- Ease of deployment
- Number of platforms you are able to monitor
- Collection of both long term reporting data and immediate alert data
- Depth of configuration of the alarm processor
UIM supports AS400, but it is somewhat limited.
I've used it for 10 years.
No issues encountered.
No issues with the recent versions, and v8.2 is very stable.
Only in database configuration. It needs a lot of planning before the initial install, and our database is over 2TB in size, and was not installed correctly, although this was my fault, and not that of CA.
We used Nagios in our early years, and we switched because of the power.
It was very simple.
It was done in-house.
I don’t love UIM, but it is the best selection for a multi-tenant infrastructure where SLA’s are a must. The original deployment was very successful, but this is not plug & play. At least one full time administrator is needed. With acquired experience, the product can do almost everything a monitoring product should do, but it is not all “out of the box”