I have two process P1 and P2. I want to ping from P1 to P2 to tell P2
that it is alive and working. How do I do that?
I have two process P1 and P2. I want to ping from P1 to
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I have two process P1 and P2. I want to ping from P1 to P2 to tell P2
that it is alive and working. How do I do that?
On the same machine (assuming there is a file system), you could use a “heart beat file”. Have P1 update the file with the current time-stamp periodically, and P2 can check if that gets too old. You can also write the P1 process id in there, and P2 can check if that pid is still alive.