Automatic and manual failover

[Wendy_9]

Hi all,

I want to know the difference between the mechanism behind halt the node to make the package automatically failover and manually halt the pacakge in one node, then restart the package on the other node. Because, in two case, the application connect to the node has received different error.

Thanks

Regards,
Wendy

[A. Clay Stephenson]

Hi Wendy:

If you stop to think about it a moment you will realize that your question is far from simple. If you do a cmhaltpkg that is a normal graceful package halt. Depending on what your package scripts do, a nice message might be sent to each client. Now for the automatic failover case, a meteor might have fallen on the node ,in which case, I doubt that the connected clients would get any kind of message.

MC/SG can't guarantee a nice, clean failover from the client's point of view. It does guarantee that the service will be restored to the same IP address in a reasonable period of time. How a client deals with the timeouts and other messages is up to it.

Food for thought, Clay