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AssigneeMicrosoft Technology Licensing, LLC
InventorsCristian C. Diaconu, Ryan L. Stonecipher, Michael James Zwilling, Marcel Van Der Holst
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The present invention extends to methods, systems, and computer program products for main-memory database checkpointing. Embodiments of the invention use a transaction log as an interface between online threads and a checkpoint subsystem. Using the transaction log as an interface reduces synchronization overhead between threads and the checkpoint subsystem. Transactions can be assigned to files and storage space can be reserved in a lock free manner to reduce overhead of checkpointing online transactions. Meta-data independent data files and delta files can be collapsed and merged to reduce storage overhead. Checkpoints can be updated incrementally such that changes made since the last checkpoint (and not all data) are flushed to disk. Checkpoint I/O is sequential, helping ensure higher performance of physical I/O layers. During recovery checkpoint files can be loaded into memory in parallel for multiple devices.
At a computer system, a method for updating a checkpoint for an database, the method comprising:
At a computer system, a method for managing storage resources consumed by checkpoint files, the method comprising:
At a computer system, the computer system including one or more processors and durable storage, a method for reestablishing state for a database, the method comprising:
Dependencies are inferred from the claim text.