System and method of processing sender requests for remote replication

A system of processing sender requests for remote replication, applied in a local system having a plurality of NBD, the system comprising:

• a creation module, for creating a fixed number of sender threads in the local system to form a sender thread pool;
• a linked list module, for serially connecting all the NBDs receiving a write request to a corresponding remote mirror volume to be a circular linked list;
• a pointer module, for setting a pointer to sequentially record latest processed NBD in the circular linked list and sequentially move the pointer to a next NBD according to the sequence of the NBDs in the circular linked list each time when the sender request of the latest processed NBD is finished, wherein a start position of the pointer points to a list head of the circular linked list;
• a thread allocation module, for allocating the sender threads in the sender thread pool to actively search the next NBD to be processed;
• a request receiving module, for receiving a new sender request and adding the new sender request to a sender request queue of a corresponding NBD;
• and
• a request processing module, for locking the processing of the next NBD pointed by the pointer by using the sender thread, and processing the sender request of the next NBD.