Gabriele Bulfon wrote:
> Hi,
> I was wondering what (if any) problems I may encounter by mixing different
> zfs strategies on one pool,
> with all equal disk sizes.
> Examples:
> - pool1: raidz1 a0 a1 a2 mirror a3 a4
> - pool2: raidz1 b0 b1 b2 raidz1 b3 b4 b5 mirror b6 b7
> - pool3: mirror c0 c1 mirror c2 c3 raidz c4 c5 c6
> I'm just trying to balance pools performance and maximum space...
> Last but not least:
> - what if pool3 is actually the rpool (where system just occupies few
> GBytes), where I'll add
> volumes with quotas to share? Should I keep rpool separate absolutely?
> (I just don't want to miss many GB on an rpool that will just stay as it is,
> on the boot disks).
Last I checked, it wasn't possible to boot off of RAID-Z; only mirrors
were supported for boot. As for the other part, the man page says:
Virtual devices cannot be nested, so a mirror or raidz vir-
tual device can only contain files or disks. Mirrors of mir-
rors (or other combinations) are not allowed.
If you're looking to boost RAID-Z performance, I'd suggest adding more
disks. RAID-Z will effectively stripe the data across the available
devices, parallelizing the I/O operations. To get better error
tolerance, use raidz2 or raidz3.
--
James Carlson 42.703N 71.076W <carls...@workingcode.com>
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