The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 1994
Filed:
Mar. 30, 1992
David A Elko, Poughkeepsie, NY (US);
Jeffrey A Frey, Fishkill, NY (US);
John F Isenberg, Jr, Poughkeepsie, NY (US);
Jeffery M Mick, Fishkill, NY (US);
Jimmy P Strickland, Saratoga, CA (US);
Michael D Swanson, Poughkeepsie, NY (US);
Audrey A Helffrich, Poughkeepsie, NY (US);
Brian B Moore, Poughkeepsie, NY (US);
International Business Machines Corp., Armonk, NY (US);
Abstract
A Structured External Storage (SES) device/processor is connected to two or more DP systems, thereby loosely coupling the systems. The SES is capable of holding data objects of two distinct types (List objects and Cache objects), and communicates commands and command responses with the systems using a message protocol. A support facility within a processor on which a system is executing receives status indications from the SES without interrupting mainline system execution. Within the SES, a serialization mechanism allows more than one command to execute in parallel without loss of data object integrity, or command consistency. A forward completion mechanism sends to systems early notification of completion of certain commands, without permitting results inconsistent with this notification to be obtained by the systems. And a restart mechanism permits interrupted commands to be restarted by the initiating system or, in certain cases, by another system.