Microsoft Technology Licensing, LLC

Nandagopal Kirubanandan

Neal Robert Christiansen

David Matthew Kruse

Sarosh Cyrus Havewala

Mathew George

Senthil Rajaram

Christian Gregory Allred

Karan Mehra

Surendra Verma

Shiv Kumar Rajpal

Emanuel Paleologu

Shiv K Rajpal

Improved methods and systems for granular opportunistic locking mechanisms (oplocks) are provided for increasing file caching efficiency. Oplocks can be specified with a combination of three possible granular caching intentions: read, write, and/or handle. An oplock can be specified with an identifier that indicates a client/specific caller to avoid breaking the original oplock due to an incompatibility from other requests of the same client. An atomic oplock flag is added to create operations that allow callers to request an atomic open with an oplock with a given file.

Efficient file management through granular opportunistic locking

Techniques for recovery and redistribution of data from a virtual disk storage system are described herein. In one or more implementations, a storage scheme derived for a virtual disk configuration is configured to implement various recovery and redistribution designed to improve recovery performance. The storage scheme implements one or more allocation techniques to produce substantially uniform or nearly uniform distributions of data across physical storage devices associated with a virtual disk. The allocation facilitates concurrent regeneration and rebalancing operations for recovery of data in the event of failures. Additionally, the storage scheme is configured to implements parallelization techniques to perform the concurrent operations including but not limited to controlling multiple parallel read/writes during recovery.

Virtual disk recovery and redistribution

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Nandagopal Kirubanandan