Alibaba Group Holding Limited

Lin Zhao

Hai Wang

Qing Zhang

Yina Zhang

Data synchronization includes establishing a plurality of target data tables based on a source data table in which data to be synchronized is stored, determining a current target data table from the plurality of target data tables, synchronizing the source data table and the current target data table, and directing an application server to access the current target data table upon successful completion of synchronization.

Method and system for efficient data synchronization

The present disclosure provides a method of statistical application in an OLTP environment to reduce the intensive computational load of invoking SQL statements for statistical calculations. The method introduces a time element into statistical records, and use the time element to determine the time status of previously computed statistical records. Upon receiving a query for a statistical record, the system first searches for an existing copy of the statistical record, and checks the time status of the statistical record if found. The system sends the statistical record to the inquirer if the record exists and is unexpired, and invokes an SQL statement to compute the statistical record only if the record does not exist or has expired. The statistical records may be placed in statistical table in a database and/or a cache of an application server. The disclosed strategy may also increase attack resistance of the system.

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Hangzhou, China

Lin Zhao