What are the “basic architecture” features of MVS/ESA?
MVS/ESA stands for Multiple Virtual Storage / Enterprises System Architecture. MVS/ESA permits an application to have multiple 2-gigabyte address spaces. This allows huge applications to be segregated into functional parts. For ESA, the first address space is called the application space and programs can execute in it. The other address space are called dataspaces and they contain only data. MVS/ESA also has the facility for hyperspaces, which allows temporary data to be stored or retrieved in 4-kbyte blocks under program control. Maximum address space is up to 2 trillion bytes in multiple of 2-billion-byte address spaces.
