A computer-implemented information acquiring method for execution by a primary proxy server, wherein the method comprises: receiving an information acquiring request sent by a first virtual machine, wherein the information acquiring request contains an identifier of the first virtual machine ; detecting whether locally cached configuration information contains first configuration information corresponding to the identifier of the first virtual machine ; if so, locally acquiring the first configuration information and sending the first configuration information to the first virtual machine ; otherwise, adding primary information to the information acquiring request, and sending the information acquiring request with the added primary information to a secondary proxy server ; receiving first configuration information fed back by the secondary proxy server according to the identifier of the first virtual machine and the primary information ; caching the received first configuration information and sending the received first configuration information to the first virtual machine ; receiving a second update notification sent by the secondary proxy server after the secondary proxy server receives a first update notification sent by an interface server, wherein the first update notification indicates change of configuration information in the interface server, and the second update notification indicates change of configuration information cached in the secondary proxy server; determining first to-be-updated configuration information according to the second update notification and sending an identifier of the first to-be-updated configuration information to the secondary proxy server; receiving first target configuration information which is fed back by the secondary proxy server according to the identifier of the first to-be-updated configuration information; updating the first to-be-updated configuration information with the first target configuration information. receiving an information acquiring request sent by a first virtual machine, wherein the information acquiring request contains an identifier of the first virtual machine ; detecting whether locally cached configuration information contains first configuration information corresponding to the identifier of the first virtual machine ; if so, locally acquiring the first configuration information and sending the first configuration information to the first virtual machine ; otherwise, adding primary information to the information acquiring request, and sending the information acquiring request with the added primary information to a secondary proxy server ; receiving first configuration information fed back by the secondary proxy server according to the identifier of the first virtual machine and the primary information ; caching the received first configuration information and sending the received first configuration information to the first virtual machine ; receiving a second update notification sent by the secondary proxy server after the secondary proxy server receives a first update notification sent by an interface server, wherein the first update notification indicates change of configuration information in the interface server, and the second update notification indicates change of configuration information cached in the secondary proxy server; determining first to-be-updated configuration information according to the second update notification and sending an identifier of the first to-be-updated configuration information to the secondary proxy server; receiving first target configuration information which is fed back by the secondary proxy server according to the identifier of the first to-be-updated configuration information; updating the first to-be-updated configuration information with the first target configuration information. <EOS>