>On Wed, Nov 26, 2008 at 04:30:59PM +0100, "C. Bergstr?m" wrote: >> Ok. here's a trick question.. So to the best of my understanding zfs >> turns off write caching if it doesn't own the whole disk.. So what if s0 >> *is* the whole disk? Is write cache supposed to be turned on or off? > >Actually, ZFS doesn't turn on write caching if it doesn't own the whole >disk. It leaves it alone. You can turn it on yourself. > >It leaves it alone because it doesn't know if it would be safe to >enable. If you know that there is nothing on the disk other than ZFS, >you can enable it and ZFS will get the benefit.
Isn't it true that for IDE disks, the disks have "write caching" enabled by default? >Swapfile performance is usually pretty far down on the list of things I >want to optimize. I'd rather set up for good management and expect that >I won't need high-performance swapfiles. If swap performance is a bottleneck, add more memory. Casper _______________________________________________ zfs-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
