Abstract: The present invention provides systems and methods for an abstraction layer for an asynchronous, idempotent message channel useful for performing status updates between communicating processes via a protocol that reduces overhead. The system comprises a sink endpoint that is operative to send a status message, a data path that is operative to transmit the status message over a message channel, a source endpoint that is operative to receive the status message sent by the sink endpoint over the data path, and an abstraction layer that is operative to provide an interface between the sink endpoint and the source endpoint over the message channel, relaying the status message from the sink endpoint to the source endpoint according to an optimized algorithm.

Abstract: Techniques are provided for leveraging the abstraction of a document set to provide optimal throughput across document accessors when multiple document accessors are accessing the same document set. According to one aspect, the document accessors are not restricted to accessing documents in any particular document order. Rather, the state of each document accessor is maintained using the bitmaps, and an efficient cyclic array based data structure is used to track the document access-count state. Based on this information, the fetch order of the documents is determined dynamically, to maximize the cache hit rate experienced by the document accessors.