FAILOVER - which TNSNAMES should be updated - Client's or Database's
Hi All,
I have installed a two node cluster and want to configure TAF , my questions are
1. Do I need to insert the following only in db TNSNAMES or in clinet TNSNAMES as well?
(LOAD_BALANCE = ON)
(FAILOVER = ON)
FAILOVER_MODE =
(TYPE = SELECT)
(METHOD = BASIC)
(RETRIES = 180)
(DELAY = 1)
2. I created the database through dbca , can i configure the default database service for TAF or do I have to make another service. This is what I get when I try to check the status of default service
C:\Documents and Settings\OnyxAdmin>srvctl status service -d usis -s usis
PRKO-2120 : The internal database service usis cannot be managed with srvctl.
Please help.
You can configure TAF without any additional services.
Use the same TNSNAMES file on client and database. It contains an entry for
RAC_INST =
(description =
(failover = yes)
(address_list =
(load_balance = off)
(address= (protocol = tcp)(host=vip-inst1)(port=1521))
(address= (protocol = tcp)(host=vip-inst2)(port=1521))
(connect data =
(server=dedicated)
(service_name=RAC_INST.blah.blah)
(failover_mode =
(backup = RAC_INST2)
(type=select)
(method = preconnect)
(retries=1)
(delay=1)
Same entry for RAC_INST1, still specifying RAC_INST as the service, still specifying RAC_INST2 as the backup
Same entry for RAC_INST2, still specifying RAC_INST as the service, but RAC_INST1 as the backup & swap the vip-addresses in the list.
There's also entries for the listeners:
LISTENER_RAC_INST =
(address_list =
(address= (protocol = tcp)(host=vip-inst1)(port=1521))
(address= (protocol = tcp)(host=vip-inst2)(port=1521))
Same entry for LISTENER_RAC_INST1
Same entry for LISTENER_RAC_INST2, but swap the vips around.
You may need to use VIP actual IP addresses on the clients if you can't connect...there's something on metalink on that but I can't quite recall.
I figured this out after some trial and error - hope it works for you as well.
Gavin
Edited by: Gav Scott on 4/12/2008 19:55
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