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 13 - IPoIB Random Write Performance
Figure 13 shows the IPoIB random write performance. The figure shows the aggregate I/O
operations per second when a number of clients are simultaneously writing to the storage over the
InfiniBand fabric. The results show that the peak random write IOPS of the NSS-HA Large
configuration is about 1930 IOPS. The peak of the NSS-HA Medium is about 950 IOPS. The additional
disk spindles in the NSS-HA Large configuration help the performance scale better. Both
configurations maintain the peak IOPS across a range of clients. The performance of NSS-HA
random writes are limited by the design choices of NFS sync export option, cache mirroring on the
MD3200 controllers and the well-known performance limitation of small writes for RAID 6. The
random read performance shown in Figure 14 is better than the write performance for this reason.
The read results demonstrate that both the NSS-HA Large and Medium configurations scale well
with the number of clients. 64 clients are not enough to note the saturation.
0
500
1000
1500
2000
2500
1 2 4 8 16 32 48 64
IOPS
Number of clients
IPoIB Random Write Performance
Large Medium