<br><br><div><span class="gmail_quote">2007/12/7, Bill Broadley <<a href="mailto:firstname.lastname@example.org">email@example.com</a>>:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
amjad ali wrote:<br>> Hello all,<br>><br>> I want to bulid a beowulf cluster of 16+1 nodes with each node having one<br>> Intel Core2Duo (2.66 GHz, FSB 1333MHz, 4MB L2) processor and GiGE as the<br>> interconnect. On this cluster, I would run my PETSc based CFD/FEM codes
<br>> (REQURING VERY FAST MEMORY/high memory bandwidth). Please help me out to<br>> select out any one of the following boards:<br><br>Keep in mind that the Petsc faq mentions:<br> A fast, low-latency interconnect; any ethernet, even 10 gigE cannot provide
<br> the needed performance.<br><br>I wouldn't assume that your workload will scale with gigE to 16 nodes.<br><br>> 1) Intel Server board S3200SH, System Bus 1333MHz, supprting 240-pin DDR2<br>> 800 MHz RAM<br>> 2) Intel Desktop board DX38BT, System Bus 1333MHz, supprting 240-pin DDR3
<br>> 1333 MHz RAM<br><br>The application performance difference should be minimal to nil. 2 800 MHz<br>64-bit dimms can easily saturate the 64 bit 1333 MHz FSB. I've not personally<br>tested DDR3, but all the tests I've seen show minimal performance improvements
<br>at substantial price increases.<br><br>> See that RAM speed difference. Given that keeping up running the cluster all<br>> the time and loging on of many user simultaneously is not the concern. The<br>> cluster may be dedicated to be used by one user whenever required. But it
<br>> may be the case that running a code for several days will be required.<br>><br>> Would the desktop board DX38BT be suitable to run the cluster for several<br>> hours/days?<br>> Which Board you recommend for this scenario?
<br><br>Either, you didn't mention the budget, but I'd at least consider a faster network.</blockquote><div><br>DX38BT have a 82566DC Gigabit controller, that isn't capable of jumbo frames (frame size is limited to 1500 bytes).
<br>But S3200SH have a 82566 controller too and a 82541PI that support jumbo frames up to 16kb (probably your switch will support frames up to 10kb).<br>