Re: Alias VIPS to SCAN
- From: Stojan Veselinovski <stojan.veselinovski@xxxxxxxxx>
- To: "Freek D'Hooge" <freek.dhooge@xxxxxxxxx>, ORACLE-L <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 1 May 2014 10:50:29 +1000
Thanks Freek.
The client version hadn't crossed my mind. I guess I'm looking for reasons
to not go down this road and make sure everyone upgrades, changes config
and uses scan.
Regards,
On Wed, Apr 30, 2014 at 4:51 PM, Freek D'Hooge <freek.dhooge@xxxxxxxxx>wrote:
> Stojan,
>
> At first sight I think it will work, but probably you will get some delay
> when the scan is down as your client will retry the connection (failing
> over to oldserver2-vip).
> But keep in mind that you need an 11.2 client / libarary to be able to
> work with scan (and failover correctly), so it could be that you need to
> upgrade the application anyway.
>
> Despite it will probably work, I would advice to change the configuration
> and use the scan directly as these quick fixes like aliases have a bad
> habit of coming back to bite you in the butt.
>
> Kind regards,
> --
> Freek D'Hooge
> Exitas NV
> Senior Oracle DBA
> email: freek.dhooge@xxxxxxxxx
> tel +32(03) 443 12 38
> http://www.exitas.be
>
> On wo, 2014-04-30 at 15:40 +1000, Stojan Veselinovski wrote:
>
> Hi All,
>
>
>
> We are in the process of looking at migrating some older legacy RAC
> systems to a new 12C GI on Solaris T4. One of the challenges we are facing
> is getting any level of application change including connect strings.
>
>
>
> A proposal we are looking at is to alias the old vips to point to the
> new SCAN. The thinking is all should work ok behind the scenes without much
> change. Haven't really got my head across what happens with failover and
> load balancing or even if its doable. It'll look somethign like this
>
>
>
> oldserver1-vip oldserver2-vip
>
> | |
>
> | |
>
> | |
>
> 12C-RAC-SCAN
>
>
>
>
>
> Any thoughts?
>
>
>
> --
>
> Stojan
>
> www.stojanveselinovski.com/blog
>
> www.stojanveselinovski.com
>
>
--
Stojan
www.stojanveselinovski.com/blog
www.stojanveselinovski.com
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