ABCs of z/OS System Programming: Volume 5
Base and Parallel Sysplex®, System Logger, Resource Recovery Services (RRS), global resource serialization (GRS), z/OS system operations, Automatic Restart Management (ARM), Geographically Dispersed Parallel Sysplex™ (GPDS), availability in the zSeries® environment
IBM Redbook link: ABCs of z/OS System Programming: Volume 5