Thanks Georg. Just cloned your git repo. I might play around with it when I have some time. Brian L. On Thu, Oct 3, 2013 at 10:44 PM, Georg Schönberger <gschoenberger@xxxxxxxxxxxxxxxx> wrote: > ---- Original Message ----- >> From: "Jeffrey Mcvay (jmcvay)" <jmcvay@xxxxxxxxxx> >> To: "Brian L." <brianclam@xxxxxxxxx>, "Juergen Salk" <juergen.salk@xxxxxx>, fio@xxxxxxxxxxxxxxx >> Sent: Thursday, 3 October, 2013 11:39:32 PM >> Subject: RE: precondition ssd drives w/ fio >> >> >> > -----Original Message----- >> > From: fio-owner@xxxxxxxxxxxxxxx [mailto:fio-owner@xxxxxxxxxxxxxxx] >> > On >> > Behalf Of Brian L. >> > Sent: Thursday, October 03, 2013 2:09 PM >> > To: Juergen Salk; fio@xxxxxxxxxxxxxxx >> > Subject: Re: precondition ssd drives w/ fio >> > >> > Thank you all for the response. I found ssd-steadystate.fio in the >> > tarball. >> > >> > Brian >> > >> > Brian L. >> > >> > >> > On Thu, Oct 3, 2013 at 1:42 PM, Juergen Salk <juergen.salk@xxxxxx> >> > wrote: >> > > * Brian L. <brianclam@xxxxxxxxx> [131003 12:31]: >> > > >> > >> For benchmarking SSD drives, I was told that we should >> > >> precondition >> > >> our drives to get more accurate real world reading. >> > >> >> > >> I was wondering if anyone is using fio itself to precondition >> > >> ssd >> > >> drives or use a different script to populate random data on the >> > >> drives? >> > > >> > > Yes I did. The fio source tarball comes with a number of sample >> > > job files including `ssd-steadystate.fio´, which might be >> > > useful for preconditioning of ssd devices. >> > > >> > > Regards, >> > > >> > > Juergen >> > > >> > > -- >> > > GPG A997BA7A | 87FC DA31 5F00 C885 0DC3 E28F BD0D 4B33 A997 BA7A >> > -- >> > To unsubscribe from this list: send the line "unsubscribe fio" in >> > the body of a message to majordomo@xxxxxxxxxxxxxxx >> > More majordomo info at http://vger.kernel.org/majordomo-info.html >> >> Brian, >> >> Check the SNIA standard for how to test SSD performance. >> >> There are quite likely more elegant solutions, but I use the jobfile >> below. It is run sequential workloads of 100% write, 100% read, >> 100% write, and finally 100% read. The purpose of the reads is to >> force any existing bad or marginal blocks out of the user pool. This >> will precondition the drive. Please be aware that using numjobs > 1 >> is may not be a sequential workload. >> >> To measure steady state values takes a little more effort. I use the >> write_bw_log feature, run for several hours, and use statistical >> analysis to find the mean and standard deviation in the target time >> frame. >> >> Cheers, >> Jeff >> >> [global] >> thread >> group_reporting=1 >> direct=1 >> norandommap=1 >> randrepeat=0 >> refill_buffers >> ioengine=${IOENGINE} >> filename=${FILENAME} >> >> log_avg_msec=1000 >> >> [128kB_SeqWr_1x8_1stPass] >> write_bw_log=128kB_SeqWr_1x8_1stPass >> bs=128k >> rw=write >> numjobs=1 >> iodepth=8 >> >> [128kB_SeqRd_1x8_1ndPass] >> stonewall >> write_bw_log=128kB_SeqRd_1x8_1ndPass >> bs=128k >> rw=read >> numjobs=1 >> iodepth=8 >> >> >> [128kB_SeqWr_1x8_2ndPass] >> stonewall >> write_bw_log=128kB_SeqWr_1x8_2ndPass >> bs=128k >> rw=write >> numjobs=1 >> iodepth=8 >> >> [128kB_SeqRd_1x8_2ndPass] >> stonewall >> write_bw_log=128kB_SeqRd_1x8_2ndPass >> bs=128k >> rw=read >> numjobs=1 >> iodepth=8 > > Hi Brian, > I have written a Performance Test Tool using Fio in Python implementing the Solid State Storage Performance Test Specification Enterprise v1.0 (http://www.snia.org/sites/default/files/SSS_PTS_Enterprise_v1.0.pdf). > The tool is Open Source, you can find it at http://git.thomas-krenn.com/TKperf_v1.git/ and some information in our wiki (http://www.thomas-krenn.com/de/wiki/TKperf - currently only in German). > > Regards, Georg > -- > : Georg Schönberger > : Research & Development Executive > : Thomas-Krenn.AG | The server-experts > : http://www.thomas-krenn.com | http://www.thomas-krenn.com/wiki > > -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
