International Business Machines Corporation

Steven N Goss

David Arlen Elko

David Harold Surman

Michael J Jordan

Georgette L Kurdt

Jeffrey Mark Nick

Kelly B Pushong

Thomas C Shaw

Douglas W Westcott

Peter Dana Driever

Wendell W Wilkinson

Thomas Anthony Gregg

Dennis J Dahlen

Gottfried Andreas Goldrian

Audrey A Helffrich

Steven Bruce Jones

Neil G Bartow

John Charles Nagy

Dan F Greiner

Jeffrey Paul Kubala

Ronald Morton Smith, Sr

Peter Kenneth Szwed

Richard K Errickson

Carol B Hernandez

Gary M King

Ambrose A Verdibello, Jr

Mark A Brooks

Andrew W Piechowski

Michael L Greenblatt

Joseph A Williams

Chitta L Rao

A vector entry of a signaling vector is registered to a buffer summary group. The buffer summary group includes one or more summary indicators for one or more buffers assigned to the buffer summary group. A command is processed that sets a vector indicator in the vector entry and based on setting the vector indicator in the vector entry, a summary indicator of the one or more summary indicators is set in the buffer summary group.

Vector processing employing buffer summary groups

A coupling facility is coupled to one or more other coupling facilities via one or more peer links. The coupling of the facilities enables various functions to be supported, including the duplexing of structures of the coupling facilities. Duplexing is performed on a structure basis, and thus, a coupling facility may include duplexed structures, as well as non-duplexed or simplexed structures.

Controlling the state of duplexing of coupling facility structures

A computing system is configured to maintain equivalency of independent queues located in different coupling facilities. The computer system includes a first coupling facility and a second coupling facility. The first coupling facility receives a plurality of different commands instructing the first coupling facility to load data into a first structure. The first coupling facility generates a first command data block including first data corresponding to a received first command and a first sequence value indicating a sequence at which the first data was loaded into the first structure with respect to remaining data corresponding to the plurality of commands. A second coupling facility includes a second structure and a second queue. The second coupling facility receives the first command data block from a first queue of the first coupling facility and loads the first data from the second queue into the second structure based on the first sequence value.

Computing system including independent coupling facilities maintaining equivalency based on sequence values

A computing system is configured to maintain equivalency of independent structures located in different coupling facilities. The computing system includes a first coupling facility and a second coupling facility different from the first coupling facility. The first coupling facility includes a first structure that receives a first data modification based on a modification command requested by an application executed by an operating system. The second coupling facility in signal communication with the first coupling facility and includes a secondary structure that receives a second data modification based on the first data modification applied to the first structure. The first coupling facility outputs a Push List Structure Object (PLSO) command data block to the second coupling facility. The PLSO command data block indicates the first data modification applied to the first structure.

Computing system including PLSO command to maintain equivalency between independent coupling facilities

A facility is provided to enable operator message commands from multiple, distinct sources to be provided to a coupling facility of a computing environment for processing. These commands are used, for instance, to perform actions on the coupling facility, and may be received from consoles coupled to the coupling facility, as well as logical partitions or other systems coupled thereto. Responsive to performing the commands, responses are returned to the initiators of the commands.

Operator message commands for testing a coupling facility

Processing operator message commands

Executing a start operator message command

Transmitting operator message commands to a coupling facility

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Steven N Goss