RE: [SPAM] RAC Failover testing
- From: "Bobak, Mark" <Mark.Bobak@xxxxxxxxxxxxxxx>
- To: <anuragdba@xxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 25 Aug 2006 13:31:26 -0400
What happens if you do a shutdown abort instead...?
--
Mark J. Bobak
Senior Oracle Architect
ProQuest Information & Learning
Ours is the age that is proud of machines that can think and suspicious
of men who try to. --H. Mumford Jones, 1892-1980
________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Anurag Verma
Sent: Friday, August 25, 2006 1:17 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: [SPAM] RAC Failover testing
Importance: Low
Hi,
I am doing Testing on Oracle 9i RAC databases now.
Ours is a 2-node RAC on IBM HACMP with GPFS.
The TNS entry on the client side, I use is given below:
MYDB =
(DESCRIPTION =
(ENABLE=BROKEN)
(FAILOVER=ON)
(LOAD_BALANCE=ON)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST=RAC1.NODE1.com)(PORT=1521))
(ADDRESS = (PROTOCOL = TCP)(HOST=RAC2.NODE2.com)(PORT=1521)))
(CONNECT_DATA =
(SERVICE_NAME=FNWFI1)
(FAILOVER_MODE=(TYPE=SELECT)(METHOD=BASIC)(RETRIES=250)(DELAY=5))
)
)
For Failover testing, I connected to the first node, and ran a long
SELECT query.
When the SELECT runs, I shut down the instance in the first node, with
"shutdown immediate" command.
I get the following message.
======================================================================
ERROR:
ORA-01089: immediate shutdown in progress - no operations are permitted
960 rows selected.
SQL>
SQL> ex
ERROR:
ORA-25408: can not safely replay call
======================================================================
Here above, if I do not exit and check the V$instance, it shows the
session got switched over
to the surviving instance, even though the SELECT got stopped.
Why this is happening, as I am using (ENABLE=BROKEN) and (TYPE=SELECT)
options???
Surprisingly, the test succeeds on some other servers with the same DB
Physical structure
and memory parameters, by automatically failing over the SELECT query to
the surviving node, and without the
query being halted.
Is there any Operating System setting we need to set for successful
failover?
Thanks in advance,
Best Regards,
Anurag
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