Network storage failover systems and associated methods

A method, comprising:

• receiving by a processor of a second storage node, a write request associated with a first storage object during a replay of entries of a log stored in a non-volatile memory of the second storage node for a failover operation, initiated in response to a failure at a first storage node responsible for managing the first storage object before the failure, wherein the second storage node operates as a partner node of the first storage node to mirror at the non-volatile memory one or more write requests associated with the first storage object and data associated with the one or more write requests received by the first storage node prior to the failure;
• determining by the processor, whether the write request has an entry in a filtering data structure that identifies each log entry and is generated using the log, prior to the replay;
• processing the write request by the processor, when the write request is not associated with any filtering data structure entry;
• determining by the processor that the write request is a re-try write request, when the write request is associated with a filtering data structure entry;
• and
• executing the re-try write request by the processor from the second storage node, during the replay at the second storage node.

A non-transitory machine readable medium having stored thereon instructions comprising machine executable code which when executed by a machine, causes the machine to:

• receive a read request associated with a first storage object, during a replay of entries of a log stored in a non-volatile memory of a second storage node for a failover operation, initiated in response to a failure at a first storage node responsible for managing the first storage object before the failure, wherein the second storage node operates as a partner node of the first storage node to mirror at the non-volatile memory one or more write requests associated with the first storage object and data associated with the one or more write requests received by the first storage node prior to the failure;
• determine whether the read request has an associated entry at a filtering data structure that is generated from the log to identify each log entry, prior to the replay;
• process the read request, when the filtering data structure does not include an entry associated with the read request;
• and
• utilize a location data structure to locate data associated with the read request at the non-volatile memory and provide the located data in response to the read request, when the filtering data structure includes an entry associated with the read request.