Slow? compared to what? If my mainframe was ever "slow", I'd be complaining about performance issues. No cpu cycles? Swapped out? I do the bulk of my largest REXX process during off peak hours, and processing 1 million 4096 VB records usually takes 2-3 minutes. I do not consider that slow (about 10,000 records every couple seconds). Peak hours, maybe 10-12 minutes as my stuff isn't production and gets a lower priority.
I find it helps helps to zero out each record after its processed if using stem variables, and not using stemvars for large files, instead read/write one record at a time. Less region, less paging, less time swapped out. If you're only doing 1 member, the JCL IEBGENER option would appear viable, but if you're only doing 1 member, heck, just edit it. Oh, I left out one very important to in the psycho code, do a DROP stemvar after each write, otherwise, each member ends up having the same number of records as its longest predecessor. and if it needs to be said, don't overwrite the input file... --- On Tue, 2/15/11, Veilleux, Jon L <veilleu...@aetna.com> wrote: > From: Veilleux, Jon L <veilleu...@aetna.com> > Subject: Re: Adding Lines to End of Member > To: IBM-MAIN@bama.ua.edu > Date: Tuesday, February 15, 2011, 7:31 AM > The only issue I have with REXX > (which I love using) is that I/O tends to be fairly slow, > otherwise I would agree that it is the best solution. > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] > On Behalf Of Cris Hernandez #9 > Sent: Monday, February 14, 2011 4:06 PM > To: IBM-MAIN@bama.ua.edu > Subject: Re: Adding Lines to End of Member > > I vote for the REXX option. > > Use LISTD after an OUTTRAP to capture a list of > members, DO loop thru the list, allocate the dsn/member, > readin, add the 2 lines to the end by adding to a counter > and setting the needed value to the stemvar, and then write > back out. > > > > > > > > > > --- On Mon, 2/14/11, Adam Johanson <adam.johan...@usaa.com> > wrote: > > > From: Adam Johanson <adam.johan...@usaa.com> > > Subject: Adding Lines to End of Member > > To: IBM-MAIN@bama.ua.edu > > Date: Monday, February 14, 2011, 12:03 PM I've got to > change about > > 1,000 members of a PDS containing JCL by adding > > 2 lines to the end of each member. > > > > I thought there might be a way to do this with > IEBUPDTE, but he > > requires sequence numbers, which a lot of the members > don't have. > > And it also looks > > like you can't just tell him something like, "sequence > number = last". > > > > Is there any way to do this with another > utility? I'd like to do > > this with standard MVS utilities, but if it winds up > that we need to > > use a REXX program to do it, then we can go that > route. > > > > Thanks. > > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access > instructions, send > > email to lists...@bama.ua.edu > with the message: GET IBM-MAIN INFO > > Search the archives at http://bama.ua.edu/archives/ibm-main.html > > > > > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access > instructions, send email to lists...@bama.ua.edu > with the message: GET IBM-MAIN INFO Search the archives at > http://bama.ua.edu/archives/ibm-main.html > This e-mail may contain confidential or privileged > information. If > you think you have received this e-mail in error, please > advise the > sender by reply e-mail and then delete this e-mail > immediately. > Thank you. Aetna > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access > instructions, > send email to lists...@bama.ua.edu > with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
