page 34. V=R guests with non-dedicated I/O (eg. sharing DASD) will show lower
ratios than the native case shown in the charts.V=V guest migration typically
yields a lower capacity ratio since the Mode=VMESA guest performance is not as
good as the 370 environments Mode=VM guest performance.
The data shown in this section is based on measurements and projections for a
IBM S/390 Integrated Server with 256MB of S/390 storage, 128MB of I/O and
Service Processor (IOSP) storage, one SSA RAID5 array containing the workload
components, and 1 SSA loop.A 2MB HPFS read cache was(LAZY=OFF) was
also specified.A customer's actual performance will vary depending on many
factors, such as I/O content, system configuration, available storage, and the
specific workload being processed.
36 S/390  Integrated Server