White Papers
Table Of Contents
- Executive Summary (updated May 2011)
- 1. Introduction
- 2. Dell NFS Storage Solution Technical Overview
- 3. NFS Storage Solution with High Availability
- 4. Evaluation
- 5. Performance Benchmark Results (updated May 2011)
- 6. Comparison of the NSS Solution Offerings
- 7. Conclusion
- 8. References
- Appendix A: NSS-HA Recipe (updated May 2011)
- A.1. Pre-install preparation
- A.2. Server side hardware set-up
- A.3. Initial software configuration on each PowerEdge R710
- A.4. Performance tuning on the server
- A.5. Storage hardware set-up
- A.6. Storage Configuration
- A.7. NSS HA Cluster setup
- A.8. Quick test of HA set-up
- A.9. Useful commands and references
- A.10. Performance tuning on clients (updated May 2011)
- A.11. Example scripts and configuration files
- Appendix B: Medium to Large Configuration Upgrade
- Appendix C: Benchmarks and Test Tools
Dell HPC NFS Storage Solution - High Availability Configurations
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Figure 9 - IPoIB Large Sequential Read Performance
5.2. 10 Gigabit Ethernet Sequential Reads and Writes (updated May 2011)
For the 10 Gigabit Ethernet tests, flow control was disabled on the PowerConnect 8024 switch and
two PowerConnect 6248 switches. 10GbE sequential write results are shown in Figure 10. The
figure shows the aggregate throughput that can be achieved when a number of clients are
simultaneously writing to the storage over the 10 Gigabit Ethernet fabric.
The results show that the peak write performance of the NSS-HA solution is close to 1100 MB/s. As
all the compute nodes in the test bed are finally connected to the NFS server via a single 10 Gigabit
connection, the theoretical network bandwidth is limited to 1.25 GB/sec which is much less than
the I/O bandwidth of the shared storage array. Since the bottleneck in this solution is the network
and not the disk, both the Medium and the Large configuration have similar results.
10GbE sequential read results are shown in Figure 11. The figure shows the aggregate throughput
that can be achieved when a number of clients are simultaneously reading from the storage over
the 10 Gigabit Ethernet fabric. The results show that the peak read performance of the NSS-HA
solution is about 1170 MB/s. As the network is the bottleneck, both the Medium and the Large
configuration also have similar read results.
0
500
1000
1500
2000
2500
3000
1 2 4 8 16 32 48 64
Throughput: MB/sec
Number of clients
IPoIB Large sequential reads
Large Medium