I/o request processing method and device

A data processing method, wherein the method is performed by a control node in a storage system, the storage system and a host communicate with each other by using the NVMeoF (Non-Volatile Memory express over Fabric) protocol, the storage system comprises a logical disk, and the method comprises:

• receiving a state query command sent by the host, wherein the state query command is configured to instruct the control node to report a path state of a path corresponding to the control node;
• when the logical disk comprises an access interval, reporting, to the host, a path state indicating that the logical disk comprises the access interval;
• receiving an access interval query command sent by the host based on the path state;
• and
• reporting, to the host based on the access interval query command, access interval information of an access interval allocated to the control node to facilitate the host to record a mapping relationship between the access interval information and the control node.

A host, communicating with a storage system by using a Non-Volatile Memory express over Fabric (NVMeoF) protocol, the host accesses a logical disk of storage system through a control node in the storage system, and the host comprises:

• a memory storing instructions;
• and
• a processor coupled to the memory to execute the instructions to:
• send a state query command to the control node, wherein the state query command is configured to instruct the control node to report a path state of a path corresponding to the control node;
• receive the path state reported by the control node;
• send an interval query command to the control node when the received path state indicates that the logical disk comprises an access interval;
• receive access interval information reported by the control node, wherein an access interval indicated by the access interval information is pre-allocated to the control node;
• and
• record a mapping relationship between the control node and the access interval information.

A control node in a storage system, the storage system and a host communicate with each other by using a Non-Volatile Memory express over Fabric (NVMeoF) protocol, and the control node comprises:

• a memory storing instructions;
• and
• a processor coupled to the memory to execute the instructions to:
• receive a state query command sent by the host, wherein the state query command is used to instruct the control node to report a path state of a path corresponding to the control node;
• report, to the host, a path state indicating that the logical disk comprises the access interval;
• receive an access interval query command sent by the host based on the path state;
• and
• report, to the host based on the access interval query command, access interval information of an access interval allocated to the control node.