Virgo Xeon Cluster

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The numbers are the result of averaging 10 runs on 2,4,8,16 and 32 processors on a linux cluster called virgo. Virgo has 16 computation nodes with dual xeon P4 (1.7Ghz) processors and 2GB of RDRAM. It has a gigabit interconnect and a pvfs filesystem composed of a partition on each node which is served by an i/o server.

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Show Graphs
Parallel-Netcdf Flash I/O Bench

# Processors	Checkpoint Files MB/Sec	Plotfiles (corners) MB/Sec	Plotfiles (centered) MB/Sec
2	30 MB/sec	6.0 MB/sec	3.6 MB/sec
4	6.3 MB/sec	8.0 MB/sec	5.2 MB/sec
8	5.9 MB/sec	9.0 MB/sec	6.0 MB/sec
16	6.0 MB/sec	11 MB/sec	7.4 MB/sec
32	6.2 MB/sec	13 MB/sec	9.0 MB/sec

# Processors	Checkpoint MB	Plotfiles (corners) MB	Plotfiles (centered) MB
2	15484 MB	1853 MB	1308 MB
4	31062 MB	3717 MB	2622 MB
8	62218 MB	7444 MB	5251 MB
16	124530 MB	14899 MB	10508 MB
32	249153 MB	29808 MB	21023 MB

HDF5 Flash I/O Bench

# Processors	Checkpoint MB/sec	Plotfile (Corners) MB/sec	Plotfile (Centered) MB/sec
2	9.6 MB/sec	3.0 MB/sec	1.9 MB/sec
4	6.8 MB/sec	5.0 MB/sec	3.7 MB/sec
8	6.0 MB/sec	8.7 MB/sec	6.5 MB/sec
16	5.5 MB/sec	12 MB/sec	8.2 MB/sec
32	5.8 MB/sec	15 MB/sec	11 MB/sec

# Processors	Checkpoint MB	Plotfiles (corners) MB	Plotfiles (centered) MB
2	18564 MB	1860 MB	1314 MB
4	36876 MB	4248 MB	3206 MB
8	67612 MB	8243 MB	6158 MB
16	129804 MB	15464 MB	11294 MB
32	252284 MB	30163 MB	21822 MB