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
Page 27
Figure 14 - IPoIB Random Read Performance
5.4. Metadata tests
The results for the mdtest (file create, stat, remove) were very close for InfiniBand and 10 Gigabit
Ethernet, with the average difference being less than 5%. 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. Similar to the random test results, this is to be expected as these tests generate a
large amount of small random I/O requests.
Figure 15, Figure 16 and Figure 17 show the results of file create, stat, and remove, respectively.
The results show that all three metadata operations are highly scalable in terms of the number of
NFS clients.
0
1000
2000
3000
4000
5000
6000
7000
1 2 4 8 16 32 48 64
IOPS
Number of clients
IPoIB Random Read Performance
Large Medium