I am trying to understand tick lines in Fig 2 on Page 2 of "Time, Clocks, and the Ordering of Events in a Distributed System" paper . Below are 2 things which I did not understand
What is the relation between the total no of tick lines and the events on different processes? According to his explanation (i) there must be a tick line between any two events on a process line and (ii) every message line must cross a tick line. Did he choose the minimum number of tick lines which satisfied the above stated conditions for the events on different processes? Or did he choose an arbitrary number of tick lines Or something else?
Why is the spacing between tick lines un-even in that picture?