June 2003
Intermediate to advanced
464 pages
10h 33m
English
On the mainframe, there are three options for running Linux:
Natively on the mainframe hardware
In a logical partition (LPAR)
As a guest operating system under z/VM
Of these, the most interesting for the server consolidation case is the z/VM option.
Using LPARs, you can define up to 15 partitions (with the S/390 and zSeries machines), each of which hosts a separate server. If an LPAR contains CPUs that can run any operating system (so called general purpose engines), any mainframe operating system can run in that partition. The hardware resources of the mainframe (CPU, I/O, and memory) are divided according to the definition of each LPAR. zSeries and S/390 hardware have the computing power coupled with adequate ...