[Freeswitch-users] Recording questions

Hi, Im messing arround with FreeSwitch after the * AMI interface gave me a couple of head and heartaches. Got some call routing today and had loads of fun messing with everyone in the office, of course all of this has to lead somewhere and to that end I'm wondering what the differance is between recording a session, recording a uuid and recording a conferance. are there major CPU or Disk usage variations? I see that recording a uuid does also mix all legs together, does that hold if that uuid is in a conferance as well? or is the conferance record function the way to go if that is the intension? Thanks in advance, Sias