Have you ever had a set of cluster servers fail – perhaps due to a hardware outage? And iNotes users on those servers are no longer able to connect to their primary server or automatically failover to their cluster mate.
Or if you’re doing maintenance on one set of cluster servers, and want to have your iNotes users connect to their cluster mate during the maintenance period, you can do that. Here’s how.
If you are using the iNotes Redirect database based on the iwaredir.ntf template, you can make the following modifications to the database which will replace the server name in the URL string with the corresponding cluster server name.
In the database, find the AutoLogin Form. It contains a field called $$HTMLHEAD. The $$HTMLHEAD field builds the URL string to direct Domino to the server and database name of the user.
In the formula language of this field, look for the following lines of code:
Replace the code with the following:
What this will do is replace the following in your URL string:
ClusterServer101 is replaced by ClusterServer201
ClusterServer102 is replaced by ClusterServer202
ClusterServer103 is replaced by ClusterServer 203
Thus the user will be redirected to their mail file on the cluster mate without having to take any action or even realize that they have been “redirected” to their cluster server.
We have used this method for 5 years in a very large cluster environment. Our code is a little simpler as we have distinct names for the Servers between clusters, so we only have to use the following code:
This recently was put to the test when a colleague of mine was able to use the same code during a disaster situation when approximately 3000 iNotes users were unable to access their mail. Once he implemented this code, they were seamlessly redirected to the cluster set that was available and continue with their work! And when he shared the code with IBM Support…their response was “brilliant!”