Inventor

ELKO DAVID A

US68 patents

⚠️ This page may combine multiple inventors who share the name “ELKO DAVID A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ELKO DAVID A

IBM

Sysplex shared data coherency method

Multiple processor system having software for selecting shared cache entries of an associated castout class for transfer to a DASD with one I/O operation

Halting execution of duplexed commands

In a multiprocessing system having a coupling facility, communicating messages between the processors and the coupling facility in either a synchronous operation or an asynchronous operation

Integrity of data objects used to maintain state information for shared data at a local complex

Method and apparatus for coupling data processing systems

Method and apparatus for expansion, contraction, and reapportionment of structured external storage structures

Multi channel inter-processor coupling facility processing received commands stored in memory absent status error of channels

Coupling facility for receiving commands from plurality of hosts for activating selected connection paths to I/O devices and maintaining status thereof

Software cache management of a shared electronic store in a supplex

Method and apparatus for distributed locking of shared data, employing a central coupling facility

Non-blocking serialization for caching data in a shared cache

Authorization method for conditional command execution

Command execution system for using first and second commands to reserve and store second command related status information in memory portion respectively

Command quiesce function

Method and apparatus for implementing a shared message queue using a list structure

Method, system and program products for resolving potential deadlocks

System and method for calibrating a time of day clock in a computing system node provided in a multi-node network

Method, system and program products for modifying coupling facility structures

Directed allocation of coupling facility structures

Method and apparatus for previewing the results of a data structure allocation

Controlling the state of duplexing of coupling facility structures

Controlling the state of duplexing of coupling facility structures

Managing the state of coupling facility structures, detecting by one or more systems coupled to the coupling facility, the suspended state of the duplexed command, detecting being independent of message exchange

System-managed duplexing of coupling facility structures

Restarting a coupling facility command using a token from another coupling facility command

Method, system and program products for copying coupling facility structures

Method, system and program products for copying coupling facility cache structures

Method, system and program products for browsing fully-associative collections of items

Interdicting I/O and messaging operations from sending central processing complex to other central processing complexes and to I/O device in multi-system complex

Method and apparatus for processing a list structure

System-managed rebuild of coupling facility structures

Controlling the state of duplexing of coupling facility structures

Controlling the state of duplexing of coupling facility structures

Facilitating synchronization of servers in a coordinated timing network

Providing at least one peer connection between a plurality of coupling facilities to couple the plurality of coupling facilities

Method, system and program products for copying coupling facility lock structures

Managing errors detected in processing of commands

Method and system for time synchronization among systems using parallel sysplex links

Controlling the state of duplexing of coupling facility structures

Definition of an active stratum-1 server in a coordinated timing network

Method and system for providing a message-time-ordering facility

Operator message commands for testing a coupling facility

Facilitating recovery in a coordinated timing network

Method, system and program products for copying coupling facility list structures

Coordinated timing network configuration parameter update procedure

ELKO DAVID A

Controlling the state of duplexing of coupling facility structures

Executing a start operator message command

Transmitting operator message commands to a coupling facility

CARLSON SCOTT M

Method and system for time synchronization among systems using parallel sysplex links