Scherzinger, StefanieThor, AndreasSeidl, ThomasRitter, NorbertSchöning, HaraldSattler, Kai-UweHärder, TheoFriedrich, SteffenWingerath, Wolfram2017-06-302017-06-302015978-3-88579-635-0We demonstrate AutoShard, a ready-to-use object mapper for Java applications running against NoSQL data stores. AutoShard's unique feature is its capability to gracefully shard hot spot data objects that are suffering under concurrent writes. By sharding data on the level of the logical schema, scalability bottlenecks due to write contention can be effectively avoided. Using AutoShard, developers can easily employ sharding in their web application by adding minimally intrusive annotations to their code. Our live experiments show the significant impact of sharding on both the write throughput and the execution time.enText/Conference Paper1617-5468