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Dell HPC NFS Storage Solution - High Availability Configurations
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switch. Note that the network switch setting might vary for single client performance tests as
opposed to multiple concurrent clients accessing the storage. Hence the network switch options
should be tuned accordingly. These results are shown in Figure 12. The large sequential read
throughput was 864 MB/sec for the Large configuration and 700 MB/sec for the Medium
configuration from this 10GbE client. Large sequential write throughput was 219 MB/sec for both
the Large and Medium configurations.
Figure 12 - Single 10GbE Client - Large Sequential Reads and Writes
5.3. Random Reads and Writes
The results for the random read and write tests were very close for InfiniBand and 10 Gigabit
Ethernet, with the average difference being less than 3%. Only the InfiniBand results are presented
and discussed in this section.
Similar IPoIB and 10GbE performance indicates that the bottleneck in this case is the disks and not
the network. This is to be expected as the performance of random reads and writes are dominated
by the disk seek latency and cache plays less of a role for random operations.
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Large-write Large-read Medium-write Medium-read
Throughput in MB/s
Single 10GbE, 1GbE client
Large sequential Reads and Writes
10GbE client 1GbE-client