Date: Tue, 14 Oct 2014 01:08:08 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Ben Morrow" <ben@morrow.me.uk>, <truckman@FreeBSD.org>, <freebsd-stable@freebsd.org> Subject: Re: getting to 4K disk blocks in ZFS Message-ID: <3E07EBCFC6914F9D8BF582DDA08F360D@multiplay.co.uk> References: <77AA5757-5DC1-415B-899E-30545BF91516@mac.com> <20141013235951.GA43024@anubis.morrow.me.uk>
next in thread | previous in thread | raw e-mail | index | archive | help
----- Original Message -----
From: "Ben Morrow" <ben@morrow.me.uk>
> Put a UFS on a zvol? You get the raidz/snapshots of the zpool but since
> UFS uses fragments you should waste less space with small files.
So your forcing to do exactly what it did when using 512b sectors just with
an extra layer in the middle for no reason. Doesn't sound like a good idea.
> In principle ZFS could use fragments too, though the copy-on-write logic
> would end up looking exactly like SSD wear-levelling logic, and might be
> slow enough to be a problem. I don't know if anyone is working on this.
Most SSD's advertise this so you could achieve this if you wanted to
but then your just back where you started from.
Regards
Steve
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3E07EBCFC6914F9D8BF582DDA08F360D>