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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Most existing 32-bit applications should
run on the 64-bit version of the OS. Even if you don’t have 64-bit
applications, 64-bit RHEL 3 has better NUMA scheduling and optimization than
the 32-bit version of the same operating system. So in the general case, you
will get better performance from the 64-bit OS on Opteron than you do from a
32-bit OS.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
amd64-list-bounces@redhat.com [mailto:amd64-list-bounces@redhat.com] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Jason DePaul<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, January 25, 2005
11:44 AM<br>
<b><span style='font-weight:bold'>To:</span></b> amd64-list@redhat.com<br>
<b><span style='font-weight:bold'>Subject:</span></b> Opteron 32-bit or 64-bit</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Hi
All:</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>I
am in the process of purchasing 40 nodes for a calculation cluster for my
company. We going to purchase Opteron based servers. My question
is, will I take full advantage of the servers if I installed the 32-bit version
of RHEL 3 ES? Do I need to install the 64-bit version of the either ES or AS to
fully utilize the Opteron systems. </span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Will
existing 32-bit applications run on the 64-bit version of the OS on the
Opteron.</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Thanks
and best regards</span></font><o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>JD<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Are you a Techie? Get Your Free Tech Email Address Now! Visit
http://www.TechEmail.com<o:p></o:p></span></font></p>
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