According to the z/VM and Linux SLES SP2 Cookbook, a ratio of 3:1 of central to expanded storage is recommended, further justified at http://www.vm.ibm.com/perf/tips/storconf.html. Improvements documented with z/VM 5.2 suggest that a maximum of 2G expanded is recommended, or 25 % of all configured storage. In my z/VM 5.4 and SLES SP2 implementation, I have been informed that expanded storage is no longer required for z/VM with Linux guests. I tend to believe the latest change in 5.2; a 4:1 ratio up to a max of 2G expanded. Any suggestions?
*Ross Johnson *Sr. Systems Programmer National Defence Ottawa, Canada internal email: [email protected] external email: [email protected] Government of Canada
