公开(公告)号：US20250004887A1

公开(公告)日：2025-01-02

申请号：US18828089

申请日：2024-09-09

Applicant: NetApp, Inc.

Inventor： Parag SARFARE ,  Asif PATHAN ,  Amit BORASE ,  Nikhil MATTANKOT ,  Sudheer Kumar VAVILAPALLI ,  Stephen WU

IPC: G06F11/14

Abstract: Techniques are provided for a recovery process with selective ordering and concurrent operations in order to recover from a failure. Representations of active log structures are rebuilt within memory according to ordering values assigned to I/O operations logged within the active log structures. Representation of certain active log structures may be concurrently rebuilt based upon the active log structures comprising I/O operations that are non-overlapping within a distributed file system, have no dependencies, relate to different services, and/or target independent files. Representation of stale log structures are concurrently rebuilt within memory. While rebuilding the log structures and executing the I/O operations, a key value map is concurrently rebuilt within the memory for locating data of the I/O operations. Concurrent operations during the recovery process reduces the time to complete the recovery process, and thus reduces client downtime during the recovery process.

公开(公告)号：US20240054056A1

公开(公告)日：2024-02-15

申请号：US17886843

申请日：2022-08-12

Applicant: NetApp Inc.

Inventor： Parag SARFARE ,  Asif PATHAN ,  Amit BORASE ,  Nikhil MATTANKOT ,  Sudheer Kumar VAVILAPALLI ,  Stephen WU

IPC: G06F11/14

CPC classification number: G06F11/1469 ,  G06F11/1464 ,  G06F11/1471

Abstract: Techniques are provided for a recovery process with selective ordering and concurrent operations in order to recover from a failure. Representations of active log structures are rebuilt within memory according to ordering values assigned to I/O operations logged within the active log structures. Representation of certain active log structures may be concurrently rebuilt based upon the active log structures comprising I/O operations that are non-overlapping within a distributed file system, have no dependencies, relate to different services, and/or target independent files. Representation of stale log structures are concurrently rebuilt within memory. While rebuilding the log structures and executing the I/O operations, a key value map is concurrently rebuilt within the memory for locating data of the I/O operations. Concurrent operations during the recovery process reduces the time to complete the recovery process, and thus reduces client downtime during the recovery process.