公开(公告)号：US20230409559A1

公开(公告)日：2023-12-21

申请号：US18162459

申请日：2023-01-31

Applicant: Oracle International Corporation

Inventor： Satish Kumar Kashi Visvanathan ,  Viggnesh Venugopal ,  Stephen Anthony Fridella ,  Ashwin Vijayavel

IPC: G06F16/23 ,  G06F16/27 ,  G06F11/14

CPC classification number: G06F16/2365 ,  G06F2201/84 ,  G06F11/1464 ,  G06F16/27

Abstract: Novel techniques are described for maintaining file consistency between different cloud infrastructure regions during cross-region file storage replication. The novel techniques comprise upon detecting a file deletion status (i.e., a file directory entry version marked as deletion) in a source file system during a replication cycle, retrieving file name from a valid file directory entry of a prior snapshot to construct a temporary file directory entry containing necessary information for a target file system to reconstruct a duplicate file directory entry version marked as deletion. The temporary file directory entry is transferred from the source file system to the target file system during the same replication cycle.

公开(公告)号：US20240061814A1

公开(公告)日：2024-02-22

申请号：US18497877

申请日：2023-10-30

Applicant: Oracle International Corporation

Inventor： Satish Kumar Kashi Visvanathan ,  Viggenesh Venugopal ,  Stephen Anthony Fridella ,  Ashwin Vijayavel

IPC: G06F16/178 ,  G06F12/02

CPC classification number: G06F16/178 ,  G06F12/0253

Abstract: Techniques are described for enabling concurrent cross-region replications and garbage collection while maintaining consistency and data integrity among file systems. In some embodiments, techniques for garbage collection fencing utilize a system-level garbage fencing key (GC fencing key) and one or more job-level GC fencing keys in a source file system that perform one or more cross-region replications with one or more target file systems, one replication and one job-level GC fencing key per target file system. In some embodiments, one job-level GC fencing key in a source file system and one job-level GC fencing key in a source file system together provide garbage fencing for a cross-region replication. In certain embodiments, the metadata information in a GC fencing key can inform, instruct, or be used to configure garbage collectors to skip garbage collection for a range of snapshots in a file system.