In recent time, data is exponentially increasing so there is problem in quick search. Time, storage & processing also main issues for big data so optimization can be done by implementing bloom filter in it. Hadoop is a bunch of technology & have capacity to store large amount of data on data nodes. So, various operations are required on data set. Bloom filter technique is probabilistic data model for getting data into array so that no need to travel all data in network. With implementation of this filter mapper can reduce the amount of data travel.