How Jobtracler stores tasktracker's information

[hadoop anis]

      Anyone please tell this,
      I want to know from where Jobtracker sends task(taskid) to
tasktarcker for scheduling.
      i.e where it creates taskid & tasktracker pairs



Thanks & Regards,

Mohmmadanis Moulavi

Student,
MTech (Computer Sci. & Engg.)
Walchand college of Engg. Sangli (M.S.) India