US 12,754,804 B2 · Methods and multi-site systems to provide recovery point objective (RPO) protection, snapshot retention between secondary storage site and tertiary storage site, and automatically initiating realignment and reconfiguration of a protection configuration from the secondary storage site to the tertiary storage site upon primary storage site failure

Abstract

Multi-site distributed storage systems and computer-implemented methods are described for providing common snapshot retention and automatic fanout reconfiguration for an asynchronous leg after a failure event that causes a failover from a primary storage site to a secondary storage site. A computer-implemented method comprises providing an asynchronous replication relationship with an asynchronous update schedule from one or more storage objects of the first storage node to one or more replicated storage objects of the third storage node, creating a snapshot copy of the one or more storage objects of the first storage node, transferring the snapshot copy to the third storage node based on an asynchronous mirror policy, and intercepting the snapshot create operation on the primary storage site and transferring the snapshot copy to the second storage node to provide a common snapshot between the second storage node and the third storage node.

Claims20

Dependent claims

A computer-implemented method performed by one or more processing resources of a multi-site distributed storage system with a primary storage site having a first storage node, a secondary storage site having a second storage node, and a tertiary storage site having a third storage node, the computer-implemented method comprising:

initiating a snapshot create operation to create a snapshot copy of one or more storage objects of the first storage node based on an asynchronous mirror policy from the one or more storage objects of the first storage node to one or more replicated storage objects of the third storage node;
and
intercepting the snapshot create operation on the primary storage site and synchronously replicating the snapshot create operation to transfer the snapshot copy to the second storage node to provide a common snapshot between the second storage node and the third storage node.

A multi-site distributed storage system including a primary storage site having a first storage node, a secondary storage site having a second storage node, and a tertiary storage site having a third storage node comprising:

one or more processing resources;
and
a non-transitory computer-readable medium coupled to the one or more processing resources, having stored therein instructions, which when executed by the one or more processing resources cause the one or more processing resources to:
initiate a snapshot create operation to create a snapshot copy of one or more storage objects of the first storage node based on an asynchronous mirror policy from the one or more storage objects of the first storage node to one or more replicated storage objects of the third storage node;
and
intercept the snapshot create operation on the primary storage site and synchronously replicating the snapshot create operation to transfer the snapshot copy to the second storage node to provide a common snapshot between the second storage node and the third storage node.

3 more elements

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

initiate a snapshot create operation to create a snapshot copy of one or more storage objects of a first storage node based on an asynchronous mirror policy from the one or more storage objects of the first storage node to one or more replicated storage objects of a third storage node;
and
intercept the snapshot create operation on the first storage node of a primary storage site and synchronously replicate the snapshot create operation to transfer the snapshot copy to a second storage node of a secondary storage site to provide a common snapshot between the second storage node and the third storage node.

Dependencies are inferred from the claim text.

Life of this patent

Life of this patent

Abstract

Claims20