Re: 10g RAC using SAN for storage
Date: Wed, 17 Sep 2008 09:17:16 -0700 (PDT)
Message-ID: <2050e606-97a5-4742-a433-9042c04a364c@e39g2000hsf.googlegroups.com>
On Sep 16, 6:10 pm, DA Morgan <damor..._at_psoug.org> wrote:
> macdba321 wrote:
> > On Sep 15, 4:52 pm, DA Morgan <damor..._at_psoug.org> wrote:
> >> 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:
> >>>>>> macdba321 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!
> >>>>>> How did you use "dedicated local storage disk" and make it shared
> >>>>>> everything?
> >>>>>> You've said nothing of CFS or ASM or RAW. Why?
> >>>>>> The biggest potential issue with a SAN is labeling the disks used
> >>>>>> for the voting disk and OCR so that they are mounted in the correct
> >>>>>> order by the O/S.
> >>>>>> --
> >>>>>> 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 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
> >> damor..._at_x.washington.edu (replace x with u to respond)
> >> Puget Sound Oracle Users Groupwww.psoug.org
>> > they serve as the "dedicated high-speed interconnect" that rac
> > Thanks again.
> > For a prototype effort though, I could proceed with single channel
> > HBAs on each node, correct?
> > One additional question, if the nodes have multiple NIC cards, would
> > requires?
>
> > Thanks!
>
> You should have a minimum of four interfaces.
> Two double port NIC cards and two dual channel HBAs.
> Again, bond so that you have two paths to public, two paths for cache
> fusion and two paths for storage (HBA).
> --
> 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
When you state "Two double port NIC cards and two dual channel
HBAs" ...... do you mean in total? (ie, 1 double-port NIC and 1 dualchannel
HBA per node?)
Also, for a completely prototype/testing/learning effort, what are the
drawbacks to using a single-channel HBA per node?
Thanks again!!!!!
(section 2.1.4 of OracleŽ Database High Availability Best Practices is the only applicable search result reference to "HBA" in the online documentation that I found.) Received on Wed Sep 17 2008 - 11:17:16 CDT