On 3/15/06, Mrugesh Karnik <[EMAIL PROTECTED]> wrote: > Anyway, now I'm wondering how much effect an I/O Scheduler will have on the > drive performance, as compared to hdparm settings. > > 'hdparm -tT' gives me a read speed of ~55MB/s on my AMD Sempron64 2500+ > system. My hard disk isn't even SATA. I don't think it is possible to squeeze > out much more. I suppose switching I/O Schedulers on my system won't make > much of a difference. > > Does anyone have more information about this? > > Mrugesh
u could do a dd if=/dev/zero of=<filename> and write large gb files... experiment with bs and count tht will give u files of larger sizes.. wht we found was deadline performed better when it came to io writes, we were doing it on sata , optereon 246 (dual) server. best way would be when entereing ur kernel after lilo or grub type in this.. "elevator=deadline" and then keep changind from deadline to cfqor anticipatory. and do io writes , u could do a #date && dd if=/dev/zero of=tmp bs=64K count=16 && date so the differnce in time would give u approx io time... also u could use sar or vmstat to get brief ideas on read write. -- "He who fights monsters should look to it that he himself does not become one." - Friedrich Nietzche -- http://mm.glug-bom.org/mailman/listinfo/linuxers
