Hi, Nick
When you press the Test Failover button, the master node demote itself from
master to backup, pause 3 seconds, then proceed as usual to listen for
other masters and promote itself if necessary, depending of the cluster
type selected:
When you choose the cluster type where any both nodes can be master, the
node 1 will be backup and the node 2 will be master till you push the Test
Failover on node 2 or node 2 fails. This let you make changes to the node 1
for maintenance.
When you choose the cluster type where node 1 is master and node 2 is
backup, the node 1 will be backup and the node 2 will be master only for 3
seconds. After 3 seconds from you push the Test Failover button, node 1
promote again to master and node 2 demote to backup after few seconds. This
only let you know that cluster is well configured.
I hope the behaviour of the ZLB when you press the Test Failover is now
clarified.
Of course all your suggestions are wellcome and are now in our TODO list.
Thank you very much, Nick and best regards.
2012/2/8 Nick Furnell <[email protected]>
> Hi Guys
>
> Just a question.. I have just re-read the target 'Bug fix' for version
> 2rc2 and noticed a change to the 'Force failover' to 'Test failover' text
> button.
>
> This will be following feedback (from others and myself) that the process
> flip flops between the 2 nodes.
>
> Can you please clarify what the exactly new functionality will be? As the
> reason for the original suggestion by myself, was to enable maintenance to
> happen on the 'master' node - as the only alternative is to disconnect or
> power the 'master' off, which defeats the object of the exercise.
>
> Testing failover is good, but you need to be clear as to what happens when
> the button is pressed! In my opinion these two functions are completely
> different:-
>
> - Force Failover - The 'master' node is disabled and the 'backup' node
> takes on the role of servicing the farm traffic.
> - Test Failover - Either the 'master' node temporarily passes control
> of the farms to the 'backup' node OR the farm traffic stays where it is and
> some sort of token is passed across to the 'backup' node, BUT this is sort
> of taken care of by the summary screen??
>
> In a perfect world, it would be nice to be able to fail over individual
> farms between the two nodes - this combined with the real server
> 'maintenance mode' would make the product very flexible.
>
> Thanks
> Nick
>
>
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