On Mar 26, 2010, at 8:58 AM, Svein Skogen wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 26.03.2010 16:55, Bottone, Frank wrote: >> Does zfs handle 4kb sectors properly or does it always assume 512b sectors? >> >> >> >> If it does, we could manually create a slice properly aligned and set >> zfs to use it? > > A real simple patch would be to attempt alignment with 4096 every time > (since 4096 is a multiple of 512 there really wouldn't be a performance > penalty here). This would mean that things are optimal on _ALL_ disks. > (and allow those of us using more advanced diskcontrollers to set the > strip-size (strip size, not stripe size) to 4K as well)
Two thoughts: 1. the "performance impact" may not be very great, but I'm sure there are exceptions in the consumer-grade market 2. people will be disappointed with the reduced compressibility of their data -- richard ZFS storage and performance consulting at http://www.RichardElling.com ZFS training on deduplication, NexentaStor, and NAS performance Las Vegas, April 29-30, 2010 http://nexenta-vegas.eventbrite.com _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
