Hello, I''m going to build home server. System is deployed on 8 GB USB flash drive. I have two identical 2 TB HDD and 250 GB one. Could you please recommend me ZFS configuration for the set of my hard drives? 1) pool1: mirror 2tb x 2 pool2: 250 gb (or maybe add this drive to pool1???) 2) pool1: mirror 2tb x 2 + cache/log 250 gb -- This message posted from opensolaris.org
With two drives it makes more sense to use a mirror then raidz configuration. You will have the same amount of space and mirroring gives you more performance, afaik. -- This message posted from opensolaris.org
You can also make 250 GB slices (partitions) and create RAIDZ 3x250GB and mirror 2x1750GB (one or more). Mirror has better performance for write operations, Raidz shoud be faster for read. Regards -- Piotr Tarnowski /DrFugazi/ http://www.drfugazi.eu.org/ -- This message posted from opensolaris.org
On Mon, Jan 17, 2011 at 6:19 AM, Piotr Tarnowski <drfugazi at drfugazi.eu.org> wrote:> You can also make 250 GB slices (partitions) and create RAIDZ 3x250GB and mirror 2x1750GB (one or more).This configuration doesn''t make a lot of sense for redundancy, since it doesn''t provide any. It will have poor performance caused by excessive disk seeks as well. The only time it would make sense is if you''re planning on replacing each slice with a separate drives.> Mirror has better performance for write operations, Raidz shoud be faster for read.ZFS mirrors will read off of both sides of the mirror, as in a stripe. -B -- Brandon High : bhigh at freaks.com
> From: zfs-discuss-bounces at opensolaris.org [mailto:zfs-discuss- > bounces at opensolaris.org] On Behalf Of Trusty Twelve > > Hello, I''m going to build home server. System is deployed on 8 GB USBflash> drive. I have two identical 2 TB HDD and 250 GB one. Could you please > recommend me ZFS configuration for the set of my hard drives? > 1) > pool1: mirror 2tb x 2 > pool2: 250 gb (or maybe add this drive to pool1???) > 2) > pool1: mirror 2tb x 2 + cache/log 250 gbI recommend option 3: mirror 2tb x 2 disconnect 250G disconnect 8G flash drive