Storage systems configured for storage volume addition in synchronous replication using active-active configuration

A method comprising:

• identifying a storage volume to be added to a first consistency group of a first synchronous replication session between a first storage system and a second storage system in an active-active configuration;
• creating a second synchronous replication session for the added storage volume between the first storage system and the second storage system;
• and
• merging the first and second synchronous replication sessions responsive to one or more designated criteria;
• wherein creating a second synchronous replication session for the added storage volume comprises:
• creating first and second instances of a second consistency group on the respective first and second storage systems using respective instances of the added storage volume;
• creating a volume pairing between the instances of the added storage volume on the first and second storage systems in order to establish data path mapping between the instances of the added storage volume;
• copying a volume identity of the instance of the added storage volume on the first storage system to a volume identity of the instance of the added storage volume on the second storage system;
• disabling input-output access for the instance of the added storage volume on the second storage system;
• and
• creating the second synchronous replication session between the first and second instances of the second consistency group;
• and
• wherein the method is implemented by at least one processing device comprising a processor coupled to a memory.

A computer program product comprising a non-transitory processor-readable storage medium having stored therein program code of one or more software programs, wherein the program code when executed by at least one processing device causes said at least one processing device:

• to identify a storage volume to be added to a first consistency group of a first synchronous replication session between a first storage system and a second storage system in an active-active configuration;
• to create a second synchronous replication session for the added storage volume between the first storage system and the second storage system;
• and
• to merge the first and second synchronous replication sessions responsive to one or more designated criteria;
• wherein creating a second synchronous replication session for the added storage volume comprises:
• creating first and second instances of a second consistency group on the respective first and second storage systems using respective instances of the added storage volume;
• creating a volume pairing between the instances of the added storage volume on the first and second storage systems in order to establish data path mapping between the instances of the added storage volume;
• copying a volume identity of the instance of the added storage volume on the first storage system to a volume identity of the instance of the added storage volume on the second storage system;
• disabling input-output access for the instance of the added storage volume on the second storage system;
• and
• creating the second synchronous replication session between the first and second instances of the second consistency group.