Please describe a common usage of one of the logged in users. Will they be doing lots of pubsub, lots of server2server, lots of MUC, lots of presence, etc.
OK, I would think a having 3-4 beefy modern servers would be sufficient to meet that load, but you would want to figure out a way to produce a test load against that cluster to see how it performs. There is no magic performance metric for openfire, it entirely depends on the workload the users generate. Some operations are very ‘expensive’ and some are not.
Hey Christophe, I was wondering whether have you found an answer to this? I’m planning to scale this up to nearly the same levels
Curious to know
which type of hardware are that you have them running on?
are the machines hosted VMs in like AWS?
how many machines are there in the cluster?
what types of storage provider have you setup? I’m assuming the default MySQL setup
what level of XMPP activities (message/min) does it demand on the cluster
A couple of thoughts
Have you dabbled with the Connection Manager? You can offload and scale horizontally by having the connection manager be able to hold on to more concurrent connections in front of the cluster
How about using HA Proxy or Nginx in front of each instance to help manage and queue the connections?
If the machines are Linux, was the system limit config upp’ed for the openfire user?
Assuming the OpenFire cluster is hooked to MySQL, I’d tweak that quite a bit depending on the hardware and disk