I think it's excused if machine fulfills more than one function at once or needs some distinctor among many that fulfil similar function. If it is a LDAP serve

I think it's excused if machine fulfills more than one function at once or needs some distinctor among many that fulfil similar function. If it is a LDAP server in DC1 it should just be "dc1-ldap" or "dc-ldap1" if you have few in redundancy (with actual service being either under "ldap" or "dc-ldap"). But if it is a kitchen sink server running a bunch of services, eh, mjollnir will do, and if you do "ssh ldap" you will ssh to server that hosts LDAP service, regardless of what cute name it will have