How Google Manages Data Across Data Centers

How does Google manage data across the many data centers the company operates? At the Google i/o Developer Conference in May, Google's Ryan Barrett discusses "multihoming" across multiple data center locations with large scale storage systems. Barrett's presentation examines different approaches to multi-homing, with a particular focus on how Google engineers the App Engine datastore. This video runs about 1 hour. (Link via High Scalability, which has additional commentary).

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