On 20 Jul 2006 01:38:32 -0700, in bit.listserv.ibm-main you wrote: >----- Original Message ---- >Hi, >Would anyone have a project plan for doing the above or any pointers to >documentation >that I would find useful when embarking on such a task? >Kind Regards >Mark > > >Mark, > >I found the 'JES3 White Paper' from E.Jaffe very useful to understand the >functionalities of both JES, and to see if such migration is worth. I did a >presentation some years ago at a customer site here in Germany who wanted to >migrate to JES2, too. Eventually, they didn't do it. Once you see all the >implications (time, money, operating education, automation update, etc), you >just leave your good, old JES3 where it is. Maybe Edward can tell you the link >where the paper is stored.
Having done this migration 18 years ago, I can say that the things that enabled the migration to be fairly good one were: 1. The shop was just a JES3 global. 2. We were implementing CA-7 for jobs scheduling anyway. 3. We were implementing CA-Dispatch for report management and this probably forced doing a good job of that implementation. 4. We were able to pick up mods from the CBT tape that I upgraded to JES2 1.3.4 and was able to set jobclass based on time, number of tapes and TCAM queues. These mods were resubmitted as a part of the Philips Lighting mods by Laurel Yates. 5. Simple WTO exits took care of tape drive contention. The reason for the switch were: 1. The rest of Philips was JES2 (Lighting was sold by Westinghouse which was a JES3 company). 2. JES2 was cheaper. 3. SNA NJE was free in JES2 and an added cost in JES3 (Bulk Data Transfer was required). 4. Although we didn't take advantage of it you could have SMS in XA under JES2 but not JES3. Yesterday, I read that a new NJE function will be available only in JES2. The JES3 folks have yet to learn that if they are going to justify their higher cost, they have to provide virtually all of the function JES2 does plus the unique JES3 function. I like a lot of the things in JES3 but I didn't notice that much degradation in function after the switch. > >Just my 2 Cents. > >Walter Marguccio >z/OS Systems Programmer >Germany > ---------------------------------------------------------------------- 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
