Enable/DIsable Services in RAC Database using srvctl

Question

Hello,
I am using Oracle Database 11g on a two node RAC. For the service management on the RAC I use srvctl and I have problems in understanding why the tool offers redundant information for some services.
To be more exact, let's say I have a two node RAC, one database called DB_NAME and one instance on each node called DB_NAME1 and DB_NAME2.
I create a service called DB_SRV using srvctl like this:
srvctl add service -d DB_NAME -s DB_SRV -r DB_NAME1 -a DB_NAME2
Then I run srvctl config to see service parameters like this:
srvctl config service -d DB_NAME -s SRV_NAME
And I get the output:
Service name: DB_SRV
Service is enabled
Preferred instances: DB_NAME1
Available instances: DB_NAME2
So I can see that the the service DB_SRV is enabled by default, and I want to disable the service, like this:
srvctl disable service -d DB_NAME -s DB_SRV -i DB_NAME1
After than I run srvctl config again:
srvctl config service -d DB_NAME -s SRV_NAME
And I get the output:
Service name: DB_SRV
Service is enabled
Preferred instances: DB_NAME1
Available instances: DB_NAME2
Service is disabled on instances: DB_NAME1
So far,it all makes sense. The service is enabled to all the instances, but disabled for DB_NAME1 so this means the the service is enabled on DB_NAME2. All ok.
But then, I want to enable the service on DB_NAME2 (although it is already enabled there) and I run:
srvctl enable service -d DB_NAME -s DB_SRV -i DB_NAME2
After than I run srvctl config again:
srvctl config service -d DB_NAME -s SRV_NAME
And I get the output:
Service name: DB_SRV
Service is enabled
Preferred instances: DB_NAME1
Available instances: DB_NAME2
Service is enabled on instances: DB_NAME2
Service is disabled on instances: DB_NAME1
So my real question is:
Why isn't oracle giving me an error when I run
srvctl enable service -d DB_NAME -s DB_SRV -i DB_NAME2
and instead adds this line (redundant, I would say)
Service is enabled on instances: DB_NAME2
in the srvctl config output?
Thank you in advance!

Answer 1

So for me it seems redundant because if the service is enabled (this means it is enabled for every instance in the RAC), you shouldn't be able to enable it on one of that instance again.
So in my last output I think that this line:
Service is enabled
is equal to this line
Service is enabled on instances: DB_NAME2
If I am wrong, can someone point the difference between the two lines based on my scenario?
Edited by: 881081 on Aug 23, 2011 8:53 AM