IBM Spectrum Protect (TSM)
Node's client is counted if any of the following bullets apply:
The client is a media server or a primary server.
The client was backed up (or had a backup attempt) within the last 7 days. This includes decommissioned clients.
Counts all unique TSM clients for which any of the corresponding nodes on those clients have communicated with their TSM server/instance within the past 45 days (In TSM, this is NODES.LASTACC_TIME)