Data synchronization method, system, and apparatus using a work log for synchronizing data greater than a threshold value

An apparatus comprising:

• at least one memory configured to store computer program code;
• and
• at least one processor configured to access the at least one memory and operate according to the computer program code, the computer program code including:
• receiving code configured to cause the at least one processor to receive, by at least one processor, an uploading request from a client, the uploading request comprising data to be uploaded;
• responding code configured to cause the at least one processor to respond, by the at least one processor, to the uploading request after the data is obtained successfully from the client;
• storing code configured to cause the at least one processor to locally store the obtained data;
• initiating code configured to cause the at least one processor to, when the size of the data is less than a threshold value, initiate a synchronization request to a standby server for requesting the standby server to store the data;
• first generating code configured to cause the at least one processor to, when the size of the data is greater than or equal to the threshold value, not initiate the synchronization request, and generate and store a work log comprising indication information for indicating data that has not been synchronized to the standby server;
• reading code configured to cause the at least one processor to read the indication information from the work log;
• sending code configured to cause the at least one processor to locally read the data that has not been synchronized to the standby server according to the indication information, and send the data that has not been synchronized to the standby server to be stored;
• and
• first work log generating code configured to cause the at least one processor to generate and store another work log comprising information about the obtained data, in response to the obtained data being synchronized successfully to the standby server,
• wherein the responding to the uploading request and the sending the data that has not been synchronized to the standby server occur asynchronously, and
• wherein the computer program code further comprises:
• first reading code configured to cause the at least one processor to read multiple pieces of the another work log;
• second reading code configured to cause the at least one processor to read the information about the obtained data from the another work log for each piece of the another work log, and locally obtain first data and a first verification code of the first data according to the information about the obtained data;
• verification code configured to cause the at least one processor to obtain second data and a second verification code of the second data from the standby server according to the information about the obtained data;
• and
• sending code configured to cause the at least one processor to, in response to the first verification code being inconsistent with the second verification code, send the first data to the standby server to replace the second data with the first data to synchronize the obtained data.

A non-transitory computer readable medium storing computer program code which, when executed by at least one processor, performs the following operations:

• receiving, by at least one processor, an uploading request from a client, the uploading request comprising data to be uploaded;
• responding, by the at least one processor, to the uploading request after the data is obtained successfully from the client;
• locally storing the obtained data;
• when the size of the data is less than a threshold value, initiating a synchronization request to a standby server for requesting the standby server to store the data;
• when the size of the data is greater than or equal to the threshold value, not initiating the synchronization request, and generating and storing a work log comprising indication information for indicating data that has not been synchronized to the standby server;
• reading the indication information from the work log;
• locally reading the data that has not been synchronized to the standby server according to the indication information, and sending the data that has not been synchronized to the standby server to be stored;
• and
• generating and storing another work log comprising information about the obtained data, in response to the obtained data being synchronized successfully to the standby server,
• wherein the responding to the uploading request and the sending the data that has not been synchronized to the standby server occur asynchronously, and
• wherein the at least one processor further performs:
• reading multiple pieces of the another work log;
• reading the information about the obtained data from the another work log for each piece of the another work log, and locally obtaining first data and a first verification code of the first data according to the information about the obtained data;
• obtaining second data and a second verification code of the second data from the standby server according to the information about the obtained data;
• and
• in response to the first verification code being inconsistent with the second verification code, sending the first data to the standby server to replace the second data with the first data to synchronize the obtained data.