On Fri, Mar 26, 2010 at 9:05 PM, McKown, John <john.mck...@healthmarkets.com > wrote:
> > -----Original Message----- > > From: IBM Mainframe Discussion List > > [mailto:ibm-m...@bama.ua.edu] On Behalf Of Sam Siegel > > Sent: Friday, March 26, 2010 4:01 PM > > To: IBM-MAIN@bama.ua.edu > > Subject: Re: An amusing REXX program - JES2DISK == copies JES > > output to disk using REXX's SDSF API > > > I beg to differ on this one. Unix ages more gracefully > > because for many > > years the source code was available at universities at no cost. This > > created legions of programmers and instructors. These people > > carried unix > > forward into the commercial world. > > Very true. And it's why Linux is advancing so well today. > > > > > Jes is an extremely poor point in fact. Take a look at the > > native equivalent of jes on unix and you will find (I'm > > pretty sure) that it > > does not even exist. > > Also true. UNIX was originally designed for interactive use. It is not very > good at what we would think of as "batch" work. It would be as if the > original OS/360 started off with TSO, not batch. > Then there are things like checkpoint restart. On unix, that is "something the database does". There is now OS level facility that lets you restart where you left off. There are also file system issues. It seems lately that there have been many comments regards ckd disk, etc. Consider the flip side. Unix does not have anything close to vsam. If you want keyed file access, you either use a database, ryo or purchase a third party product. Vsam goes a long way to solve many problems. Most unix developers are very surprised at vsam's capabilities. Tapes and tape management are woefully lacking on unix. There are still many cases, outside of backup, were tape plays an important role. With a unix system, using tape is difficult at best. Take a look at JCL. Many unix developers don't see the true facility of JCL. That is indirect specification of resources. JCL (svc 99, etc.) allows a program to address different input and output as well as printers and other external devices without the underlying program knowing which specific resource is being used. On Unix you must pass very specific information to fopen or open to obtain the resource. A "smart" program can read this information from a configuration file or via environment variables. However, there is no standardized way of doing this. This makes every "production" job on a unix machine that much more difficult to manage. Regards, Sam > > > > > Job logging, job classes, sysout management, resource > > allocation. These are > > quite foreign concepts to the unix world. You need to buy > > this stuff or > > RYO. > > > > Regards, > > Sam > > > > > -- > John McKown > Systems Engineer IV > IT > > Administrative Services Group > > HealthMarkets(r) > > 9151 Boulevard 26 * N. Richland Hills * TX 76010 > (817) 255-3225 phone * (817)-961-6183 cell > john.mck...@healthmarkets.com * www.HealthMarkets.com > > Confidentiality Notice: This e-mail message may contain confidential or > proprietary information. If you are not the intended recipient, please > contact the sender by reply e-mail and destroy all copies of the original > message. HealthMarkets(r) is the brand name for products underwritten and > issued by the insurance subsidiaries of HealthMarkets, Inc. -The Chesapeake > Life Insurance Company(r), Mid-West National Life Insurance Company of > TennesseeSM and The MEGA Life and Health Insurance Company.SM > > > > ---------------------------------------------------------------------- > 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
