Oracle Database Discussions

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!