公开(公告)号：GB2301910B

公开(公告)日：1999-07-21

申请号：GB9511512

申请日：1995-06-07

Applicant: IBM

Inventor： LUPTON PETER JAMES ,  BUXTON ROBERT FRANK ,  HUNTER IAN ,  PRICE HANDEL GLASNANT ,  RICHARDS ADAM ,  TILLING JOHN SIMON ,  ZIMMER DENNIS JACK ,  CZAYKOWSKI JERZY TADEUSZ

IPC: G06F11/14

Abstract: A method of moving records, stored on a recovery log, which are associated with units of work which have waited for a long time is described. Units of work which have waited for a long time, such as those which are in-doubt have their records copied from a recovery log to a secondary log. When the earliest-written record for this in-doubt unit of work has been copied, a new record called a fork record is written on to the recovery log which has two effects: to subtract the log records currently on the recovery log for this unit of work from the recovery log and to refer to the copied records written on the secondary log. The new record achieves this using two pointers, a pointer to point to the most-recently written record on the recovery log for this unit of work and a pointer to point to the most-recently written record on the secondary log for this unit of work.

公开(公告)号：GB2301910A

公开(公告)日：1996-12-18

申请号：GB9511512

申请日：1995-06-07

Applicant: IBM

Inventor： LUPTON PETER JAMES ,  BUXTON ROBERT FRANK ,  HUNTER IAN ,  PRICE HANDEL GLASNANT ,  RICHARDS ADAM ,  TILLING JOHN SIMON ,  ZIMMER DENNIS JACK ,  CZAYKOWSKI JERZY TADEUSZ

IPC: G06F11/14

Abstract: A method of moving records, stored on a recovery log, which are associated with units of work which have waited for a long time is described. Units of work which have waited for a long time, such as those which are "in-doubt", have their records copied from a recovery log 900 to a secondary log 950. When the earliest-written record 710 for this in-doubt unit of work has been copied, a new record 910 called a fork record is written on to the recovery log 900 which has two effects: effectively to subtract the log records 710,725,750 currently on the recovery log 900 for this unit of work from the recovery log 900 and to refer to the copied records 711,726,751 written on the secondary log 950. The new record 910 achieves this using two pointers, a pointer 970 to point to the most-recently written record 770 on the recovery log 900 for this unit of work and a pointer 960 to point to the most-recently written record 751 on the secondary log 950 for this unit of work.

公开(公告)号：DE2337713A1

公开(公告)日：1974-02-14

申请号：DE2337713

申请日：1973-07-25

Applicant: IBM

Inventor： CZAYKOWSKI JERZY TADEUSZ ,  PAGE DAVID RICHARD

IPC: G11C15/00 ,  G06F17/30 ,  G11C15/04 ,  G06F9/06