Techcello only license on Developer (How many desktops/development machines used) & Production License i.e Physical/virtual (How many production servers used). Techcello doesn't license the database servers (shard or not shard).

Note: Techcello's production server licensing do not differentiate the size of the hosting servers i.e. w.r.t any cloud all small/medium/large/extra large servers are considered one and the same