Asynchronous Processing without SAS waiting for child to terminate

Patrick — Mon, 06 Sep 2021 10:08:09 GMT

What I've got
- Process 1 (not SAS) calls process 2 (SAS) synchronous
- Once process 2 complete, process 1 does a few more things

What I need
- Call from process 2 some 3rd process (a SAS program) that only executes once process 1 is complete (not pretty but a simple sleep() will do to ensure that process 1 finished).

Challenge

SAS process 2 needs to finish (feed back to process 1 that finished) even though SAS child process 3 is still executing.

I've tried to call this process 3 using rsubmit asynchronous but it appears the #2 SAS process is still waiting for #3 to finish before it "tells" #1 that it's done.
What I need is a way where #2 doesn't wait before it tells #1 that it's done.

Right now "best" I could do is for #2 not to wait - but this then also terminated the #3 child process with error as it wasn't done yet.

The only idea I've had so far that might work is for #2 to create a token file used by a scheduler as trigger to start #3. ....but I'd prefer to call #3 via rsubmit or some X command or similar.

Any suggestions based on actual implementation experience highly welcome.

And: The way Process #1 and #2 interact is not under my control and can't be changed.

Environment: A current SAS9.4 version under RHEL, no lsf.

Re: Asynchronous Processing without SAS waiting for child to terminate

ChrisNZ — Mon, 06 Sep 2021 23:03:39 GMT

Have you tried launching a system command with ampersand and either nohup or maybe disown ? See here

Re: Asynchronous Processing without SAS waiting for child to terminate

Patrick — Tue, 07 Sep 2021 01:31:33 GMT

@ChrisNZ Haven't tried that yet but certainly worth doing.

What do you mean by "a system command with ampersand"? Anything different from an X command or similar?

Re: Asynchronous Processing without SAS waiting for child to terminate

ChrisNZ — Tue, 07 Sep 2021 01:39:55 GMT

Sorry if my wording was a bit too terse. I meant this.

topic Re: Asynchronous Processing without SAS waiting for child to terminate in SAS Programming

Asynchronous Processing without SAS waiting for child to terminate

Re: Asynchronous Processing without SAS waiting for child to terminate

Re: Asynchronous Processing without SAS waiting for child to terminate

Re: Asynchronous Processing without SAS waiting for child to terminate