262K mesh: Grid performance summary

Table 11: 262K mesh: Globus performance summary

Name of cluster(s)	CPUs	262K	22K AGARD
nina	8	1.0	1.0
iusti	8	1.0	1.6
pf	8	1.7	2.9
cemef	8	2.3	2.2
nina-pf	4-4	1.2	2.3
inter cluster
nina-iusti	4-4	1.9	15.7
nina-cemef	4-4	1.7	17.1
pf-iusti	4-4	2.5	15.6
pf-cemef	4-4	2.2	16.7
iusti-cemef	4-4	2.9	21.7

Shown in Table 11 are the performances for different combinations of the MecaGRID cluster for the 262K mesh. Also shown for comparison are the AGARD results obtained with the explicit solver. Table 11 shows better inter-cluster and intra-cluster performances for the 262K mesh than the 22K AGARD swept wing test case.

Regarding the shockwave-bubble test case with the 262K vertices mesh, the following observations are made:

1. Based on the inter-cluster Grid performance, 262K mesh seems suitable for Grid applications. The individual clusters Communication/Work ratios are in the range 3-7 percent. The inter-cluster Communication/Work ratios are less than 0.7.

2. The INRIA-pf cluster gives a better performance than the CEMEF cluster. Equivalent performance was expected.

3. In general, inter-cluster Grid computations involving the CEMEF cluster were the least efficient with the exception of the nina-cemef (1.7).