On Mon, Aug 07, 2006 at 06:16:12PM +0200, Robert Milkowski wrote: > > ES> Second, you may be able to get more performance from the ZFS filesystem > ES> on the HW lun by tweaking the max pending # of reqeusts. One thing > ES> we've found is that ZFS currently has a hardcoded limit of how many > ES> outstanding requests to send to the underlying vdev (35). This works > ES> well for most single devices, but large arrays can actually handle more, > ES> and we end up leaving some performance on the floor. Currently the only > ES> way to tweak this variable is through 'mdb -kw'. Try something like: > > Well, strange - I did try with value of 1, 60 and 256. And basically I > get the same results from varmail tests. >
Well that's good data, too. It means that this isn't an impediment for this particular test. It was just a shot in the dark... - Eric -- Eric Schrock, Solaris Kernel Development http://blogs.sun.com/eschrock _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
