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Space Environment Scientific Data Collection and Key Technologies

Author: CaoZhangZhi
Tutor: WangQun
School: Chinese Geology University (Beijing)
Course: Computer Science and Technology
Keywords: Meridian Project Data collection Load Balancing Web Services LDAP FTP
CLC: TP399-C3
Type: Master's thesis
Year: 2010
Downloads: 72
Quote: 0
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Abstract


The subject comes from major national infrastructure projects in the Eastern Hemisphere space environment integrated surveillance meridian chain foundation engineering (referred Meridian Project) data communication system with data collection subsystem, and is the core business of the entire Meridian Project is an important component. Data collection subsystem, including through the network each node stations together Meridian Project monitoring data, and complete the basic information of the data file record, name normalization, raw data storage. According to functional requirements analysis and system architecture design, data collection can be divided into subsystems responsible for the collection and monitoring of data files automatically pooled together clients and compatibility mode FTP client; responsible for user authentication, scheduling pooled server and FTP server and forward network requests and data files central control server; responsible for the collection, validation, data files and dump communicate with other subsystems are responsible for the collection of servers and system administrators to provide file transfer status, the station management information and other management services Client four modules. The topics from the data collection subsystem requirements, design and implement three aspects of starting, highlighting the subsystem functional requirements, structural design, business processes, performance metrics, system implementation and support implementation and operation environment and used in the process some of the key technologies. Together in the face of data center servers and FTP server cluster scheduling problem, server performance requirements, external / internal network data forwarding method, in order to ensure the consistency of user data and its operation, the client (including the collection of client and FTP client end) of the centralized authentication and communication between heterogeneous systems and other issues, using a variety of appropriate load balancing algorithm, the connection pool technology, HTTP, data forwarding method, based on the Lightweight Directory Access Protocol (Lightweight Directory Access Protocol, referred to as LDAP) combined with asymmetric encryption mechanisms (RSA) centralized user authentication technologies, and Web Services technology, NFS file sharing, etc., and according to its own system features gives the current optimal solution and its implementation. Taking into account the data collection subsystem to facilitate future expansion, good maintainability and efficient system upgrades, this is still the system architecture, usability and performance improvements in areas such as a more in-depth research and prospects.

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