Re: [zfs-discuss] Useful Emulex tunable for i386

2009-06-30 Thread Bob Friesenhahn
On Sun, 28 Jun 2009, Bob Friesenhahn wrote: On Sun, 28 Jun 2009, Bob Friesenhahn wrote: Today I experimented with doubling this value to 688128 and was happy to see a large increase in sequential read performance from my ZFS pool which is based on six mirrors vdevs. Sequential read performanc

Re: [zfs-discuss] Useful Emulex tunable for i386

2009-06-28 Thread Bob Friesenhahn
On Sun, 28 Jun 2009, Bob Friesenhahn wrote: Today I experimented with doubling this value to 688128 and was happy to see a large increase in sequential read performance from my ZFS pool which is based on six mirrors vdevs. Sequential read performance jumped from 552787 MB/s to 799626 MB/s. It

[zfs-discuss] Useful Emulex tunable for i386

2009-06-28 Thread Bob Friesenhahn
The Emulex fiber channel device driver supports a max-xfer-size tunable (via /kernel/drv/emlxs.conf) which only applies to i386. This tunable specifies the scatter gather list buffer size. By default, this value is set to 339968 for Solaris 10. Today I experimented with doubling this value to