Yi Liu (刘轶) is the committer and PMC member of Apache Hadoop for years, currently he is lead architect for Paid IM (Internet Marketing) in ebay, he leads the architecture design for Ads, marketing data and experimentation platform. He leads to use Hadoop, Spark, Kafka, Cassandra and other open source projects to build these platforms. Before joining ebay, he worked in Intel for 6 years as architect for Bigdata infrastructure, he led Hadoop open source contributions and optimizations for projects of Hadoop ecosystem based on Intel platform, he also led some large scale machine learning projects/optimizations based on Spark. He has 9 years working experience on computer science.