US 2025/0053488 A1 · METHODS AND SYSTEMS TO IMPROVE INPUT/OUTPUT (I/O) RESUMPTION TIME BY BATCHING MULTIPLE NON-CONFLICTING OPERATIONS DURING A NON-DISRUPTIVE AUTOMATIC UNPLANNED FAILOVER FROM A PRIMARY COPY OF DATA AT A PRIMARY STORAGE SYSTEM TO A MIRROR COPY OF THE DATA AT A CROSS-SITE SECONDARY STORAGE SYSTEM

Abstract

Multi-site distributed storage systems and computer-implemented methods are described for improving a resumption time of input/output (I/O) operations during an automatic unplanned failover (AUFO). A computer-implemented method includes determining, with a second storage cluster, whether heartbeat information from one or more storage objects of a CG of a first set of CGs is received during a time period, determining an out of sync state for a data replication relationship between the CG of the first set of CGs and a mirrored CG of a second set of CGs when the heartbeat information is not received during the time period and sending a single bulk role change call with a cluster identifier from the second cluster to an external mediator to provide a role change from follower to leader in the second set of CGs.

Claims20

Dependent claims

A computer-implemented method performed by one or more processors of a multi-site distributed storage system comprising:

determining, with a second storage cluster of the multi-site distributed storage system, whether heartbeat information from one or more storage objects of a consistency group (CG) of a first set of CGs of a first storage cluster of the multi-site distributed storage system is received during a time period;
and
sending a single bulk role change call with a cluster identifier from the second storage cluster to an external mediator to provide a role change from a follower to a leader in a mirrored CG of a second set of CGs of the second storage cluster based on an out of sync (OOS) state for the CG of the first set of CGs when heartbeat information is not received from the one or more storage objects of the CG of the first set of CGs.

A non-transitory computer-readable storage medium embodying a set of instructions, which when executed by one or more processing resources of a multi-site distributed storage system cause the one or more processing resources to:

determine, with a second storage cluster of the multi-site distributed storage system, whether heartbeat information from one or more storage objects of a consistency group (CG) of a first set of CGs of a first storage cluster of the multi-site distributed storage system is received during a time period;
and
send a single bulk role change call with a cluster identifier from the second storage cluster to an external mediator to provide a role change from a follower to a leader in a mirrored CG of a second set of CGs of the second storage cluster based on an out of sync (OOS) state for the CG of the first set of CGs when heartbeat information is not received from the one or more storage objects of the CG of the first set of CGs.

A multi-site distributed storage system comprising:

a primary storage site with a first cluster having a first set of consistency groups (CGs) initially with a leader role;
and
a secondary storage site with a second cluster having a second mirrored set of CGs initially with a follower role, wherein one or more processors is configured to determine whether heartbeat information from one or more storage objects of a consistency group (CG) of the first set of CGs of the first storage cluster of the multi-site distribution storage system is received by the second cluster during a time period;
and
to start an automatic unplanned failover (AUFO) with a single execution context for a mirrored CG of the second mirrored set of CGs when the heartbeat information from one or more storage objects of the CG of the first set of CGs is not received during the time period.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

18/928,972Filed 28 Oct 2024

Priority

28 Jul 2022

Published

13 Feb 2025

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

G06F 11/2023
Where processing functionality is redundant: failover techniques
G06F 11/2097
Using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements: maintaining the standby controller/processing…
G06F 3/0619
Improving the reliability of storage systems: in relation to data integrity, e.g. data losses, bit errors
G06F 11/2012
Where interconnections or communication control functionality are redundant: and using different communication protocols

Methods and systems to improve input/output (i/o) resumption time by batching multiple non-conflicting operations during a non-disruptive automatic unplanned failover from a primary copy of data at a primary storage system to a mirror copy of the data at a cross-site secondary storage system

Life of this patent

Methods and systems to improve input/output (i/o) resumption time by batching multiple non-conflicting operations during a non-disruptive automatic unplanned failover from a primary copy of data at a primary storage system to a mirror copy of the data at a cross-site secondary storage system

Life of this patent

Abstract

Claims20