Method and system for concurrent database operation

A system, having at least one processor, storage, and a communication platform connected to a network for database operation, the system comprising:

• a request classifier configured to:
• receive, concurrently, a plurality of requests;
• and
• classify each of the plurality of requests into one of a scan request to obtain first data associated with a plurality of first keys stored in a database, a get request to obtain second data associated with a second key stored in the database, and a put request to update the database with third data associated with a third key, wherein the plurality of requests includes the scan request;
• and
• a data scanner configured to:
• receive the scan request from the request classifier;
• update a global version number upon receipt of the scan request;
• obtain the first data associated with the plurality of first keys based on the updated global version number;
• and
• providing the first data in response to the scan request.

A machine-readable tangible and non-transitory medium having information for database operation, when read by the machine, causes the machine to perform the following:

• receiving, concurrently, a plurality of requests which includes a scan request to obtain first data associated with a plurality of first keys stored in a database;
• updating a global version number upon receipt of the scan request;
• obtaining the first data associated with the plurality of first keys based on the updated global version number;
• and
• providing the first data in response to the scan request.