Non-disruptive transition to synchronous replication state

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

• log metadata operations, executed upon a first storage object, into a metadata log;
• track dirty data, modified by data operations executed upon the first storage object, into a dirty region log;
• replicate the metadata operations from the metadata log to a second storage object during a metadata drain phase, wherein incoming metadata operations are logged into the metadata log during the metadata drain phase;
• replicate the dirty data from the first storage object, as indicated by the dirty region log, to the second storage object during a data drain phase triggered in response to completion of the metadata drain phase;
• and
• in response to completion of the metadata drain phase triggering a state transition from the metadata drain phase to the data drain phase where the dirty data is replicated after completion of the metadata drain phase from the metadata log being empty, trigger a transition from logging the incoming metadata operations into the metadata log to replicate the incoming metadata operations to the second storage object.

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:
• log metadata operations, executed upon a first storage object, into a metadata log;
• track dirty data, modified by data operations executed upon the first storage object, into a dirty region log;
• replicate the metadata operations from the metadata log to a second storage object during a metadata drain phase, wherein incoming metadata operations are logged into the metadata log during the metadata drain phase;
• replicate the dirty data from the first storage object, as indicated by the dirty region log, to the second storage object during a data drain phase triggered in response to completion of the metadata drain phase;
• and
• in response to completion of the metadata drain phase triggering a state transition from the metadata drain phase to the data drain phase where the dirty data is replicated after completion of the metadata drain phase from the metadata log being empty, trigger a transition from logging the incoming metadata operations into the metadata log to replicate the incoming metadata operations to the second storage object.