zfs on a SAN
- From: Sanjay <sanjay@xxxxxxxxxxxxx>
- Date: 24 Jun 2006 03:00:55 GMT
Just read thru the zfsadmin guide on opensolaris.org. Of course like everyone
else I'm pretty excited about it but I'm starting to see some potential problems.
The documentation explicity says:
--
ZFS works best when given whole physical disks. Although constructing logical devices using a
volume manager, such as Solaris Volume Manager (SVM), Veritas Volume Manager (VxVM), or a
hardware volume manager (LUNs or hardware RAID) is possible, these configurations are not
recommended. While ZFS functions properly on such devices, less-than-optimal performance might
be the result.
--
That leaves us with a bit of a problem. Our storage is handled entirely by a group
of storage engineers who run our EMCs and brocade switches.
They handle the mirroring on their disk frames and it's a company standard to do
things this way.
I lose a disk and they replace it and often times I don't even know about it - the
process is 100% transparent to me.
They just present me with a few luns that I initialize with veritas and set into
volumes.
So with ZFS - would I be better off using the SAN for RAID? From what I've read about
ZFS it seems that the raid technology it offers is superior in some ways (RAID-Z or
it's checksumming) but getting company process to change around this is unlikely.
Has Sun done any interoperability testing with the highend Hitachis & Symmetrixs?
Ideally I suppose we could mirror or RAID the LUNs provided to us on our SAN but
it sounds like Sun doesn't recommend this.
-Sanjay
.
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