Greetings,
Excellent advice!
Regards,
Paul
On Wed, 18 Apr 2018, John Campbell wrote:
Date: Wed, 18 Apr 2018 12:27:29 -0400
From: John Campbell <[email protected]>
Reply-To: Linux on 390 Port <[email protected]>
To: [email protected]
Subject: Re: Bash not lest you be bashed...
Easy cheat:
Use the "env" (or printenv) command to capture your "live" shell
environment to a file.
Edit out chunks you don't think you need for a "batch" process.
Sprinkle in appropriate exports.
Insert this in the front of your cron job's script.
Note: I have seen cases where cron jobs weren't (ahem) "punctual";
Writing for a cron, however, means a different mindset from writing a
daemon process.
-soup
On Wed, Apr 18, 2018 at 12:16 PM, Paul Flint <[email protected]> wrote:
Dear David,
If you are periodically waking to take data, then you really need to be
using "crontab" as it is essentially built for this type of behavior.
The gotcha with crontab is that you need to establish environment
variables as part of your program's execution. If you would like I shall
endeavor to remember the angle on this.
Once it is running you can say pretty much any interval you would like.
Once you beat the environment variable issue, crontab can be very "nice"
(no pun intended :^)
Regards,
Flint
On Wed, 18 Apr 2018, Dave Jones wrote:
Date: Wed, 18 Apr 2018 06:36:36 -0700
From: Dave Jones <[email protected]>
Reply-To: Linux on 390 Port <[email protected]>
To: [email protected]
Subject: Linux "sleep" command not waking up under high CPU utilization
Hello, gang.
I have a very simple bash script that runs a trivial data collection
task, and then does a Linux "sleep im" to wait a minute before running
the data collection task again. Under very high CPU loads (> 90%) I have
noticed that the "sleep" command does not seem to wake up after one
minute but instead wakes up 15 to 20 minutes later. This is on a Red Hat
6.9 guest running under z/VM 6.4 on a z12 box.
I would like to buy a clue here if I could.
Thanks.
DJ
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Kindest Regards,
☮ Paul Flint
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com
MacOS X proved it was easier to make Unix user-friendly than to fix Windows
"It doesn't matter how well-crafted a system is to eliminate errors;
Regardless
of any and all checks and balances in place, all systems will fail because,
somewhere, there is meat in the loop." - me
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Kindest Regards,
☮ Paul Flint
(802) 479-2360 Home
(802) 595-9365 Cell
/************************************
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Paul Flint
17 Averill Street
Barre, VT
05641
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