Mediator assisted switchover between clusters

A non-transitory machine readable medium comprising instructions for performing a method, which when executed by a machine, causes the machine to:

• perform an initial quorum vote, before execution of a read operation, corresponding to a first local vote derived from whether a set of local mailbox storage devices are operational, a first remote vote derived from whether a set of remote mailbox storage devices are operational, and a first mediator vote derived from whether a mediator mailbox storage device is operational;
• execute the read operation to read metadata;
• perform a final quorum vote, after execution of the read operation, corresponding to a second local vote derived from whether the set of local mailbox storage devices are operational, a second remote vote derived from whether the set of remote mailbox storage devices are operational, and a second mediator vote derived from whether the mediator mailbox storage device is operational;
• and
• designate the read operation as either successful or failed based upon the initial quorum vote and the final quorum vote.

A computing device comprising:

• a memory comprising machine executable code for performing a method;
• and
• a processor coupled to the memory, the processor configured to execute the machine executable code to cause the processor to:
• perform an initial quorum vote, before execution of an operation, corresponding to a first local vote derived from whether a set of local mailbox storage devices are operational, a first remote vote derived from whether a set of remote mailbox storage devices are operational, and a first mediator vote derived from whether a mediator mailbox storage device is operational;
• execute the operation associated with metadata
• perform a final quorum vote, after execution of the operation, corresponding to a second local vote derived from whether the set of local mailbox storage devices are operational, a second remote vote derived from whether the set of remote mailbox storage devices are operational, and a second mediator vote derived from whether the mediator mailbox storage device is operational;
• and
• designate the operation as either successful or failed based upon the initial quorum vote and the final quorum vote.