Comparing Disk Benchmark Tools Chris Brew FNAL

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?

Four BenchMark Tools Bonnie ++ Bonnie ++  IOZone IOZone  Reader/Writer Reader/Writer  Locally Written TIOBench TIOBench 

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

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 

Linux Local SCSI Disk Writes

Linux Local SCSI Disk Reads

Linux IDE Disk Writes

Linux IDE Disk Reads

Linux to SGI NFS Writes

Linux to SGI NFS Reads

SGI Local FibreChannel Writes

SGI Local FibreChannel Reads

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