公开(公告)号：JP2000132443A

公开(公告)日：2000-05-12

申请号：JP30100798

申请日：1998-10-22

Applicant: IBM

Inventor： NEGISHI YASUSHI ,  MOHAN AAJA ,  TAGO KAZUYA

IPC: G06F12/00 ,  G06F7/00 ,  H04L29/06 ,  H04L29/08

Abstract: PROBLEM TO BE SOLVED: To improve the communication efficiency when a replica is updated by providing a control means etc., which controls the updating execution timing of the replica set in response to a received changing request based on the information included in the changing request regardless of the receiving order of the changing request. SOLUTION: A replica controller 7 adds an access to be given the data stored in a data storing device 17 and also a packet transmission request to be given to a transmission queue 9 based on the access request given from an application 5. Then the controller 7 executes the updating of a replica in the designating timing and in response to the changing request stored in a reception queue 11 by referring to the state of the queue 11. The collisions of plural application 5 and the collision caused by the application 5 between the updating of data and the data updating request included in the queue 11 are not treated, and the execution of the data changing to be carried out by the application 5 is independent of the execution of the data changing request included in the queue 11.