Re: Not to use SCAN in 11gR2 RAC
Date: Fri, 16 Oct 2009 12:09:50 -0700
Message-Id: <C7DE122E-8998-4602-B23A-E1F4303EB766_at_dannorris.com>
I would be careful about disabling or stopping it. Not necessarily because doing so will break anything, but more for patches, upgrades, or the potential that a future release may make it mandatory and then you'd have to figure out how to recreate and/or re-enable them.
As the SCAN listeners have relatively low system requirements, I would leave them there. I haven't seen official notes on it, though they may exist. This is just my opinion.
Dan
Typos included courtesy of large thumbs.
On Oct 16, 2009, at 11:59 AM, Yong Huang <yong321_at_yahoo.com> wrote:
> We installed 11.2.0.1 RAC on a RHEL 5.3 two-node cluster
> successfully. It looks like SCAN (Single Client Access Name) must be
> assigned during installation.
>
> We have a company-wide OID to serve DB connection strings for
> thousands of clients. Each entry has load_balance=yes. It works very
> well. We're OK with continuing to use long strings (i.e. multiple
> address lines for each OID entry). Therefore we don't think SCAN
> provides benefit for our environment. Can anybody think of any risk
> or loss of benefit we haven't thought of? Is there any way to
> completely bypass it, not even bothering our DNS admin to create an
> entry (one or three A records)? If not during installation, can I
> stop the SCAN listener and shutdown its network interface (if I can)
> and remove it from OCR?
>
> Oracle says SCAN is optional unless you use policy-managed database
> in 11gR2. But it actually becomes mandatory at the time of
> installation, and then it can be optional afterward. Isn't that
> awkward?
>
> Yong Huang
>
>
>
>
> --
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>
>
-- http://www.freelists.org/webpage/oracle-lReceived on Fri Oct 16 2009 - 14:09:50 CDT