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3
Oct. 2002: Unpack all the Legend PCs and moved them to HW305.
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4-5
Oct. 2002: Network cabling.
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7 Oct.
2002, Network Booting Test.
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17
Oct. 2002, Mr. Sit Yiu Fai has run the Linpack using 256 PCs of the Gideon 300 Cluster. The 256 PCs can achieve 290 Gflops, which can be ranked 169th according to the old TOP500 2002/06 list.
Later in the same day, Sit reported that we can achieve Linpack
performance 304 Gflops using 256 nodes. 304 is about 29.6% efficiency for 256 nodes.
In this test, Intel compiler and LAM/MPI were used. Each test runs for slightly more than a hour, with a problem size of
119808. Anthony reported that when he left HW305, the measured room temperature
was 36 degree C (only one air con was working).
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19 Oct.
2002: HKU School Open Day. T he PC
Cluster Lab. (HW305) was opened for public. Parallel raytracing and JESSICA2 were
shown. (photo)
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21
Oct. 2002:
Linpack benchmark on the whole Gideon cluster
were started.
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26
Oct.
2002, GD193 went dead completely. It can't even boot up the BIOS.
Besides the broken machine, we found that one machine has the memory error. When we perform the Linpack test, the benchmark result showed
that there are errors in the calculated results. After investigation, Ah Sit identified the cause was coming from the memory of a particular
machine.
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28 Oct. 2002 (11:19): Ah Sit has identified the problem that broke the machine. It is due
to the memory failure. There are total 2 machines have been identified with memory
problem.
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28 Oct. 2002 (13:30):
One more machine was dead. Again, due to the memory failure problem. So altogether we have TRHEE broken
machines with memory error. Memory bars were replaced.
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28 Oct 2002 (18:00): Final
Linpack result : 355.5 GFLOPS, N=129600 (Full
Report)
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6
Nov.
2002, 32 Gideon PCs were allocated for CE2
and SE2 students for doing their POS (principles of operating system) taught
by Dr. C.L. Wang.
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15
Nov. 2002: The Gideon 300 cluster has been ranked the 175th on the
TOP500 list 11/2002.
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4 Dec., 2002:
JESSICA2 demo on 64 nodes for a delegation from the Peking University led by
Prof. Xuzong Chen (Vice Dean of School of Electronics Engineering & Computer
Science) visiting our Department.