It has been my experience that catalogs have been one on the major areas of compatibility issues. These have all been new fields or structures that are not a problem if you do not use them during the conversion period. IIRC these have been reporting issues but not a show stopper unless you try to use them on the down level system.
Brian already mentioned IODF issues. Use the lower level if at all possible. The other big one has been SMS and WLM CDS formats. Use the lower level or separate CDS for each release. The JES teams have done a lot of work to not have compatibility issues. I cannot recall the last forced cold start on JES3. I think JES2 is a different issue if the jump is too long. As Brian said - plan, plan, plan Dennis Roach GHG Corporation Lockheed Martin Mission Services Flight Design and Operations Contract NASA/JSC Address: 2100 Space Park Drive LM-15-4BH Houston, Texas 77058 Mail: P.O. Box 58487 Mail Code H4C Houston, Texas 77258 Phone: Voice: (281)336-5027 Cell: (713)591-1059 Fax: (281)336-5410 E-Mail: [email protected] All opinions expressed by me are mine and may not agree with my employer or any person, company, or thing, living or dead, on or near this or any other planet, moon, asteroid, or other spatial object, natural or manufactured, since the beginning of time. > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of Brian Westerman > Sent: Wednesday, March 25, 2009 12:53 AM > To: [email protected] > Subject: Re: z/OS 1.7 upgrade to 1.10 > > There is NOTHING,NOTHING,NOTHING against migrating to the current version of > z/OS directly from ANY version of z/OS, or even going back at least to > OS/390 2.7. Not only that, but with proper planning you can fall back as > well. All it takes is planning. ---------------------------------------------------------------------- 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
