Oliver Schinagl wrote:
Hello,
I'm quite interested in ZFS, like everybody else I suppose, and am about
to install FBSD with ZFS.
cool.
On that note, i have a different first question to start with. I
personally am a Linux fanboy, and would love to see/use ZFS on linux. I
assume that I can use those ZFS disks later with any os that can
work/recognizes ZFS correct? e.g. I can install/setup ZFS in FBSD, and
later use it in OpenSolaris/Linux Fuse(native) later?
The on-disk format is an available specification and is designed to be
platform neutral. We certainly hope you will be able to access the
zpools from different OSes (one at a time).
Anyway, back to business :)
I have a whole bunch of different sized disks/speeds. E.g. 3 300GB disks
@ 40mb, a 320GB disk @ 60mb/s, 3 120gb disks @ 50mb/s and so on.
Raid-Z and ZFS claims to be uber scalable and all that, but would it
'just work' with a setup like that too?
Yes, for most definitions of 'just work.'
I used to match up partition sizes in linux, so make the 320gb disk into
2 partitions of 300 and 20gb, then use the 4 300gb partitions as a
raid5, same with the 120 gigs and use the scrap on those aswell, finally
stiching everything together with LVM2. I can't easly find how this
would work with raid-Z/ZFS, e.g. can I really just put all these disks
in 1 big pool and remove/add to it at will?
Yes is the simple answer. But we generally recommend planning. To begin
your plan, decide your priority: space, performance, data protection.
ZFS is very dynamic, which has the property that for redundancy schemes
(mirror, raidz[12]) it will use as much a space as possible. For example,
if you mirror a 1 GByte drive with a 2 GByte drive, then you will have
available space of 1 GByte. If you later replace the 1 GByte drive with a
4 GByte drive, then you will instantly have the available space of 2 GBytes.
If you replace the 2 GByte drive with an 8 GByte drive, you will instantly
have access to 4 GBytes of mirrored data.
And I really don't need to
use softwareraid yet still have the same reliablity with raid-z as I had
with raid-5?
raidz is more reliable than software raid-5.
What about hardware raid controllers, just use it as a JBOD
device, or would I use it to match up disk sizes in raid0 stripes (e.g.
the 3x 120gb to make a 360 raid0).
ZFS is dynamic.
Or you'd recommend to just stick with raid/lvm/reiserfs and use that.
ZFS rocks!
-- richard
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