International Business Machines Corporation

Ronald Elliott Parrish

Jeffrey Mark Nick

David Harold Surman

Michael D Swanson

James C Kleewein

Kelly B Pushong

Steven Victor Kauffman

Ruth A Allen

Jaime F Anaya

David L Levish

Lara Marie Lewis

Lisa M Goetze

Stephanie H Lee

William J Baer

Jane K Doong

Roger L Brockmeyer

Jung-hsin Eva Hu

Roger L Brookmeyer

Provided are techniques for using a series of compare and swap operations to assign a Relative Byte Address (RBA) and a Logical Record Sequence Number (LRSN) to a log record. One or more log buffers for storing the log record are identified, and the log record is moved to the one or more log buffers.

Creating and maintaining order of a log stream

An object management system for storing persistent object oriented objects, includes an object vault, a structural type manager and a digital library. The object vault is connected to the structural type manager and the digital library is connected to the structural type manager. An application program is connected to the object vault. Objects to be stored are represented as a Key Value Dictionary (KVD) in which attributes, or metadata, relating to the objects are stored as key-value pairs. Objects are categorized as having different structural types in which certain attributes for objects having the same structural type are cataloged to facilitate indexing and searching for the objects. The structural type manager maintains a mapping between structural types and a subset of keys for the structural types as well as corresponding database references for cataloging the object attributes. Also disclosed is a method of storing objects in the digital library where the corresponding database references for the subset of keys are retrieved from the structural type manager. The values corresponding to the subset of keys are retrieved from the Key Value Dictionary and stored in the library catalog. The Key Value Dictionary is serialized and stored in the digital library, and a signature is returned. The object stored in the digital library is retrieved by locating the objected based on the cataloged key values. Preferably the persistent objects are Java programming language objects.

Object management system for digital libraries

The present invention is directed to a method and apparatus for supporting large digital objects. More particularly it relates to a client/server library system in which a large digital object is divided into smaller pieces which are stored in the client/server library system. By dividing the large digital object into smaller pieces, system limitations regarding object size are avoided. In one embodiment of the present invention the pieces are stored as files of variable size. Moreover, the pieces can be stored on separate object servers which can be located remotely from one another.

Method and apparatus for dividing, mapping and storing large digital

A method for coordinating phases of program execution within a data processing system. One or more program defined synchronization events are established. Each synchronization event is responded to by one or more programs to coordinate phases of execution. The operating system notifies the one or more programs when all responses are received. A next program defined synchronization event may be established after a response is received for a previous synchronization event.

Method for coordinating executing programs in a data processing system

A method and system for rebuilding storage structures located within one or more structure processing facilities of a data processing system. A connection is made to a first storage structure having a name and one or more predefined characteristics. Thereafter, a second storage structure is allocated having the same name as the first structure, however, one or more of the predefined characteristics of the second structure are different than the predefined characteristics of the first structure. The second structure may be used for planned system reconfigurations or for recovery from system failures. During the rebuilding process, notification of phases of the rebuilding process are given to the active users. Further, a capability is provided for terminating the rebuilding process. In addition, a method and system for coordinating phases of user defined processing is provided.

Method and system for reconfiguring a storage structure within a

Growing community of inventors

San Jose, CA, United States of America

Ronald Elliott Parrish