VMware vSphere 4

10
VM WARE WHITE PAPE R
Figure 7. Netperf Latency Comparison
0
100
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300
500
400
600
700
800
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1000
FT Disabled
FT Enabled
Netperf - latency sensitive case
Mbits/sec
Receives Transmits
FT trac
Rx: 500 Mbits/sec
Tx: 36 Mbits/sec
3.5. Filebench Random Disk Read/Write
Filebench is a benchmark designed to simulate dierent I/O workload proles. In this experiment, lebench was used to generate
randomI/Osusing200workerthreads.Thisworkloadsaturatesavailablediskbandwidthforthegivenblocksize.EnablingFTdidnot
impact throughput; however, at large block sizes, disk read operations consumed signicant networking bandwidth on the
FTloggingNIC.
Figure 8. Filebench Performance
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5000
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6000
7000
8000
9000
FT Disabled
FT Enabled
Filebench
IOPS
2KB read 64KB read 2KB write 64KB write 2KB read/write
FT trac
2K read: 155 Mbits/sec
2K write: 3.6 Mbits/sec
64K read: 1400 Mbits/sec
64K write: 1.96 Mbits/sec
2K read/write: 34 Mbits/sec