US 2024/0393973 A1 · RESYNCHRONIZATION OF INDIVIDUAL VOLUMES OF A CONSISTENCY GROUP (CG) WITHIN A CROSS-SITE STORAGE SOLUTION WHILE MAINTAINING SYNCHRONIZATION OF OTHER VOLUMES OF THE CG

Abstract

Systems and methods are provided for bringing a volume of a consistency group (CG) into an in-synchronization (InSync) state while other volumes of the CG remain in the InSync state. According to an example, in order to support recovery from disruptive events in a manner that ensures a zero recovery point objective (RPO) guarantee and insulates an application making use of the CG from adverse impacts, responsive to a triggering event, a Fast Resync process may first be attempted to promptly bring an affected volume back into an in-synchronization (InSync) state from an out of synchronization (OOS) state while allowing other members of the CG to remain in the InSync state. Should the Fast resync process be unsuccessful in bringing the volume back into the InSync state within a predetermined or configurable time threshold, then a second type of resynchronization process may be employed at the CG level.

Claims20

Dependent claims

A method comprising:

maintaining information regarding a state of data replication between a primary volume and a secondary volume of a plurality of volume pairs, wherein the primary volume of a given volume pair of the plurality of volume pairs is a member of a local consistency group (CG) of a primary cluster of a distributed storage system on which a primary dataset is stored and the secondary volume of the given volume pair is a member of a remote CG of a secondary cluster of the distributed storage system on which a mirror copy of the primary dataset is stored;
and
bringing a first volume pair of the plurality of volume pairs for which the state of data replication is out-of-synchronization into synchronization, by selectively employing one or more of a first resynchronization process and a second resynchronization process.

A distributed storage system comprising:

one or more processing resources;
and
instructions that when executed by the one or more processing resources cause the distributed storage system to:
maintain information regarding a state of data replication between a primary volume and a secondary volume of a plurality of volume pairs, wherein the primary volume of a given volume pair of the plurality of volume pairs is a member of a local consistency group (CG) of a primary cluster of a distributed storage system on which a primary dataset is stored and the secondary volume of the given volume pair is a member of a remote CG of a secondary cluster of the distributed storage system on which a mirror copy of the primary dataset is stored;
and
bring a first volume pair of the plurality of volume pairs for which the state of data replication is out-of-synchronization into synchronization, by selectively employing one or more of a first resynchronization process and a second resynchronization process.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

18/673,753Filed 24 May 2024

Priority

7 Oct 2021

Published

28 Nov 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

G06F 3/065
Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems: replication mechanisms
G06F 3/0619
Improving the reliability of storage systems: in relation to data integrity, e.g. data losses, bit errors
G06F 3/0644
Organizing or formatting or addressing of data: management of space entities, e.g. partitions, extents, pools
G06F 3/067
Adopting a particular infrastructure: distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]

Family

Application17/495,990Continuation · filed 7 Oct 2021

Application18/053,561Continuation · filed 8 Nov 2022

Application18/673,753Continuation

US 11,537,314 B1Related patent

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US 12,578,896 B2Related patent

US 2023/0110776 A1Published application

US 2024/0393973 A1This patent

From the US filing history. Foreign family members aren’t listed.

Resynchronization of individual volumes of a consistency group (cg) within a cross-site storage solution while maintaining synchronization of other volumes of the cg

Life of this patent

Resynchronization of individual volumes of a consistency group (cg) within a cross-site storage solution while maintaining synchronization of other volumes of the cg

Life of this patent

Abstract

Claims20