Study of web-based management for EAST MDSplus data system

A large distributed data acquisition system based on PXI/PXIe technology has been implemented on EAST tokamak. Now the whole data system has more than 60 data acquisition units and more than 3000 raw channels, and the maximum data throughput is about 5GBytes/s. Most of the acquired data are continuously stored into MDSplus Wan et al. database, moreover the calculated and analyzed data are also saved into MDSplus. In case of long-term discharge mode, the raw data of one shot is more than 1TBytes, and the total data of one campaign is more than 100TBytes.