1. A network connection retrieving method, adapted for retrieving connections between a plurality of network devices by a master device among the network devices in a local area network, the network connection retrieving method comprising:attempting to establish the connection with a current device among the network devices according to a pre-recorded network address of the current device;
sending a plurality of broadcast packets to each of the network devices in the local area network if the connection cannot be established, and collecting a response message returned from each of the network devices in response to the broadcast packets; and
identifying the response message returned from the current device by comparing unique identification information recorded in each of the response messages with pre-recorded unique identification information of each of the network devices, and re-establishing the connection with the current device by using a network address recorded in the response message, wherein
the master device is a client server in a Ceph storage architecture, and the rest of the network devices are storage servers in the Ceph storage architecture, and wherein
when the master device is disconnected from the current device, the master device attempts to retrieve the connection with the current device by the pre-recorded network address within a preset period, and if the connection cannot be retrieved within the preset period, the master device obtains the network address of the current device by sending the broadcast packets and collecting the response messages, and re-establishes the connection with the current device by using the obtained network address.