Anton, A few points, on this message, and others by you in this thread. 1 - Yes, as recently as 3 years ago, current z/OS releases had a "switch" to designate 31 bit or 64 bit. This switch was in the OS, not in application code. In addition, this switch allowed a customer to perform 1 install of the operating system, IPL it on a box with 64 bit hardware, but run it in 31 bit mode. I know of no other operating system that provides this capability. In addition, the same install of those operating system levels could run on a 31 bit machine. I could then change the switch and IPL the same operating system on 64 bit hardware and it will run in 64 bit mode. If I have a UNIX or Windows machine and I install the current operating system on it, I have to choose, do I want a 64 bit kernal or a 32 bit kernel. If I first install the 31 bit OS and I get a 64 bit machine, I have to reinstall the operating system with a 64 bit kernel. 2 - In regards to the DB2 history, you are correct that DB2 was based on IMS, recall that the 2 in DB2 is Database 2 where IMS was Database 1. However, the only part of DB2 that uses IMS like access is in the original catalog tables, and the directory, for all user objects, the access is strictly relational, there is no Hierarchical data access avaialable. In the early 80's when DB2 was being designed the concept of Code Reuse was pretty much unheard of, so IBM was ahead of the curve.
Wayne Driscoll Product Developer JME Software LLC NOTE: All opinions are strictly my own. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Anton Britz Sent: Thursday, June 01, 2006 5:03 PM To: [email protected] Subject: Re: Fw: Fw: IMS at the Crossroads? Wayne, Not sure what you are smoking but the last time I looked, z/OS had a switch in parmlib that says "31 bit mode or 64 bit mode. You can run z/Os in any of the two modes and it works but some how DB2 V8 on the z/OS platform did not have that capability. Not talking about My/Sql on your Intel/Apple/Unix platform. History: Meaning some thing that already happened: DB2 V8 was not successfully "sold" to the existing customers. End of story... no ANTI-BIAS, it's a fact as stated by IBM'er's !! Anton On 6/1/06, Wayne Driscoll <[EMAIL PROTECTED]> wrote: > > Anton, > You clearly have an anti-IBM bias. Yes, DB2 V8 requires 64 bit hardware. > ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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
