RE: Oracle RAC cost justification?

From: Tapan Trivedi <taptriv_at_yahoo.com>
Date: Sun, 5 Jun 2005 13:19:23 -0700 (PDT)
Message-ID: <20050605201923.98452.qmail@web50801.mail.yahoo.com>

Has anyone implemented 'true TAF' i.e. TAF that works with updates, deletes and inserts as opposed to just selects. I know it is not supported but there are ways around it. Has anyone done it. I don't see how a business can do just selects and be OK justifying the cost of RAC. Does anyone have an application that does JUST SELECTS then it will be a true Transparent Application Failover - does anyone ? Raj, can you maybe discuss a little bit about the way your application works ? Tapan Trivedi

David <thump_at_cosmiccooler.org> wrote:
It works fine...
Users get errors and have to reconnect.
If that is okay, then that is cool.
For what I do though, that is unacceptable.

My point is I bet you can accomplish the same without RAC.

-----Original Message-----
From: oracle-l-bounce_at_freelists.org =
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On Behalf Of rjamya
Sent: Sunday, June 05, 2005 5:55 AM
To: thump_at_cosmiccooler.org
Cc: mgogala_at_allegientsystems.com; tim_at_evdbt.com; Oracle Discussion List Subject: Re: Oracle RAC cost justification?

We do and I can tell you, if implemeted correctly, it works fine. = Hundreds=20
of our users who rely on split-second response times do not even know if =

their application gets moved from one node to another. Might be because = for=20
such critical sessions we do pre-connects. but yes, it works. For=20 applications it is usually few seconds when they get errors and have to=20 connect again.
Raj

On 6/2/05, David wrote:

>=20

> Who is using TAF here?
> Does it work seamlessy or transparantly? No issues?
> If you lose a node/instance, what happens next? Is there any impact on =

> the others heads in terms of smon/eviction? How long does it take to=20
> get the application to start hitting an instance an another node?
>=20
>=20

select standard_disclaimer from company_requirements where category =3D=20 'MANDATORY';

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Tapan Trivedi
Senior Oracle DBA
916 613 1921 
 

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Received on Sun Jun 05 2005 - 16:25:16 CDT