Method, electronic device and computer program product for storage management

An electronic device, comprising:

• at least one processing unit;
• and
• at least one memory coupled to the at least one processing unit and storing instructions configured to be executed by the at least one processing unit, wherein the instructions, when executed by the at least one processing unit, cause the electronic device to perform actions comprising:
• receiving an access request for target metadata from a user at a node among a plurality of nodes included in a data protection system, wherein the access request comprises an identification of the target metadata and initiation time of the access request;
• based on the identification, acquiring target access information corresponding to the identification from a set of access information for the user, wherein the target access information records information related to access to the target metadata, wherein a replacement model is used to manage the set of access information stored in the node;
• when the target access information is acquired, determining the target metadata based on the target access information;
• and
• acquiring the target metadata, wherein acquiring the target metadata comprises:
• determining a difference between the initiation time and update time of the target access information;
• when the difference exceeds a threshold difference,
• sending the identification to other nodes of the plurality of nodes;
• receiving the target metadata from the other nodes;
• and
• providing the target metadata to the user;
• when the difference is lower than the threshold difference,
• determining a metadata content in the target access information as the target metadata;
• sending the identification to the other nodes;
• receiving updated target metadata from the other nodes;
• based on the updated target metadata, updating the metadata content;
• based on the initiation time, updating the update time in the target access information;
• and
• providing the updated target metadata to the user.

A computer program product tangibly stored on a non-transitory computer-readable medium and comprising machine-executable instructions, wherein the machine-executable instructions, when executed, cause a machine to perform steps of a method, the method comprising:

• receiving an access request for target metadata from a user at a node among a plurality of nodes included in a data protection system, wherein the access request comprises an identification of the target metadata and initiation time of the access request;
• based on the identification, acquiring target access information corresponding to the identification from a set of access information for the user, wherein the target access information records information related to access to the target metadata, wherein a replacement model is used to manage the set of access information stored in the node;
• when the target access information is acquired, determining the target metadata based on the target access information;
• and
• acquiring the target metadata, wherein acquiring the target metadata comprises:
• determining a difference between the initiation time and update time of the target access information;
• when the difference exceeds a threshold difference,
• sending the identification to other nodes of the plurality of nodes;
• receiving the target metadata from the other nodes;
• and
• providing the target metadata to the user;
• when the difference is lower than the threshold difference,
• determining a metadata content in the target access information as the target metadata;
• sending the identification to the other nodes;
• receiving updated target metadata from the other nodes;
• based on the updated target metadata, updating the metadata content;
• based on the initiation time, updating the update time in the target access information;
• and
• providing the updated target metadata to the user.