Home » Server Options » RAC & Failsafe » PRECONNECT and SELECT behavior ?
PRECONNECT and SELECT behavior ? [message #401501] Tue, 05 May 2009 04:55 Go to next message
tridentadm
Messages: 142
Registered: March 2006
Senior Member
In a a TAF connection with
FAILOVER_MODE = (TYPE=SELECT,METHOD=PRECONNECT)

would the result be that if a instance 1 were to go down the 'selects' run would continue to execute on 2nd instance.

While the sessions established on instance 1 would have same number of sessions established on instance 2.




Re: PRECONNECT and SELECT behavior ? [message #401513 is a reply to message #401501] Tue, 05 May 2009 05:58 Go to previous messageGo to next message
Michel Cadot
Messages: 59065
Registered: March 2007
Location: Nanterre, France, http://...
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Quote:
would the result be that if a instance 1 were to go down the 'selects' run would continue to execute on 2nd instance.

Yes... theorically

Quote:
While the sessions established on instance 1 would have same number of sessions established on instance 2.

I don't understand this sentence.

Regards
Michel
Re: PRECONNECT and SELECT behavior ? [message #401642 is a reply to message #401513] Tue, 05 May 2009 21:51 Go to previous messageGo to next message
tridentadm
Messages: 142
Registered: March 2006
Senior Member
Quote:

Quote:
While the sessions established on instance 1 would have same number of sessions established on instance 2.

I don't understand this sentence.

Regards
Michel




I meant to say :
eg.

Instance 1 has : 10 sessions
Instance 2 would have same 10 sessions established cause this is preconnect.


I believe if this is the case then the time would be saved if instance 1 were to fail, because already same number of sessions are established to the 2nd instance.

Re: PRECONNECT and SELECT behavior ? [message #401647 is a reply to message #401642] Tue, 05 May 2009 23:03 Go to previous message
Michel Cadot
Messages: 59065
Registered: March 2007
Location: Nanterre, France, http://...
Senior Member
Account Moderator
Yes there will be the same sessions on other node.

Regards
Michel
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