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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For the sequential tests, file size was varied along with the number of clients such that the total
amount of data written was 128G (number of clients * file size per client = 128G).
IOzone Sequential Writes
# /usr/sbin/iozone -i 0 -c –e –w –r 1024k –s 2g –t 64 -+n -+m ./clientlist
IOzone Sequential Reads
# /usr/sbin/iozone -i 1 -c -e -w -r 1024k -s 2g -t 64 -+n -+m ./clientlist
For the random tests, each client read or wrote a 2G file. The record size used for the random tests
was 4k to simulate small random data accesses.
IOzone IOPs Random Access (Reads and Writes)
# /usr/sbin/iozone -i 2 -w -r 4k -I -O -w -+n -s 2G -t 1 -+m ./clientlist
By using -c and -e in the test, IOzone provides a more realistic view of what a typical application is
doing. The O_Direct command line parameter allows us to bypass the cache on the compute node on
which we are running the IOzone thread.