<div>Hello Dr. Satish, I am still bit confused in taking decesion and wanting some more guidence from you and PETSc users/maint.<br></div>
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<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3"><u><strong>Question ONE:</strong></u></font></p>
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<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">Please help me in selecting out one of the following two clusters, <font color="#cc0000"><strong>bit updated/changed from my previous choices.</strong></font></font></p>
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<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">As I am going to make a gigabit ethernet cluster of 4 compute nodes (totaling 8 cores), with each node having:</font></p>
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<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">(Choice 1) </font></p>
<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">One Processor: Intel Core2Duo E6750 2.66GHz, FSB 1333MHz, 4MB L2.</font></p>
<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">Motherboard: Intel <font color="#cc0000">Desktop Board DX38BT</font> with Intel X38 Chipset supporting 1333/1066/800 MHz system bus.</font></p>
<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">RAM: 2GB <font color="#cc0000">DDR3 1333MHz</font> ECC System Memory.</font></p>
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<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">(Choice 2)</font></p>
<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">One Processor: Intel Xeon 3075 2.66GHz, FSB1333, 4MBL2.</font></p>
<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">Motherboard: Intel Entry Server Board Intel S3200SHV with intel 3200 Chipset supporting 1333/1066/800 MHz system bus.</font></p>
<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">RAM: 2GB DDR2 800MHz ECC System Memory.</font></p>
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<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">Which one system has larger memory-bandwidth/CPU-core? Better for PETSc?</font></p>
<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">Any other comment/remark? </font></p>
<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">My area work deals in sparse matrices.</font></p>
<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">I near future I would like to add 12 similar compute nodes in the cluster. So my decision should be optimum/long-lasting.</font></p>
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<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3"><strong><u>Question TWO:</u></strong></font></p>
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<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">I want to make ROCKS V cluster on Intel x86_64 machines (selected from the above options). ROCKS V is available separately for both i386 and x86_64 machines. But I have not seen two different version of PETSc for i386 and x86_64 machines. </font></p>
<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">Is there only a single version for PETSc for both i386 and x86_64 machines? IF YES, then out of "ROCKS/OS i386" and "ROCKS/OS x86_64" which one is more suitable (efficiecy/speed/performance wise) for PETSc?</font></p>
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<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">Regards,</font></p>
<p class="MsoNormal" style="MARGIN: 0in 0in 0pt"><font face="Times New Roman" size="3">Amjad Ali.</font></p><br></div>
<div class="gmail_quote">On Tue, Apr 22, 2008 at 8:25 PM, Satish Balay <<a href="mailto:petsc-maint@mcs.anl.gov">petsc-maint@mcs.anl.gov</a>> wrote:<br>
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<div class="Wj3C7c">On Tue, 22 Apr 2008, amjad ali wrote:<br><br>> Hello,<br>><br>> Please help me out in selecting any one choice of the following:<br>> (Currently I am making a gigabit ethernet cluster of 4 compute nodes<br>
> (totaling 8 cores), with each node having)<br>><br>> (Choice 1)<br>> One Processor: Intel Core2Duo E6750 2.66 GHz Processor, FSB 1333MHz, 4MB L2.<br>> Motherboard: Intel Entry Server Board Intel S3200SHV with intel 3200 Chipset<br>
> supporting 1333/1066/800 MHz FSB .<br>> RAM: 2GB DDR2 800MHz ECC System Memory.<br>><br>> (Choice 2)<br>> One Processor: Intel Xeon 3075 2.66 GHz FSB1333 4MBL2.<br>> Motherboard: Intel Entry Server Board Intel S3200SHV with intel 3200<br>
> Chipset supporting 1333/1066/800 MHz FSB .<br>> RAM: 2GB DDR2 800MHz ECC System Memory.<br>><br>> Which one system has larger memory-bandwidth/CPU-core?<br>> Any other comment/remark?<br>> My area work deals in sparse matrices.<br>
> I near future I would like to add 12 similar compute nodes in the cluster.<br><br></div></div>Based on the above numbers - the memory bandwidth numbers should be<br>the same. And I expect the performance to be the same in both cases.<br>
<br>Ideally you would have access to both machines [perhaps from the<br>vendor] - and run streams benchmark on each - to see if there is any<br>difference.<br><font color="#888888"><br>Satish<br></font></blockquote></div>
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