z/VM has been 64-bit capable since z/VM 3.1, with the ability to choose whether to use 31-bit or 64-bit if the hardware allowed. With z/VM 5.1 it became 64-bit ONLY.
"Christmas is a funny season. What other time of the year do you sit in front of a dead tree and eat candy out of your socks?" Gordon Wolfe, Ph.D. (425)865-5940 VM Technical Services, The Boeing Company > ---------- > From: Schuh, Richard > Reply To: VM/ESA and z/VM Discussions > Sent: Thursday, December 15, 2005 8:51 AM > To: [email protected] > Subject: Re: How Do I Make Use of the Extra 4G Memory? > > If z/VM only supports up to 2G of central storage, then I have a problem. Our > system has been running with 30GB main and 26GB expanded for 6 months. The > confusion is that prior to z/VM 5.2, the VM CP is a 32-bit system, which does > not imply that it only supports a maximum main storage size of 2GB. The CP > runs below 2GB, but it does use storage above the line - guest storage would > be a good example of an above the line usage. We have been running z/VM with > greater than 2GB main storage since we were first able to have more than 2GB > for our TPF guests. > > -----Original Message----- > From: VM/ESA and z/VM Discussions [mailto:[EMAIL PROTECTED] On > Behalf Of Rich Greenberg > Sent: Wednesday, December 14, 2005 12:56 PM > To: [email protected] > Subject: Re: How Do I Make Use of the Extra 4G Memory? > > On: Wed, Dec 14, 2005 at 12:30:36PM -0800,anson Wrote: > > } We recently upgraded our CPU from an MP3000 to an 8G z/890 machine. The > } configuration is 2 LPARS running z/VM 5.1 on both sides. One side runs > } multiple VSEs, and the other runs multiple Linux S/390. Now the > } question is, since z/VM only supports up to 2G central storage, > } what/how can I make use of the extra 4G memory? > } Anson Ngai > } VM/VSE Systems Programmer. > > 2 possibilities: > > 1) Give each lpar 2g of expanded memory > 2) Go to the 64 bit version of VM. > > -- > Rich Greenberg N6LRT Marietta, GA, USA richgr atsign panix.com + 1 770 321 > 6507 > Eastern time zone. I speak for myself & my dogs only. VM'er since CP-67 > Canines:Val, Red & Shasta (RIP),Red, husky Owner:Chinook-L > Atlanta Siberian Husky Rescue. www.panix.com/~richgr/ Asst Owner:Sibernet-L > >
