Re: Alias VIPS to SCAN
- From: Freek D'Hooge <freek.dhooge@xxxxxxxxx>
- To: stojan.veselinovski@xxxxxxxxx
- Date: Wed, 30 Apr 2014 08:51:16 +0200
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
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