In this blog post i am trying to explain how we can use NetApp commands such as Take over and Give back in Active/Active Cluster mode configuration.
Active /Active cluster means, you should require 2 controllers and these two controllers should communicate each other. There would be a connection between these 2 controlelrs by using a connection.
We had requirement that we need to take offline of controller 2 ( which is our development LUN’s and CIFS volumes are connected)
We can use below commands to do the cluseter switch before we took the offline of controller2. Here is the command
First we need to check the status of the cluster ( is it enabled or disabled)
Controller1> cf status
Cluster enabled, Controller2 is up.
Controller1 > cf takeover
This command will take over the controller2 resource entirelly and will work continuosly with out any affect. User wouldn’t know this take over. Once you give this command you will log off from the controller2 session and it will be hand over to controller1 entirely.
Now controller2 is running and using the resource of controller1 and the performence you can decrese little bit. And the controller1 conole prompt will change to take over mode and lots of logs will come to the console.
Once your work is over you can return back by using below command
Controller1 ( takeover) > cf giveback
Always better to disconnect any user or appliaction before you take offline of any controller.
Hope this will helpfull somebody who is working in NetApp storage. Appreciate your comments and suggestions.