  and we lost one and the other was able to handle all of the =
application  needs although much more slowly.</p>
<p>I think that the success of  virutalization is like anything else, =
having the right people to set it  up.&#160; We have no one in our compay =
to do this kind of thing so we  contract it out to others with platinum =
certifications from the various  vendors (Citrix/ Windows Servers and =
VMWare).&#160; </p>
<p>When we finish  our commerical application to production we will =
probably contract with  EnterpriseDB to help us with tuning Postgres and =
the servers they run  on.</p>
<p>&#160;</p>
<p>Best Regards</p>
<p>&#160;</p>
<br />
<br /><hr style=3D"border:dotted 1px silver; width:90%; border:dotted 1px =
silver;"><div>Michael Gould, Managing Partner<br />
Intermodal Software Solutions, LLC</div>
<div>904.226.0978</div>
<div>904.592.5250 fax</div>


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