Google Inc.

Klas Olof Daniel Andersson

Johan Granström

Alexandru Tudor

Sai Suman Cherukuwada

Tamas Foldenyi

Techniques for recovery and fault-tolerance of a real time in-memory index are presented. A queue management component controls a queue component to have it communicate respective data segments of a data stream to respective partitions of a repository, based on a randomizing function, a stream ID of the data stream, and respective segment numbers of the respective segments. The repository stores data streams for a defined period of time. A driver component distributes queries to the partitions of the repository to request data stream segments, and the repository can provide segments that have not yet expired. The driver component aggregates the results to reproduce the data stream, which can be provided to a requesting client. When a partition is recovering from being offline, the partition can request that the queueing system re-deliver data segments over a specified time period, and the queue component can re-deliver the desired data segments.

Recovery and fault-tolerance of a real time in-memory index

Systems and methods for audio enhancements of media items are disclosed herein. When a media item such as a video that includes suitable audio content (e.g., a musical composition) is created and/or designated for upload to a video hosting site, an audio reference (e.g., a higher quality version of the musical composition) that matches the audio content can be automatically identified. A timing offset can be automatically determined and enhanced audio can be constructed by mixing the audio reference and the audio content aligned according to the timing offset.

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Stockholm, Sweden

Klas Olof Daniel Andersson