Migration from VM/ESA 2.4.0 and TCP/IP FL 320
This chapter examines the performance effects of migrating from VM/ESA 2.4.0 to z/VM 3.1.0 and from TCP/IP Function Level 320 to TCP/IP Level 3A0. The following environments were measured: CMS-intensive, VSE guest, Telnet, and FTP.
z/VM 3.1.0 provides both a 31-bit and a 64-bit version of CP. The 31 bit version can run on older processors and 64-bit capable processors in 31 bit mode. The 64-bit version can only run on 64-bit capable processors. Because of this, all VM performance regression measurements were set up as a 3-way comparison of VM/ESA 2.4.0, z/VM 3.1.0 with 31-bit CP, and z/VM 3.1.0 with 64-bit CP, all run on an IBM zSeries 900 processor.