1. A snapshot generating method comprising: receiving a snapshot creation request for an application, wherein the snapshot creation request for the application carries an identifier of the application, and wherein the snapshot creation request is used to instruct that a snapshot be created for data of the application; determining, according to the identifier of the application, a plurality of virtual machines where the application runs; determining a deployment server of the plurality of virtual machines; and sending a snapshot instruction to the deployment server of the plurality of virtual machines, wherein the snapshot instruction is used to instruct the deployment server to perform consistent snapshot operations on data of the plurality of virtual machines, so as to generate snapshot files of the plurality of virtual machines.