Fault Response Models For Data Replication Spanning Different Methodologies

A storage system comprising a computer processor and a computer memory operatively coupled to the computer processor, the computer memory storing computer program instructions that, when executed by the computer processor, cause the storage system to carry out the steps of:

• determining that one or more storage systems, of a plurality of storage systems that uses a first fault response model, are experiencing a change in availability of a first mediation service used in the first fault response model that is external to the plurality of storage systems;
• and
• based on the determination, communicating a different fault response model among the plurality of storage systems, wherein use of the different fault response model involves responding to faults using one or more methods that include a mediation service that is different from the first mediation service as well as at least one method that is not based on use of mediation services.

An apparatus comprising a computer processor and a computer memory operatively coupled to the computer processor, the computer memory storing computer program instructions that, when executed by the computer processor, cause the apparatus to carry out the steps of:

• determining that one or more storage systems, of a plurality of storage systems that uses a first fault response model, are experiencing a change in availability of a first mediation service used in the first fault response model that is external to the plurality of storage systems;
• and
• based on the determination, communicating a different fault response model among the plurality of storage systems, wherein use of the different fault response model involves responding to faults using one or more methods that include a mediation service that is different from the first mediation service as well as at least one method that is not based on use of mediation services.