On 16 March 2011 21:37, Ivan Voras <ivo...@freebsd.org> wrote: > For now, there's a report (which actually inspired me to retest and > commit this) from someone who tried this on 2x 15k RPM SAS drives, > with much better results using read_max=128 (thread "gmirror > performance" on freebsd-fs@). I estimate that because his drives were > 15kRPM from the start, the improvement isn't as drastic going from 8 > to 128 as on these SATA drives I tested on (faster seeks). He went > from ~~ 195 MB/s to ~~ 258 MB/s while I go from ~~ 50 MB/s to ~~ 140 > MB/s.
Btw I also tested that random IO isn't affected by this: it isn't. The read-ahead heuristics is working. _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
