On Fri, 23 May 2008 08:59:40 -0500, McKown, John <[EMAIL PROTECTED]> wrote:
>I write a lot of code in REXX. I also like Perl, but rarely use it on >z/OS. Anyway, I was just trying to think (hard on the lead in to a 3 day >weekend in the states). Would I gain very much if I subset my input file >using DFSORT instead of subsetting in my REXX code. My example in this >is the output from IRRDBU00. That creates a "flat file" unload of the >RACF database, which I use to write a report. I use the 0200 records. In >my shop they account for less than 5% of the records in the file. Seems >to me that using DFSORT to subset the data, even if only used once, >would result in less CPU, I/O, and elapsed time. What say ye? > In a word - YES. I'm sure you know that sort is much more efficient for this. It's just a matter if it is worth your time to bother. Size does matter here - (5000 records total, 20,000, 10,000,000, etc.) Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:[EMAIL PROTECTED] z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
