In current training trade, online training has become more and more popular, especially in Shanghai Pudong Software Park, many IT companies want to train their employee by online mode. Therefore the skill training center of Shanghai Pudong Soft- ware Park developed an online training system. In order to satisfy the high volume of the request, the DB Service System of this sys- tem uses the MyCAT component to store the data in splitted DB. And in order to improve the efficiency, the DB Service System uses the Redis sentinel cluster to cache the data. After the release, the system works well, and provides the solid support for the online training system.