Re: QShell performance

If you have 5733OPS with recent PTFs installed, you could use bash, which would allow you to accomplish what your after. I just tried it on a test box at V7R3 and it processed 500 files in about 5 seconds.

Jim Oberholtzer
Agile Technology Architects
Office: 414-433-4363
Cell: 414-915-1445
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"I've learned that courage is not the absence of fear, but the triumph over it. The brave man is not he who does not feel afraid, but he who conquers that fear". -- Nelson Mandela

On Jun 18, 2017, at 4:07 PM, mlazarus <mlazarus@xxxxxxxx> wrote:

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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