Abstract: China Unicom, the largest WCDMA 3G operator in China, meets the requirements of the historical Mobile
Internet Explosion, or the surging of Mobile Internet Traffic from mobile terminals. According to the internal statistics
of China Unicom, mobile user traffic has increased rapidly with a Compound Annual Growth Rate (CAGR) of 135%.
Currently China Unicom monthly stores more than 2 trillion records, data volume is over 525 TB, and the highest
data volume has reached a peak of 5 PB. Since October 2009, China Unicom has been developing a home-brewed
big data storage and analysis platform based on the open source Hadoop Distributed File System (HDFS) as it has
a long-term strategy to make full use of this Big Data. All Mobile Internet Traffic is well served using this big data
platform. Currently, the writing speed has reached 1390000 records per second, and the record retrieval time in
the table that contains trillions of records is less than 100 ms. To take advantage of this opportunity to be a Big
Data Operator, China Unicom has developed new functions and has multiple innovations to solve space and time
constraint challenges presented in data processing. In this paper, we will introduce our big data platform in detail.
Based on this big data platform, China Unicom is building an industry ecosystem based on Mobile Internet Big
Data, and considers that a telecom operator centric ecosystem can be formed that is critical to reach prosperity in
the modern communications business.