Wal-mart Stores, Inc.

AnHai Doan

Anand Rajaraman

Wang Chee Lam

Zoheb Vacheri

Taraka Subrahmanya Prasad Siripurapu

Lu Liu

Disclosed are systems and methods for processing events in an event stream using a map-update application. The events may be embodied as a key-attribute pair. An event is processed by one or more instances implementing either a map or an update function. A map function receives an input event from the event stream and publishes one or more events to the event stream. An update function receives an event and updates a corresponding slate and publishes zero or more events. Systems and methods are also disclosed herein for implementing a map-update application in a multithreaded architecture and for handling overloading of a particular thread or node. Systems and methods for providing access to slates updated according to update operations are also disclosed.

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Madison, WI, United States of America

AnHai Doan