A method and apparatus are provided for controlling a client device in the communication field. The method may include: receiving a read-write request message sent by a client device; acquiring a first load amount of a shared storage system currently after processing the read-write request messages; sending processing result information resulted from processing the read-write request message to the client device, where the processing result information includes the first load amount; and causing the client device to adjust frequency of sending the read-write request message to the shared storage system according to the first load amount.