linux - When to use upstart for Tomcat vs. Tomcat's Daemon Mode? -


according tomcat docs, tomcat can set - on linux/unix - run daemon. however, behave daemon, special configuration required beyond defaults tomcat ships with.

my understanding of true *nix daemon is background, non-interactive program, owned init process. typically, daemons scheduled background work , never driven input actual user.

here root of question: seems tomcat can given daemon-like behavior it's own daemon mode (first link above) or via number of built-in linux tools (upstart, init.d, systemd, etc.). means have 4 possible scenarios here:

enter image description here

on 1 hand, may choose use tomcat's daemon mode or not. may choose use built-in linux tool or not.

what i'm looking this: what use cases necessitate each of 4 scenarios depicted above? is:

  1. when use tomcat's daemon mode, and use, say, upstart?
  2. when not use tomcat's daemon mode, use upstart?
  3. when use tomcat's daemon mode, not use upstart?
  4. when use neither?

obviously, in questions, can replace upstart other tool (systemd, etc.).


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