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.

公开(公告)号：EP1962195A4

公开(公告)日：2009-01-21

申请号：EP06833755

申请日：2006-11-30

Applicant: IBM

Inventor： OZAWA YOHSUKE ,  NEYAMA RYOH ,  MIYASHITA HISASHI ,  TAKEUCHI MIKIO

IPC: G06F12/00 ,  G06F9/46 ,  G06F17/30

CPC classification number: G06F12/1416 ,  G06F17/30351

公开(公告)号：CA2657657A1

公开(公告)日：2007-06-07

申请号：CA2657657

申请日：2006-11-30

Applicant: IBM

Inventor： MIYASHITA HISASHI ,  NEYAMA RYOH ,  OZAWA YOHSUKE ,  TAKEUCHI MIKIO

IPC: G06F12/00

Abstract: [PROBLEMS] Access efficiency to data base is enhanced. [MEANS FOR SOLVING PROBLEMS] A data base stores a value corresponding to each one of a plurali ty of keys. A system of the present invention executes a plurality of transa ctions on the data base, acquires a referred value of a key from the data ba se which is referred to each transaction in response to its execution, and r ecords the same. In compliance with requests committed in a plurality of tra nsactions, a reply is then requested for a result table judged and arranged for result of each transaction to show whether the values of the keys stored in the database remain unchanged by other transactions and maintain the ref erred values as they are. Further, it is judged whether each transaction is successful based on the result table in reply and a transaction judged to be successful is only committed.