Research And Design Of Mobile Learning System Based On Cloud Storage

Mobile learning, just as its name implies, the learning time and place is no longer fixed. Users can learn anything they are interested through the mobile learning system at any time and any place. Cloud Storage System is a concept of the evolution and the development of Cloud Computing, it means that this system puts plenty of heterogeneous devices together and provides data storage and business access service together for the external by technologies like constellation effect, network technique and DFS(distributed file system). After analyzing the shortcomings of the existing mobile learning system such as lacking resources sharing, high expenses of system building and maintenance, the paper put forwards an idea of mobile learning system based on Cloud Storage, and makes a concise introduce about the research status of the mobile learning system and the cloud storage system all over the world.I (participate or independent) to complete the following work:Firstly, the paper elaborates the cloud storage system about the concept of Cloud Storage, the comparison with traditional storage and the model of Cloud Storage, respectively, and studies the current mainstream cloud storage platform technology from Hadoop technique, HDFS (Hadoop distributed file system) framework and HBase database, and introduces some common techniques about DFS such as storage virtualization and content delivery network. Secondly, the paper analyzes the demand of this mobile learning system based on cloud storage comprehensively, arises the method of system structural design and database design, analyzes the relevant techniques of system realization such as data replication, load balancing and trash collection, designs the functions of this system in detail. Since the essence of the Cloud Storage system is DFS, the consistency of data in this system is necessary. Thus, the paper studies and analyzes the current popular consistency algorithm:Paxos algorithm, and on the basis of this, proposes an improved Paxos algorithm. Through theoretical analysis and simulated analysis, the improved Paxos algorithm can reach consistency protocol faster and has a smaller amount of data transmission.Finally, on the basis of preliminary requirements analysis and technical research, the paper realizes the mobile learning system based on cloud storage preliminarily, finishes the building and configuration of the cloud storage platform, and achieves the design of the interface about the web version mobile learning system.