Oracle International Corporation

Victor Latushkin

Mark Maybee

James Kremer

Ankit Gureja

Gavin G Gibson

Mark J Musante

Pascal Ledru

Kimberly Morneau

Kenneth Dunlop

Natalie Ross

Prabahar Jeyaram

Yimin Ding

John William Poduska, Jr

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.

Consistent file system semantics with cloud object storage

File system hierarchies and functionality with cloud object storage

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.

Guaranteed file system hierarchy data integrity in cloud object stores

A virtual storage device may be generated that replicates a layout of a physical storage device it is replacing. The virtual storage device may be used to store data formerly stored in the physical storage device. The layout may detail various configurations of the physical storage device such as if the physical storage derive implements fixed or variable-block sizes and/or if it implements a level of redundant array of independent disks (RAID). By replicating the layout of a physical storage device that it may replace, the virtual storage device described within various embodiments may offer advantages over other virtual storage devices.

Methods to reduce storage capacity

Cloud gateway for ZFS snapshot generation and storage

Aspects of the present disclosure disclose systems and methods for managing a level-two persistent cache. In various aspects, a solid-state drive is employed as a level-two cache to expand the capacity of existing caches. In particular, any data that is scheduled to be evicted or otherwise removed from a level-one cache is stored in the level-two cache with corresponding metadata in a manner that is quickly retrievable. The data contained within the level-two cache is managing using a cache list that manages and/or maintains data chunk entries added to the level-two cache based on a temporal access of the data chunk.

Apparatus, system and method for managing a level-two cache of a storage appliance

Aspects of the present disclosure involve a level-two persistent cache. In various aspects, a solid-state drive is employed as a level-two cache to expand the capacity of existing caches. In particular, any data that is scheduled to be evicted or otherwise removed from a level-one cache is stored in the level-two cache with corresponding metadata in a manner that is quickly retrievable.

Apparatus, system and method for providing a persistent level-two cache

Aspects of the present disclosure disclose systems and methods for managing a level-two persistent cache. In various aspects, a solid-state drive is employed as a level-two cache to expand the capacity of existing caches. Any data stored in the level-two cache may be stored in a particular version or format of data known as 'raw' data, in contrast to storing the data in a 'cooked' version, as is typically stored in a level-one cache.

Apparatus system and method for providing raw data in a level-two cache

Growing community of inventors

Superior, CO, United States of America

Victor Latushkin