Re: zfs on a SAN
- From: "Richard B. Gilbert" <rgilbert88@xxxxxxxxxxx>
- Date: Sun, 25 Jun 2006 11:53:13 -0400
Sanjay wrote:
Chris Cox <notccox@xxxxxxxxxxxxxx> wrote:
Fine.. Solaris will simply see a disk.. who cares if it's one or many,
raid or no raid.
According to the ZFS docs - ZFS cares and they recommend against using hardware
RAID.
It's a standardization issue for us - we have AIX, Windows & Solaris & EMC on the
backend.
The 3 other OS's will use the EMC the EMC hardware raid. This means that all the
EMCs going into our data centers will be configured (1+0 for expensive mission
critical and Clarriion w/RAID for low end).
At this point the SAN team - rightfully so wants to standardize on how they do raid
mirroring.
So I guess we'll just use ZFS without it's RAID features.
You can continue to use the hardware EMC raid.
Yeah - according to the ZFS docs it's not recommended. If it's not recommended I"m wondering
if it's not supported.
Well Sun is probably not going to support EMC RAID or anything else EMC. EMC gives you a bunch of LUNs that look like disks and act like disks. There is no way to tell the difference except for what EMC reports back as the drive type; ISTR that it just says it's an EMC drive even though the actual hardware might be IBM or Seagate or . . . . EMC does support it and that's what counts.
There is no point in asking ZFS to RAID or mirror EMC LUNs and I suspect that performance might suffer if you did. If, OTOH, you need a 5 terabyte volume, ZFS might put one together for you (don't know the details but I believe that ZFS uses enough bits to count some really humongous number of blocks.) I don't expect to ever have or need that much but some people do.
.
- References:
- zfs on a SAN
- From: Sanjay
- Re: zfs on a SAN
- From: Chris Cox
- Re: zfs on a SAN
- From: Sanjay
- zfs on a SAN
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