Method and computation node for processing application data

A method for processing application data, applied to a single computation node, wherein the single computation node comprising a processor coupled to a memory, which executes stored instructions comprising at least an operating system;

• a backup software and one or more application software running on the operating system within the single computation node to configure the single computation node to perform functions, comprising:
• creating, by the operating system, a service process with a root operation right and a user identifier (uid), wherein the uid is set as exactly the same as the uid of the backup software;
• establishing, by the operating system, a socket connection between the service process and the backup software;
• receiving, by the service process through the socket connection, a processing request for application data from the backup software;
• sending, by the service process, the processing request for application data to a corresponding application software;
• receiving, by the service process, application data returned by the corresponding application software, wherein the application data comprises application data returned in response to the processing request;
• and
• sending, by the service process through the socket connection, the returned application data to the backup software.