In
Linux There is a Way to Pause a Process. As a App Server Admin ,
during a Process of Sync the data on the disk to another as a
process For DR we need to use these options for pausing a Process
until the Data Sync is completed.
Linux
Contains Kill Command which can do some thing with a process. For
pausing a process we can pass a specific Signal to the Process.
As
to kill a process we send a SIGKILL to a process which kills a
process . In the same way we can send a SIGSTOP to pause a Process
like,
kill
-SIGSTOP 19564
At
this point when you check the Process State it moves to T1.I Paused a
Tomcat process and tried to access the manager console which could
not be loaded.
When
SIGSTOP is sent to a process, the usual behavior is to pause that
process in its current state. The process will only resume execution
if it is sent the SIGCONT signal. SIGSTOP and SIGCONT are used for
job control in the Unix shell, among other purposes. SIGSTOP cannot
be caught or ignored.
In
order to get the process back from pause we can issue the
kill
-SIGCONT 19564
In
short, SIGSTOP tells a process to “hold on” and SIGCONT tells a
process to “pick up where you left off”.
Happy
learning :-)
