HI Mark
This is strictly guesswork
You are assuming it is ONLY looking at that one directory
Is there a chance it's looking at ALL directories?
Sent via the Samsung GALAXY S® 5, an AT&T 4G LTE smartphone
-------- Original message --------
From: mlazarus <mlazarus@xxxxxxxx>
Date: 6/18/17 5:08 PM (GMT-05:00)
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Subject: QShell performance
I am attempting to do renames in an IFS folder using a wildcard
pattern. The native IFS commands to not seem to allow wildcards, so I
adapted this from a tip published by Ted Holt.
The code is:
QSH CMD('cd /usr/Mark/Downloads/;for file in *.n37;do mv "$file"
"$(basename $file n37)h37";done')
It was taking a long time, so I pared it down to this statement as a test:
QSH CMD('cd /usr/Mark/Downloads/;for file in *.h37;do ls
"$file";done') from the command line.
There are 54 entries out of 56 (plus . and ..) that match the
pattern. It took over 1/2 minute to display the first entry. The
entire run took about 14.5 minutes. So it's averaging 25-26 seconds per
entry. This is on a lightly utilized v7r3 Power8, that is quite fast
for most other operations.
1) Can someone explain what it's doing for it to take so long?
2) I assume there's a much better alternative. I'm looking for ideas to
do this with a minimal amount of code.
TIA.
-mark
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