Oracle International Corporation

Natalie Ross

Mark Maybee

James Kremer

Gavin G Gibson

Victor Latushkin

Pascal Ledru

Ankit Gureja

Kimberly Morneau

Roch Bourbonnais

Blaise Sanouillet

Peter Dunlap

Jinfei Zhang

Jingfei Zhang

Techniques described herein relate to systems and methods of data storage, and more particularly to providing layering of file system functionality on an object interface. In certain embodiments, file system functionality may be layered on cloud object interfaces to provide cloud-based storage while allowing for functionality expected from a legacy applications. For instance, POSIX interfaces and semantics may be layered on cloud-based storage, while providing access to data in a manner consistent with file-based access with data organization in name hierarchies. Various embodiments also may provide for memory mapping of data so that memory map changes are reflected in persistent storage while ensuring consistency between memory map changes and writes. For example, by transforming a ZFS file system disk-based storage into ZFS cloud-based storage, the ZFS file system gains the elastic nature of cloud storage.

File system hierarchies and functionality with cloud object storage

Implementations described and claimed herein provide systems and method for prefetching data. In one implementation, whether a read request for a first data block is part of a sequential access stream is determined. A first trigger for a subsequent data block in the sequential access stream is recorded. A first set of data blocks is prefetched. The first set of data blocks is defined by a first prefetch window associated with the first trigger. A second trigger is recorded for a second subsequent data block in the sequential access stream. A second set of data blocks is prefetched. The second set of data blocks is defined by a second prefetch window associated with the first trigger. A size of the prefetch windows may be dynamically adjusted based on resource contention with the prefetching.

Systems and methods for prefetching data

Growing community of inventors

Louisville, CO, United States of America

Natalie Ross