Siebel Systems, Inc.

Shuang Huang

Mark Coyle

Peter S Lim

Min Lu

Jeffrey Fischer

Alexander S Warshavsky

Techniques to support modification of certain data in a database during an upgrade to a new version. In one method, objects in an original database are marked as either modifiable or read-only, with changes being allowed for modifiable objects during the upgrade. An upgraded database of objects is generated based on objects in the original database (e.g., by copying objects in the original database and upgrading the copied objects to new schema and binaries). Changes to modifiable objects in the original database (e.g., after these objects have been copied) are logged. After the upgraded database has been created, objects in this database may be updated (e.g., individually or all at once) by identifying modifiable objects in the original database having changes not yet incorporated into the upgraded database and updating objects in the upgraded database based on the modified objects in the original database.

Method, system, and product for maintaining software objects during database upgrade

Techniques to track and publish changes to object instances. For an 'outbound process' to publish object instances, a list of object instances is initially received. For each received object instance, a determination is made whether or not the object instance has changed since its last publication. For each changed object instance, a delta snapshot is generated and includes data indicative of changes between the current and last published versions of the object instance. Delta snapshots for all changed object instances are then published. For an 'inbound process' to receive object instances, the published delta snapshots are initially received. For each received delta snapshot, the corresponding object instance is retrieved and updated with the changes included in the delta snapshot. A new snapshot is also generated for each updated object instance such that the received changes are not published, and unpublished changes made locally are noted for subsequent publication.

Growing community of inventors

Freemont, CA, United States of America

Shuang Huang