TAF and time-outs TCP - AMT Config - VIP

Hi all

I'm reviewing a configuration of 11 g Dataguard (1 primary-> 1 physical standby) 2. I was just curious, given the underside of tns, wouldn't the customer receive/wait for a TCP time-out after 3 minutes if the main server was actually full down.

Here if the scenario, I do a permutation of primary eve-> all the links already connected are passed to the first new using TAF.
Now, all those already connected before the swtichover are ok, but the news of the day before (primary source) is now completely down, I have to change the entry of TNS for use instead of the VIP for new connections not TCP timeout?
POMS=
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = orap01.intm.com)(PORT = 1521))
    (ADDRESS = (PROTOCOL = TCP)(HOST = orap02.intm.com)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = POMSDG.mf.galderma.com)
    )
  )
Below is a reference Tom Kyte, but I was wondering if anyone else had already implemented it.
Here it solution:
-----------------
1) tnsnames.ora entry will have connect time failover configured for primary and standby.

2) If primary database is down but primary node is up. The above will work fine. 

3) But if primary database is down and primary node is also down. The each attempt to connect using 
tnsnames.ora will go through a TCP timeout. 

solution for 3:

b) On another node in primary subnet - bind/start the Failed database node IP. This can be done via 
a script.
Make sure to shut this down, when bringing up the failed primary node. (This is kind of a manual 
VIP failover)
Thank you in advance for your advice or assistance in this case.

Jan S.

Hello

Read this white paper:

http://www.Oracle.com/technetwork/database/features/availability/MAA-WP-11gr2-client-failover-173305.PDF

... and if you still have questions post again.

Concerning
Sebastian

Tags: Database

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