Re: 10g RAC using SAN for storage

macdba321 wrote:

> On Sep 12, 9:29 pm, DA Morgan <damor..._at_psoug.org> wrote:
>> macdba321 wrote:
>>> On Sep 12, 9:35 am, DA Morgan <damor..._at_psoug.org> wrote:

>>>>> I am testing a 2 node RAC setup and want to try using a SAN for the
>>>>> dedicated storage (instead of a dedicated local storage disk array
>>>>> located within the same frame).
>>>>> Are there any "gotchas" that I should be aware of when using the SAN
>>>>> for storage as opposed to a typical storage array?
>>>>> Thanks!

>>> Thanks for the reply.
>>> I plan to use ASM over raw devices. (Again, this is purely for test/
>>> learning, not a production application.)
>>> Please correct me if I'm wrong, but I'm assuming that I'll need HBAs
>>> for both nodes to connect to the same LUNs on the SAN? (There's no way
>>> to do it without the HBA is there?)
>>> Thanks.
>> Not with a SAN unless you have an antique with fibre protocol over
>> copper and can find drivers for it. Another possibility is to use
>> iSCSI drivers.
>> --
>> Daniel A. Morgan
>> Oracle Ace Director & Instructor
>> University of Washington
>> damor..._at_x.washington.edu (replace x with u to respond)
>> Puget Sound Oracle Users Groupwww.psoug.org
> 
> Thanks again for the reply. I will proceed with acquiring HBAs for
> each node.
> A related question if I may: Why would one require a single-channel
> Vs. dual-channel HBA in each node?
> 
> Thanks again!

Dual channel cards are good for bonding to obtain higher bandwidth. I like to have two cards, bonded, so that if one card fails it does not become a single point of failure.

-- 
Daniel A. Morgan
Oracle Ace Director & Instructor
University of Washington
damorgan_at_x.washington.edu (replace x with u to respond)
Puget Sound Oracle Users Group
www.psoug.org