Replicating data across databases by utilizing validation functions for data completeness and sequencing

A system comprising:

• at least one processor;
• and
• a non-transitory computer readable medium comprising instructions that, when executed by the at least one processor, cause the system to:
• determine, in response to a request to merge data from one or more source servers to one or more destination servers, a plurality of database events corresponding to a card account transaction, wherein each database event of the plurality of database events comprises a database operation at the one or more source servers to write data to one or more database tables, delete data from the one or more database tables, or modify data at the one or more database tables, wherein determining the plurality of database events comprises:
• accessing the plurality of database events from a plurality of log files at a plurality of source database tables according to a source schema at the one or more source servers;
• and
• appending the plurality of database events from the plurality of source database tables into an event queue comprising an event history corresponding to the card account transaction;
• determine, for the plurality of database events, a plurality of database tables accessed at the one or more source servers to write, delete, or modify data in the plurality of database tables via a plurality of database operations in connection with the card account transaction according to event identifiers generated for the plurality of database events by the one or more source servers;
• validate, for the plurality of database tables, subsets of database events of the plurality of database events based on quantities of the subsets of database events and sequences of event identifiers generated for the subsets of database events by the one or more source servers;
• and
• replicate, in response to validating the subsets of database events, the plurality of database events from the one or more source servers to the one or more destination servers according to the source schema.

A non-transitory computer readable medium comprising instructions that, when executed by at least one processor, cause a computing device to:

• determine, in response to a request to merge data from one or more source servers to one or more destination servers, a plurality of database events corresponding to a card account transaction, wherein each database event of the plurality of database events comprises a database operation at the one or more source servers to write data to one or more database tables, delete data from the one or more database tables, or modify data at the one or more database tables, wherein determining the plurality of database events comprises:
• accessing the plurality of database events from a plurality of log files at a plurality of source database tables according to a source schema at the one or more source servers;
• and
• appending the plurality of database events from the plurality of source database tables into an event queue comprising an event history corresponding to the card account transaction;
• determine, for the plurality of database events, a plurality of database tables accessed at the one or more source servers to write, delete, or modify data in the plurality of database tables via a plurality of database operations in connection with the card account transaction according to event identifiers generated for the plurality of database events by the one or more source servers;
• validate, for the plurality of database tables, subsets of database events of the plurality of database events based on quantities of the subsets of database events and sequences of event identifiers generated for the subsets of database events by the one or more source servers;
• and
• replicate, in response to validating the subsets of database events, the plurality of database events from the one or more source servers to the one or more destination servers according to the source schema.