1. Comparing Disk Benchmark Tools Chris Brew FNAL

2. Why? We are about to start testing a number of Storage Solutions We are about to start testing a number of Storage Solutions There are many public domain disk benchmarking tools around: There are many public domain disk benchmarking tools around:  What can/can’t they do?  If I see numbers from tool X can I compare those with my numbers from tool Y?

3. Four BenchMark Tools Bonnie ++ Bonnie ++  http://www.coker.com.au/bonnie++/ http://www.coker.com.au/bonnie++/ IOZone IOZone  http://www.iozone.org/ http://www.iozone.org/ Reader/Writer Reader/Writer  Locally Written TIOBench TIOBench  http://sourceforge.net/projects/tiobench http://sourceforge.net/projects/tiobench

4. Benchmark Tool Capabilites Bonnie++IOZoneReader/WriterTIOBench Linux Solaris Irix Filesiize Limit ??2GB2GB Variable Block Size Write Read Rewrite Reread  With additional scripting

5. Benchmark Tool Capabilites cont. Bonnie++IOZoneReader/WriterTIOBench Multiple Threads  Multi File Create Multi File Access  Multi File Delete Hotspotting Random Access Write  Random Access Read  Cluster Test 

6. Linux Local SCSI Disk Writes

7. Linux Local SCSI Disk Reads

8. Linux IDE Disk Writes

9. Linux IDE Disk Reads

10. Linux to SGI NFS Writes

11. Linux to SGI NFS Reads

12. SGI Local FibreChannel Writes

13. SGI Local FibreChannel Reads

14. Conclusions Benchmarking tools show a great deal of variability even on simple tests, especially where memory caching may be a factor Benchmarking tools show a great deal of variability even on simple tests, especially where memory caching may be a factor Bonnie++ and IOZone Read and Write speeds and roughly comparable in most cases Bonnie++ and IOZone Read and Write speeds and roughly comparable in most cases TIOBench Write speeds are generally not comparable but Read speeds are TIOBench Write speeds are generally not comparable but Read speeds are