Subject: Re: Softdeps
To: Jason R. Fink <firstname.lastname@example.org>
From: Greg A. Woods <email@example.com>
Date: 05/17/2002 23:24:31
[ On Friday, May 17, 2002 at 23:04:30 (-0400), Jason R. Fink wrote: ]
> Subject: Softdeps
> I would like to do a *valid* study of softdeps
> impact on system performance. I have enabled it
> on all of my hosts and so far am pleased, but
> I want to find the catch.
> Thusfar I have forumulated the following tools
> I can use to measure the impact of softdep:
> bsdbench (paging/mfs usage)
> time ls -1R /usr/pkg
> time du -s /usr/pkg
Don't forget pkgsrc/benchmarks/postmark....
Also untar pkgsrc.tar.gz and then "rm -rf" it.
> So, my question to the gang is, I want one tool,
> one test, I am thinking bonnie.
no, postmark would be better. bonnie won't do much different for
softdep -- it's geared for testing maximum I/O rates on a single file,
not general throughput of all operations.
When I was testing external RAID hardware performance vs. cache size and
chunk-size I used the following:
# printf 'set bias read 5\nset bias create 5\nset size 10240 20480\nset transactions 100000\nset subdirectories 10\nset number 10000\nshow\nrun\n' | postmark
Greg A. Woods
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