To reduce the performance loss of the login module caused by the network delay running on cloud database.,we use the filter which base on Bloom filter to judge if each data have been load in database or not to reduce the number of database read so that the performance loss caused by the network delay can be reduced.Bloom filter is managed by Redis distributed version which can promise high availability.Experiment results show that when the total query proportion of missing Sql query is more than 0.5%in the ...