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1. (WO2018129137) CLOUD MIGRATION OF FILE SYSTEM DATA HIERARCHIES

Pub. No.:    WO/2018/129137    International Application No.:    PCT/US2018/012313
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Fri Jan 05 00:59:59 CET 2018
IPC: G06F 3/06
Applicants: ORACLE INTERNATIONAL CORPORATION
Inventors: MAYBEE, Mark
KRAMER, James
LEDRU, Pascal
Title: CLOUD MIGRATION OF FILE SYSTEM DATA HIERARCHIES
Abstract:
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.