公开(公告)号：CA2119221A1

公开(公告)日：1994-09-17

申请号：CA2119221

申请日：1994-03-16

Applicant: IBM

Inventor： GILLES ROBERT A ,  GRAFE ROBERT J ,  JACKSON ROBERT D ,  REINSCH ROGER A ,  SANDERS RICHARD R ,  SLONIM JACOB ,  ZIMOWSKI MELVIN R

IPC: G06F9/46 ,  G06F15/403 ,  G06F13/42

公开(公告)号：CA2034906C

公开(公告)日：1995-03-14

申请号：CA2034906

申请日：1991-01-24

Applicant: IBM

Inventor： DEMERS RICHARD A ,  LINDSAY BRUCE G ,  REINSCH ROGER A ,  ZIMOWSKI MELVIN R

IPC: G06F12/00 ,  G06F17/30 ,  H03M5/00

Abstract: The invention establishes the context in which data exchanged between dissimilar relational database management systems can be mutually understood and preserved. The invention accomplishes this by establishing layers of descriptive information which isolate machine characteristics, levels of support software, and user data descriptions. Optimized processing is achieved by processing the different descriptor levels at different times during the development and execution of the database management systems. Minimal descriptive information is exchanged between the cooperating database management systems. For systems which match, data conversion is completely avoided. For systems which do not match, data conversion is minimized.

公开(公告)号：CA1273434A

公开(公告)日：1990-08-28

申请号：CA528995

申请日：1987-02-04

Applicant: IBM

Inventor： REINSCH ROGER A ,  ZIMOWSKI MELVIN R

IPC: G06F12/00 ,  G06F11/14

Abstract: METHOD FOR RESTARTING A LONG-RUNNING, FAULT-TOLERANT OPERATION IN A TRANSACTION-ORIENTED DATA BASE SYSTEM WITHOUT BURDENING THE SYSTEM LOG A restartable load without logging method permits the restart of a LOAD operation from the last COMMIT point without requiring the writing of images of loaded records to the log. Instead, the method logs only a minimal amount of information, recording positions within the data sets to be loaded and within the tablespace being loaded. SA9-85-042