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Patent Agency Ranking
公开(公告)号：DE68926693D1
公开(公告)日：1996-07-25
申请号：DE68926693
申请日：1989-02-24
Applicant: IBM
Inventor： ELLIOTT LINDA CAROLYN , HORN GARY RANDALL , JODAN LLOYD EUGENE , LEVINE FRANK ELIOT , SHIH GENG-FONG , MYRE WILLIAM WALTER
Abstract: System and method for reducing data loss in a database system during I/O errors and power failure during non-atomic writes to media in a transaction management system using write-ahead logging protocol. A recovery log is written during forward processing. On system restart processing, the log is traversed and a REDO executed. Recovery is effected from detected incomplete log writes or log write failures and uncommitted transactions are undone. A technique is provided in which files having I/O errors are identified, whereby subsequent restart operations are prevented from accessing these files. In one embodiment index files with such error are renamed, serving to indicate that corresponding original files contain errors, and the error index files are automatically rebuilt whereby I/O error on the files causes no data loss. The index file rebuild does not invalidate access plans related to the failed index.
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公开(公告)号：DE68926693T2
公开(公告)日：1997-01-23
申请号：DE68926693
申请日：1989-02-24
Applicant: IBM
Inventor： ELLIOTT LINDA CAROLYN , HORN GARY RANDALL , JODAN LLOYD EUGENE , LEVINE FRANK ELIOT , SHIH GENG-FONG , MYRE WILLIAM WALTER
Abstract: System and method for reducing data loss in a database system during I/O errors and power failure during non-atomic writes to media in a transaction management system using write-ahead logging protocol. A recovery log is written during forward processing. On system restart processing, the log is traversed and a REDO executed. Recovery is effected from detected incomplete log writes or log write failures and uncommitted transactions are undone. A technique is provided in which files having I/O errors are identified, whereby subsequent restart operations are prevented from accessing these files. In one embodiment index files with such error are renamed, serving to indicate that corresponding original files contain errors, and the error index files are automatically rebuilt whereby I/O error on the files causes no data loss. The index file rebuild does not invalidate access plans related to the failed index.
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公开(公告)号：DE69025494T2
公开(公告)日：1996-09-19
申请号：DE69025494
申请日：1990-05-15
Applicant: IBM
Inventor： ELLIOTT LINDA CAROLYN , JORDAN LLOYD EUGENE II , NUDD HOWARD CLARK
Abstract: A local application (10) connected to a remote application (18) over a computer network (16,30) can interrupt processing of the remote application. To do so, a new communications link is opened (30), and an identifier of the remote process to be interrupted is passed to the remote node. The new communications link is then closed. A manager process (34) on the remote node raises the interrupt to the desired remote application, which returns acknowledgement of the interrupt over the original connection.
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公开(公告)号：DE69025494D1
公开(公告)日：1996-04-04
申请号：DE69025494
申请日：1990-05-15
Applicant: IBM
Inventor： ELLIOTT LINDA CAROLYN , JORDAN LLOYD EUGENE II , NUDD HOWARD CLARK
Abstract: A local application (10) connected to a remote application (18) over a computer network (16,30) can interrupt processing of the remote application. To do so, a new communications link is opened (30), and an identifier of the remote process to be interrupted is passed to the remote node. The new communications link is then closed. A manager process (34) on the remote node raises the interrupt to the desired remote application, which returns acknowledgement of the interrupt over the original connection.
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公开(公告)号：BR8901640A
公开(公告)日：1989-11-21
申请号：BR8901640
申请日：1989-04-07
Applicant: IBM
Inventor： CAMP LAURA SUSAN , ELLIOTT LINDA CAROLYN , LEHMAN TOBIN JON , LINDSAY BRUCE GILBERT
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