公开(公告)号：EP2352090A4

公开(公告)日：2015-05-06

申请号：EP09819051

申请日：2009-08-13

Applicant: IBM

Inventor： HORII HIROSHI ,  OZAWA YOHSUKE ,  ENOKI MIKI ,  ONODERA TAMIYA

IPC: G06F9/52 ,  G06F17/30

CPC classification number: H04L67/1097 ,  G06F9/52 ,  G06F17/30171 ,  G06F17/30362

Abstract: Problem To cause a system to operate efficiently regardless of the time of day. Solving Means There is provided a system including multiple application servers for accessing shared data and a centralized control unit for centrally controlling a lock applied to the shared data by each of the application servers. Each of the application servers includes a distributed control unit for controlling a lock applied to the shared data by the application server and a selection unit for selecting any one of distributed mode in which a lock is acquired from the distributed control unit and centralized mode in which a lock is acquired from the centralized control unit.