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

A multi-site distributed storage system to provide recover point objective (RPO) protection and common snapshot retention 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:

• a processing resource;
• and
• a non-transitory computer-readable medium coupled to the processing resource, having stored therein instructions, which when executed by the processing resource cause the processing resource to:
• provide 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;
• initiate a snapshot create operation to create a snapshot copy of the one or more storage objects of the first storage node based on an asynchronous mirror policy;
• transfer the snapshot copy to the third storage node based on the asynchronous mirror policy;
• 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 to avoid a baseline data transfer from the second storage node to the third storage node if a failover occurs from the primary storage site to the secondary storage site.

A non-transitory computer-readable storage medium embodying a set of instructions, which when executed by a processing resource for providing recover point objective (RPO) protection and common snapshot retention cause the processing resource to:

• provide an asynchronous replication relationship with an asynchronous update schedule from one or more storage objects of a first storage node of a primary storage site to one or more replicated storage objects of a third storage node of a tertiary storage site;
• initiate a snapshot create operation to create a snapshot copy of the one or more storage objects of the first storage node based on an asynchronous mirror policy;
• transfer the snapshot copy to the third storage node based on the asynchronous mirror policy;
• and
• intercept the snapshot create operation on the 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 to avoid a baseline data transfer from the second storage node to the third storage node if a failover occurs from the primary storage site to the secondary storage site.