Re: 11G RAC Configuration
- From: Dan Norris <dannorris@xxxxxxxxxxxxx>
- To: lawrence.wolfson@xxxxxxxxxx
- Date: Wed, 6 Jan 2010 20:16:01 -0600
I've built RAC clusters on blades before without issue. The technology
matrix doesn't specify down to specific server types, so I'd expect that as
long as you stay within the boundaries of what's in the matrix, you should
expect no issues.
http://www.oracle.com/technology/products/database/clustering/certify/tech_generic_linux_new.html
I'm not sure why 2-node systems don't buy you much...they buy you 100% more
than one system, right? It all depends on the requirements and for most of
the 2-node clusters I know of, one of the two systems can handle the whole
workload so if there's a failure, workload can continue to run without
interruption.
As for two different systems, as long as the OSes are the same and the two
servers are connected to the same storage and are connected to one another
via a switch using GigE or better, they can be clustered. However,
heterogeneous systems are not that common in my experience and you'll likely
have somewhat unpredictable performance if the two servers have different
memory configurations, I/O bandwidth capabilites, and/or CPU speeds.
Specifically, if users use the two servers equally (via server-side load
balancing or other methods), they'll sometimes get connected to the faster
node, sometimes the slower node. For these reasons, I wouldn't like to have
one of these systems in my environment, but it is possible.
Dan
On Wed, Jan 6, 2010 at 7:33 PM, Wolfson Larry - lwolfs <
lawrence.wolfson@xxxxxxxxxx> wrote:
> One of our architects asked me if there were any issues with the
> configuration below?
> Apparently we have a project with a client having the HP BL465C and
> asking if we can use the DL365 or DL385.
> Plus the rest. He talked to an Oracle salesman who, of course, has no
> clue.
> I don't have any RAC configurations like this so any issues?
> Didn't think 2 node systems bought us much.
>
> TIA
> Larry
>
>
> Here is the configuration we discussed & are trying to validate as
> "Oracle supported"...
>
> * 2-node RAC cluster (11G):
>
> 1. Node One: HP BL465C (blade using Virtual Connect Ethernet &
> Virtual Connect Fibre-channel)
>
> 2. Node Two: HP DL365 (stand-alone system)
>
> 3. OS: RedHat Linux AS 5.3 (both systems)
>
> 4. Oracle RAC 11i
>
> 5. EMC DMX4 disk (currently supported microcode level no older
> than 5671)
>
> 6. Brocade SAN fabric (currently supported FOS level)
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