Acronyms used

The following acronyms are used in the OMEGAMON for z/OS help.

CBU Capacity Backup. Enables alternative System z processors to take over workload from another server in case of an emergency or unusual high demand.

CF Coupling facility. On z/OS, a special logical partition that provides high-speed caching, list processing, and locking functions in a Sysplex.

CFRM Coupling Facility Resource Manager. A component of z/OS that provides the services to manage coupling facility resources in a Sysplex. This management includes the enforcement of CFRM policies to ensure that the coupling facility and structure requirements are satisfied.

CP Central processor. The part of the computer that contains the sequencing and processing facilities for instruction execution, initial program load, and other machine operations.

CPC Central processor complex. In a z/OS or OS/390 environment, a physical collection of hardware (such as an ES/3090) that consists of main storage, one or more central processors, timers, and channels.

CPM Capacity provisioning management. The ability to dynamically provision physical processors to, and deprovision them from, a System z10 complex based on an installation policy, with or without operator intervention.

CPU Central processing unit. The part of a computer that includes the circuits that control the interpretation and running of instructions.

CSA Common storage area. Also, common service area, used interchangeably. A shared region of memory.

CSECT Control section.

ECB Event control block. A control block used to represent the status of an event.

ECKD Extended Count Key Data. An extension of the count-key-data (CKD) architecture. Count-key data is a data-record format employing self-defining record formats in which each record is represented by up to three fields: a count field identifying the record and specifying its format, an optional key field that can be used to identify the data area contents, and an optional data field that typically contains the user data.

ECSA Extended common storage area. A major element of z/OS virtual storage above the 16MB line. This area contains pageable system data areas that are addressable by all active virtual storage address spaces. It duplicates the common storage area (CSA) which exists below the 16MB line.

ELSQA Extended local system queue area.

ESCON Enterprise Systems Connection. A peripheral interface for an Enterprise Systems Architecture/390 and zSeries computer. The I/O interface uses ESA/390 logical protocols over a serial interface that configures attached units to a communication fabric.

ESQA Extended system queue area. A major element of z/OSvirtual storage above the 16MB line. This storage area contains tables and queues relating to the entire system. It duplicates above the 16MB line the system queue area (SQA) .

GRS ring Global resource serialization ring. Consists of one or more systems connected to each other by communication links. The links are used to pass information about requests for global resources from one system to another in the complex. Requests are made by passing a message or token, called the ring system authority (RSA) message, between systems in a round-robin or ring fashion.

HSA Hardware system area. A logical area of central storage, not addressable by application programs, used to store Licensed Internal Code and control information.

HSM Hierarchical storage management. A function that automatically distributes and manages data on disk, tape, or both by regarding devices of these types and potentially others as levels in a storage hierarchy that range from fast, expensive devices to slower, cheaper, and possibly removable devices. The objectives are to minimize access time to data and maximize available media capacity.

ICF Integrated Coupling Facility. A processor used by multiple systems to coordinate work. ICFs must be assigned to LPARs that then become coupling facilities.

ICSF Integrated Cryptographic Service Facility. Provides the administrative interface and a large set of application interfaces to the cryptographic coprocessor hardware.

IFA Integrated Facility for Applications. A special type of processor.

IRD Intelligent Resource Director. A key feature of the zSeries architecture, which automatically directs resources to priority workloads. IRD gives users the capability of managing resource and workload across z/OS LPARs that are members of a common group called an LPAR cluster. The Intelligent Resource Director is made up of three parts: LPAR CPU Management, Dynamic Channel Path Management (DCM), and Channel Subsystem Priority Queuing (CSSPQ).

JES Job Entry Subsystem. An IBM licensed program that receives jobs into the system and processes all output data that is produced by jobs.

LSQA Local System Queue Area. One or more segments associated with each virtual storage region that contain job-related system control blocks.

MSU Millions of service units. A measure of the amount of processing a computer can perform in one hour.

OOCoD On/Off Capacity On Demand. The ability of z990 and later servers to temporarily activate and deactivate processors and memory units to handle fluctuating workloads.

RMF Resource Measurement Facility. An IBM licensed program or optional element of z/OS that measures selected areas of system activity and presents the data collected in the format of printed reports, System Management Facility (SMF) records, or display reports. RMF is used to evaluate system performance and identify reasons for performance problems.

PCIe or PCI-E Peripheral Component Interconnect Express. PCIe or PCI-E is a serial expansion bus standard for connecting a computer to one or more peripheral devices.

RSA Ring system authority. Requests between systems in a GRS ring system are sent in a round-robin or ring fashion by passing a message or token, called the ring system authority (RSA) message.

SCM Storage Class Memory. Adding storage class memory (SCM) on Flash Express cards to your auxiliary storage can increase paging performance and flexibility.

SQA System queue area. An area of virtual storage below the 16MB line reserved for system-related control blocks.

SRB Service request block. A unit of work that is scheduled to execute in another address space.

SRM System resources manager. A group of programs that controls the use of system resources, such as programs, devices, and storage areas that are assigned for use in jobs.

TCB Task control block. A z/OS control block used to communicate information about tasks, within an address space, that are connected to a z/OS subsystem.

VIO Virtual input/output. Temporary data sets can be handled by a facility called virtual input/output (VIO). VIO data sets reside in the paging space but appear to the access method to reside on a direct access storage device.

VTOC Volume table of contents. A table on a direct access volume that describes the location, size and other characteristics of each data set on the volume. Each entry is a data set control block (DSCB).

WLM Workload Manager. A z/OS component that prioritizes workloads running on z/OS and matches workloads with available resources.

XCF Cross-system coupling facility. A special logical partition that provides high-speed caching, list processing, and locking functions in a Sysplex. XCF provides the z/OS coupling services that allow authorized programs on z/OS systems in a multisystem environment to communicate with (send data to and receive data from) authorized programs on other z/OS systems.

zAAP zSeries Application Assist Processor. A special class of assist processor designed to run Java workloads. For reporting purposes, a zAAP is usually referred to as an integrated facility for applications (IFA).

zIIP zSeries Integrated Information Processor. A special class of assist processor used mostly for DB2 workloads.