Abstract: Technology is described for a durable and provably complete archival of streaming data for a potentially indefinite retention period. According to the present technology, streaming data may be prepared for storage to meet completeness and consistency requirements that may result in once-and-only-once delivery and serialization of the streaming data. In one example, a storage preparation service may archive a data stream in real-time to a first data store that provides eventual write consistency and use another data store to provide a consistent view of the data. The storage preparation service may capture metadata that satisfies the completeness requirements and may provide conflict resolution to ensure write consistency.

Abstract: The disclosure is related to a system that saves booking requests to a transaction data store and generates data aggregations from the booking requests. A two-phase booking process is employed that includes validating the local timestamp of a booking request. Asynchronous archiving of booking requests to an archive is also employed. Aggregations can be generated from the transaction archive.

Abstract: Methods, systems, and computer-readable media for globally ordered event stream logging are disclosed. A first host of a plurality of hosts generates an additional chain of a stream comprising a plurality of chains and representing a globally ordered sequence of events. The first host sends information describing the additional chain to a second host. The second host receives a request to store a data object representing an event. The request is associated with a stream identifier of the stream. The second host stores, in the additional chain, the data object, a timestamp associated with the data object, and an identifier of the second host. The data object in the additional chain is associated with a position in the globally ordered sequence across the plurality of chains.