Hi PierreC,
unfortunately there is no clear sizing guidance available that I know of.
OCUM scales pretty well, depending on the CPU and memory resources available to the server or VM.
E.g. I just talked to a customer running OCUM 7.3P1 that has 180 nodes (not a typo) being monitored by a single OCUM server.
In the end it's the overall number of objects in the DB that counts, not an individual number of clusters or nodes.
Sorry that I can't be more specific, but it should give you confidence to be able to add >48 nodes to a single OCUM instance.
Kind regards, Niels
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