Methods and apparatus for managing a database in a distributed o

Details Methods and apparatus for managing a database in a distributed o Methods and apparatus for managing a database in a distributed o

1995-03-31

1998-03-10

Black, Thomas G.

395608, 395618, 395705, G06F 1730

Patent

active

057272034

ABSTRACT:
A variety of methods and apparatus for managing a database in a object oriented environment are disclosed. According to the present invention, a database is provided which includes a database cache and a persistent database portion. Clients of the database are able to write quickly and asynchronously to the database cache, which may be located in transient memory such as random access memory. In order to maintain consistency between the state of the client and the state in the database, the data in the database cache must be written to the persistent database portion. In preferred embodiments a time commit thread executing in a computer process will, in single operations performed at predetermined intervals and when predetermined conditions are met, commit the data in the database cache into the persistent database portion. Thus through the strategies of the present invention, a single client database can have multiple clients. Clients of the database may be a variety of computer entities which require a mechanism for maintaining persistent state. In particular, objects are contemplated. In an apparatus embodiment of the present invention, a computer system having a central processing unit, a transient memory, a persistent memory, and a database is disclosed.

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