Techniques for efficiently transitioning object groups to low RPO replication mode

A system comprising:

• one or more processors;
• and
• a memory comprising code stored thereon that, when executed, performs a method comprising:
• establishing an asynchronous replication configuration of a replication session associated with i) a source volume group VG1 of source volumes on a source system, ii) a target volume group VG2 of target volumes on a target system, and iii) volume pairs each including a source volume of VG1 and a unique corresponding target volume of VG2, wherein the source volume and the corresponding target volume of said each volume pair are configured for asynchronous replication such that writes to the source volume are asynchronously replicated to the corresponding target volume;
• and
• performing first processing to transition the replication session to have a group level asynchronous replication mode denoting a low RPO (recovery point objective) replication mode comprising:
• setting the group level asynchronous replication for the replication session to an alternative asynchronous replication (AAR) mode, wherein each source volume of VG1 has an associated member level asynchronous replication mode denoting the AAR mode;
• transitioning the group level asynchronous replication mode of the replication session from the AAR mode to a hybrid mode, wherein i) at least one source volume of VG1 has a corresponding member level asynchronous replication mode of the AAR mode and ii) at least one source volume of VG1 has a corresponding member level asynchronous replication mode of the low RPO replication mode;
• creating a first snapset of snapshots of the source volumes of VG1, wherein the first snapset is a group level snapshot of the source volumes of VG1 taken at a same point in time;
• replicating each snapshot of the first snapset from the source system to the target system in either the low RPO replication mode or the AAR mode based on an associated member level asynchronous replication mode of a source volume of VG1 corresponding to said each snapshot;
• and
• constructing a second snapset of snapshots of target volumes of VG2 on the target system, wherein each snapshot of a target volume of VG2 in the second snapset denotes a same point in time copy as a corresponding snapshot of a source volume of VG1 in the first snapset.

A non-transitory computer-readable media comprising code stored thereon that, when executed, performs a method comprising:

• establishing an asynchronous replication configuration of a replication session associated with i) a source volume group VG1 of source volumes on a source system, ii) a target volume group VG2 of target volumes on a target system, and iii) volume pairs each including a source volume of VG1 and a unique corresponding target volume of VG2, wherein the source volume and the corresponding target volume of said each volume pair are configured for asynchronous replication such that writes to the source volume are asynchronously replicated to the corresponding target volume;
• and
• performing first processing to transition the replication session to have a group level asynchronous replication mode denoting a low RPO (recovery point objective) replication mode comprising:
• setting the group level asynchronous replication for the replication session to an alternative asynchronous replication (AAR) mode, wherein each source volume of VG1 has an associated member level asynchronous replication mode denoting the AAR mode;
• transitioning the group level asynchronous replication mode of the replication session from the AAR mode to a hybrid mode, wherein i) at least one source volume of VG1 has a corresponding member level asynchronous replication mode of the AAR mode and ii) at least one source volume of VG1 has a corresponding member level asynchronous replication mode of the low RPO replication mode;
• creating a first snapset of snapshots of the source volumes of VG1, wherein the first snapset is a group level snapshot of the source volumes of VG1 taken at a same point in time;
• replicating each snapshot of the first snapset from the source system to the target system in either the low RPO replication mode or the AAR mode based on an associated member level asynchronous replication mode of a source volume of VG1 corresponding to said each snapshot;
• and
• constructing a second snapset of snapshots of target volumes of VG2 on the target system, wherein each snapshot of a target volume of VG2 in the second snapset denotes a same point in time copy as a corresponding snapshot of a source volume of VG1 in the first snapset.