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How many concurrent users can log into Infrastructure Manager at one time?


Article ID: 215423


Updated On:


DX Unified Infrastructure Management (Nimsoft / UIM) Unified Infrastructure Management for Mainframe CA Unified Infrastructure Management SaaS (Nimsoft / UIM)


How many concurrent users can log into Infrastructure Manager at one time?


Release : 20.3



On Windows, a hub can support a maximum of 64 subscriptions;  however, a good number of them are already taken up by the primary hub queues.

On Linux, a hub can support an unlimited number of subscriptions, but will be limited by the system resources.  The practical limit is about 100 subscriptions in most cases.

So - we can deduce the following from this:

- On a standard UIM primary hub, out of the box, when no queues are being connected, there are normally about 20 subscribers present from the various probes.

- So in this case we could expect to be able to have about 16 users maximum logged in to the primary hub in IM if it is a Windows hub
- However, in most cases primary hub has many queues to pull data from secondary hubs, so this number would get reduced depending on the architecture and there may also be performance concerns as the primary hub is already quite busy
- Therefore we would recommend that, if more than about 5-6 users will be using IM client simultaneously, you could set up a secondary hub parallel to the primary hub;  this hub would have a NAS on it, and bidirectional replication of alarms, and users could log into this designated "IM Hub"
- If this were a windows hub then it could support about another 20-25 users 
- If it were a Linux hub it could support about another 50 users.