INTRO TO IBM Z SYSTEMS Flashcards
Computer Architecture Def?
Set of rules and methods that describe the functionality, organization, and implementation of the computer system.
What does software design include?
Compiler, Firmware, Operating System, Applications
Two categories of Software design?
Application Software and System Software
Attributes of Firmware
Read only memory, comes from factory associated with hardware, does not change unless problem or update, Provides common set of methods for operating system
Compiler Function
Takes source code and compiles into something the machine can run (one-direction)
What is ISA and what does it do?
Instruction Set Architecture, Bridges gap between software and hardware, Contains and lists every function processor is capable of.
What does hardware design include?
Physical, Circuit, Digital, Data Path Control, Instruction set procedures and I/O system.
What does the processor interact with to communicate with the software?
The ISA (Instruction Set Architecture)
What is the Flow of an Application from software to hardware?
Compiler –> Application –> Operating System –> ISA –> Hardware (Processor)
Where is AUX storage kept?
DASD (Direct Access Storage Device)
What is memory on the mainframe referred to as? What does it include?
Storage. On chip and AUX memory.
Address Space Definition
A map of storage that is made available to users and applications
What are pages?
Memory placed in four kilobyte chunks
What do pages occupy when in central storage?
A frame
What do pages occupy when in AUX storage?
A slot
What is the term when OS moves slot to frame or vice versa?
Paging
What is a Logical Partition?
An LPAR is a subset of the processor hardware that is defined to support an operating system and operates as an independent system.
What Resources can be found in an LPAR?
Central Processor (CP), System Assist Processor (SAP), Integrated Facility Linux (IFL), IBM Z Systems Integrated Information Processor for Linux (zIIP)
CP Function?
Central Processor, Runs the operating system and applications
SAP Function?
System Assist Processor Helps link CP to I/O, Handles paging and data transfer to allow CP to focus on business applications.
IFL Function?
Processor built for Linux on mainframe
zIIP Function?
IBM z Systems Integrated Information Processor for Linux, Main function to offload work.
What are I/O adapters?
Channel Path Identifiers (CHPIDS)
What are CHPIDS associated with?
PCHID (Physical Channel ID), Logical subsystem
What is a PCHID?
Physical Channel ID, a physical port location
What is a logical subsystem?
The connection between the LPAR and I/O devices or other LPARs
CHPID Attribute?
Can be dedicated to one LPAR in an unshared logical connection or Shared by multiple LPARS in a configured span
What is a z/VM?
Virtual Machine, System that specializes in virtualization
What type is a z/ VM?
A type 1 hypervisor, meaning it does not need to sit on top of another operating system
