I/O request processing method, apparatus, and system, device, and storage medium

A system comprising:

• a first storage node;
• a second storage node;
• and
• a network forwarding device configured to:
• receive a first target I/O request, wherein the first target I/O request carries a first destination address and a target logical block address, and wherein the first destination address is a first node address of the first storage node;
• determine, based on a preset correspondence between a logical block address and a storage node, the second storage node corresponding to the target logical block address;
• modify, when the second storage node is not the first storage node, the first destination address in the first target I/O request to a second node address of the second storage node, to obtain a second target I/O request;
• send the second target I/O request to the second storage node;
• and
• send a third target I/O request to the first storage node,
• wherein the second storage node is configured to:
• receive the second target I/O request from the network forwarding device;
• perform I/O request processing based on the second target I/O request;
• and
• send, after completing the I/O request processing and using the first node address, a first I/O request processing completion notification to the first storage node, and
• wherein the first storage node is configured to:
• receive the third target I/O request;
• add a processed identifier to the third target I/O request;
• receive the first I/O request processing completion notification from the second storage node;
• and
• send a second I/O request processing completion notification to the network forwarding device in response to receiving the first I/O request processing completion notification.

A network forwarding device comprising:

• a memory configured to store computer instructions;
• and
• a processor configured to execute the computer instructions to cause the network forwarding device to:
• receive a first target input/output (I/O) request, wherein the first target I/O request carries a first destination address and a target logical block address, and wherein the first destination address is a first node address of a first storage node;
• determine, based on a preset correspondence between a logical block address and a storage node, a second storage node corresponding to the target logical block address;
• modify, when the second storage node is not the first storage node, the first destination address in the first target I/O request to a second node address of the second storage node, to obtain a second target I/O request;
• and
• send the second target I/O request to the second storage node.