Hi, The z10 supports up to z/OS 2.2 so you can be relatively current, but you ahve to order it pretty soon, or there will be an extra charge from IBM to do so, and if you decide to save money by moving to a z/13 or z/14 down the road (the software cost is cheaper), then you will be staged perfectly upgrades. You are probably already using z/VM to get beyond some of the problems with OS/390 and the z10, and you will need to make sure that the LPARs are running the correct archlevels.
Catalog sharing is no problem at all, so long as you aren't going to attempt to migrate an active sysplex (which I doubt) you won't have to worry about anything relating to catalogs or datasets. If you have ISAM datasets, you might want to convert them first because while z/OS 1.13 "supports" them, they really don't work well there. You won't be able to use the new catalog sharing buffers when you are sharing the catalogs, but the difference in access times is trivial anyway. Sharing unsupported datasets on the systems is also something to be aware of, Linear VSAM datasets and PDS/e's will need to be protected from the OS/390 system, and I wouldn't try to make OS/390 use any new really large DASD, but it gives you something to look forward to later:). There should be no sharing of the JES2 spool, but you can NJE between the LPARs (JES to JES) with no problems. Even the TCP/IP update and the fact that your new system can manage OSA directly (do you have any on the z10, if not, buy some and get rid of your old control units, you will be happy you did). When you get to the actual OS/390 to z/OS conversion the operating system part is quite simple and as others have already stated, you are going to need to nail down the Exits and home grown code before you start. Exits are basically very simple to re-write, and I have found that it's best to just figure out what they were trying to do and put it in the right place. You would be surprised at the things some sites will do in a SMF exit that was better off under Jes, or vice-versa, and many "things' won't even need to be redone because they are able to be controlled via parms instead of exits. There are also probably several/many usermods to the system (and/or subsystems). Many things won't need to be converted (exit and mods wise), but there is always some that you will want to keep. No one wants to end up with something very important "missing" when you try to run production. There will be a great number of subsystems and vendor products that will need to be converted at the same time. That's where the bulk of your effort will come in because z/OS was the "easy" part. If they are using CICS, that's one more conversion you have to juggle, DB/2, that's another, IMS, HSM, etc. Then you have the vendor code, every vendor (CA, COMPUWARE, BMC, etc.) will not only want to double (or more) your costs, but they will have a series of conversions that you will have to go through. For instance, if you are running CA-View, you will need to convert the database it uses two different times. None of it is hard, but you have to know this all going into the project, or you will be eaten alive by the "one-more-thing" syndrome that vendors love to drag you through. Once you have more information on where you are currently (subsystems and vendor software), I can be more specific. Everything though will depend on the software a the platform you are "actually" running on now, and what IBM subsystems and vendor products that they are currently using. Even the COBOL conversion can be a issue if you let it get away from you. You can run the older (1974) COBOL on z/OS 2.3, you just have to set it up correctly, and it won't play well with LE/COBOL V6, whereas it can inter-operate with LE/COBOL 4.2 with almost no problems at all. Any way, you can contact me off-list if you want or I'll wait for your on-list responses. My "checklist" for converting to z/OS from OS/390 is well over 38,000 items and their "solutions", but that covers all IBM and Vendor products and all versions of z/OS back to MVS/XA 2. I moved it to an iPad (and two backup iPads) several years ago so that I didn't have to page through multiple documents any more. Brian Westerman ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
