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6 records (took 0.017 seconds)

    1.
    发明专利
    未知

    公开(公告)号：DE3685870D1

    公开(公告)日：1992-08-06

    申请号：DE3685870

    申请日：1986-08-29

    Applicant: IBM

    Inventor： FUKUMOTO TAKESHI ,  FUNAHASHI TAKAYUKI ,  SCHWEIKERT GERHARD ,  SCOFIELD HARRISON ,  WALKER TERRENCE ELDON ,  YOUNG JR

    IPC: G06F12/00 ,  G06F11/14 ,  G06F11/20

    Abstract: A method for maintaining switchover between a backup and degrading active processor, which switchover is transparent to a terminal accessing the active processor with atomic transactions. The backup processor prepares for an outage by the active processor by synchronizing, tracking, and monitoring the active processor's log entries. When the active processor fails, the backup processor performs the necessary recovery processing and takes over user-transaction processing as the new active processor.

    2.
    发明专利
    未知

    公开(公告)号：DE3779770D1

    公开(公告)日：1992-07-23

    申请号：DE3779770

    申请日：1987-01-23

    Applicant: IBM

    Inventor： BEIER HARLEY AL ,  FUKUMOTO TAKESHI ,  SCOFIELD HARRISON ,  WATTS VERN LEE

    IPC: G06F15/16 ,  G06F11/14 ,  G06F11/20 ,  G06F12/00 ,  G06F12/16

    Abstract: A method is disclosed for maintaining availability of a restartable data base system where continuity of service is guaranteed by having a loosely-coupled backup processor taking over processing of a degraded active processor. The backup processor continuously tracks the activities of the active processor to ascertain data set elements updatable by the active processor. Upon switchover, images of data set elements updatable by the degraded active processor are created in the buffer of the backup processor. By making references and updates to the images, processing of the backup processor can start immediately after switchover. Upon preventing the degraded active processor from making further updates, the backup processor writes the images back to the data base.

    3.
    发明专利
    未知

    公开(公告)号：DE3685870T2

    公开(公告)日：1993-02-04

    申请号：DE3685870

    申请日：1986-08-29

    Applicant: IBM

    Inventor： FUKUMOTO TAKESHI ,  FUNAHASHI TAKAYUKI ,  SCHWEIKERT GERHARD ,  SCOFIELD HARRISON ,  WALKER TERRENCE ELDON ,  YOUNG JR

    IPC: G06F12/00 ,  G06F11/14 ,  G06F11/20

    Abstract: A method for maintaining switchover between a backup and degrading active processor, which switchover is transparent to a terminal accessing the active processor with atomic transactions. The backup processor prepares for an outage by the active processor by synchronizing, tracking, and monitoring the active processor's log entries. When the active processor fails, the backup processor performs the necessary recovery processing and takes over user-transaction processing as the new active processor.

    4.
    发明专利
    未知

    公开(公告)号：DE3779770T2

    公开(公告)日：1993-02-04

    申请号：DE3779770

    申请日：1987-01-23

    Applicant: IBM

    Inventor： BEIER HARLEY AL ,  FUKUMOTO TAKESHI ,  SCOFIELD HARRISON ,  WATTS VERN LEE

    IPC: G06F15/16 ,  G06F11/14 ,  G06F11/20 ,  G06F12/00 ,  G06F12/16

    Abstract: A method is disclosed for maintaining availability of a restartable data base system where continuity of service is guaranteed by having a loosely-coupled backup processor taking over processing of a degraded active processor. The backup processor continuously tracks the activities of the active processor to ascertain data set elements updatable by the active processor. Upon switchover, images of data set elements updatable by the degraded active processor are created in the buffer of the backup processor. By making references and updates to the images, processing of the backup processor can start immediately after switchover. Upon preventing the degraded active processor from making further updates, the backup processor writes the images back to the data base.

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