公开(公告)号：JPH09204340A

公开(公告)日：1997-08-05

申请号：JP877596

申请日：1996-01-23

Applicant: TANDEM COMPUTERS INC

Inventor： MAIKERU JIEI SUKAAPEROSU ,  ROBAATO FUAN DERU RINDEN ,  UIRIAMU JIEI KAAREI ,  JIEEMUZU EI RAIAN ,  MASHIYUU SHII MATSUKURIIN

IPC: G06F11/34 ,  G06F12/00

Abstract: PROBLEM TO BE SOLVED: To utilize a stored audit trace file for restoring on-line by enabling an audit trail constitution control processor to control the generation, renaming and erasing of the audit trace file on an audit trace disk storage device. SOLUTION: Both of a data disk processor 200 and the audit trace constitution control processor 220 generate an audit record so as to allow restoration to a consistent state in case of a fault. Primary and backup ADP controls the access of a disk volume storing the audit trace file. Primary ADP is normally provided with the control of disk access but in case of a fault, it is replaced with backup. In order to allow this taking over, primary ADP sends a periodical check point to the backup including all disk state information necessary for smooth taking over. These processings mutually work by exchanging messages through a messaging system 222.