White Papers

Dell HPC NFS Storage Solution High Availability Configurations with Large Capacities
29
A single NFS client with a 10 Gigabit Ethernet to the storage solution was also tested. In this case the
single 10GbE client and the NFS server were both directly connected to the PowerConnect 8024 10GbE
switch. Results for this test using the NFSv3 protocol are shown in Figure 12. From the graph it is seen
that write throughput is ~880MB/s and read throughput is ~1000MB/s for 144TB configuration. The 288
TB configuration is similar in performance.
Single 10gbE client sequential performance Figure 12.
6.3. Random writes and reads
This section presents the results for random write and read tests over IPoIB. From past experience,
random test results were expected to be very similar for 10GbE and IPoIB; however that was not
observed in this environment. The general pattern and curve of the graphs remained the same for both
networks, but the absolute performance varied depending on the number of concurrent clients in the
tests. Results for 10GbE will be presented in a blog post on www.hpcatdell.com at a later date.
Figure 13 presents the results of the random write tests. The figure shows the aggregate IO when a
number of clients are simultaneously writing to the storage. Peak IOPS (IO operations per second) for
the 144TB solution are close to 2000 IOPS. The 288TB solution has double the number of disk drives
when compared to the 144TB solution and the peak performance is about double at 4000 IOPs, showing
the scalability of the NSS-HA solution.
820
840
860
880
900
920
940
960
980
1000
1020
Write Read
Throughput in MB/s
Single 10GbE client sequential performance
144 TB