Method, system and program products for providing user-managed duplexing of coupling facility cache structures

Coupling facility store-in cache structures are duplexed in order to improve data availability. That is, once duplexing is established, selective data is written to both a primary structure instance and a secondary structure instance. Thus, if one of the structure instances fails, then the other str...

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Main Authors SURMAN DAVID HAROLD, ELKO DAVID ARLEN, NARANG INDERPAL SINGH, TENG JAMES ZUIA, PUSHONG KELLY B, JOSTEN JEFFREY W, NICK JEFFREY M, JONES STEVEN BRUCE
Format Patent
LanguageEnglish
Published 25.03.2003
Edition7
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:Coupling facility store-in cache structures are duplexed in order to improve data availability. That is, once duplexing is established, selective data is written to both a primary structure instance and a secondary structure instance. Thus, if one of the structure instances fails, then the other structure instance is used in order to prevent data from being lost. Duplexing can be started manually and/or automatically by the operating system. Further, a structure may be removed from duplex mode and enter simplex mode, if duplexing is not desired.
Bibliography:Application Number: US19990255382