Re: Clusterware on solaris
- From: Guillermo Alan Bort <cicciuxdba@xxxxxxxxx>
- To: hrishys@xxxxxxxxxxx
- Date: Tue, 17 Mar 2009 13:58:24 -0300
Hey Hrishy,
I've always used raw devices for OCR and Voting, however I
understand Oracle is about to de-support everything on raw devices, I
wonder if this applies to ocr and voting. in any case, I never used
NFS for an Oracle Cluster, though I have used NFS for other purposes
and it proved to be very reliable.
About n-1 issue... well, I've mostly worked on two node RACs, and
the only RAC with more than two nodes I actually installed was a 9i
RAC, so there I just used on partition (raw, obviously since it's 9i)
for quorum (would be voting in 10g) and 1 partition for global cluster
configuration (OCR in 10g). I'd have to run a few tests to see if this
would work as well on 10g, but I don't see why not. (Installation
Guide for 10gR2 doesn't seem to specify any requirements for more than
one OCR and one Voting)
From the RAC install guide 10gR2 (For Linux, but I reckon it's the
same for solaris)
http://download.oracle.com/docs/cd/B19306_01/install.102/b14203/storage.htm#CDEJFCCB
it basically says that if you handle the ocr an voting with external
redundancy (i.e. raid 1 or raid 5) you just need one of each.
hth
Alan Bort
Oracle Certified Professional
On Tue, Mar 17, 2009 at 12:19 PM, hrishy <hrishys@xxxxxxxxxxx> wrote:
>
> Hi
>
> We are planning to install RAC on solaris without using any third party
> clutser filesystem.
>
> On linux we use OCFS2 for the OCR and voting disk.
>
> At this moment SAN or NAS is not finalized.
> My question what should be the layout for the voting disk and OCR for a n
> node cluster i understand we need to 2N-1 number of OCR and voting disks.
>
> How should i go about this
> Google search tells me i need to use NFS but is plain NFS that reliable ?
> Do i need to NFS mount from both the nodes plus one from some third machine
> or another SAN ?
>
> regards
> Hrishy
>
>
>
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>
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