In certain computing circles, "clustering" is a dirty word. I've heard of situations where, far from providing business continuity peace of mind, it creates more work and greater risk than it would if it were not involved.
This is not the case with Domino clustering. Done properly, it is extremely reliable
Recently, our cluster seems to have "picked up a slight flutter". Actually, I think that perhaps the rules behind it may have changed sometime around our 8.0 or 8.5 migration.
So, first I want to cover off basically what our cluster looks like;
Ok, this is quite a simplistic view and there are servers missing. I'm concentrating on the problem area only.
We have an onsite and offsite clustered Lotus Domino server, both running Lotus Domino 8.5 HF 1021. We'll call them "Onsite" and "Offsite" for ease of reference. The servers are quite a distance apart because we're clustering for business continuity purposes.
The theory is that our onsite staff members should access the onsite server unless it is down. The majority of our agents also run on this server, as does an intranet, extranet and several web sites. It's a busy and powerful box.
We discovered recently that many of our clients have been using the offsite server but we don't know exactly why.
It seems that if you open a database for which you don't already have a desktop icon, then the Notes client will default to opening it from the offsite server. What has exacerbated this problem is that we upgraded our clients to 8.5.1 and blew away their desktops. Now, suddenly all the computers are trying to access everything off the offsite server.
We don't know but were thinking that it was either;
- Alphabetic: Because "Offsite" is lower in the alphabet than "Onsite"
- Task Related: Because the Onsite server is much busier than the offsite one.
Does anyone have any ideas as to how we could go about finding out?