An Incremental Index Construction Scheme Based on Observer Pattern

In the era of big data, the amount of data in many application fields is growing explosively, so it is urgent to study and find effective big data management methods
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. In the process of information storage and search, the establishment of index is a very key step, which is related to whether we can quickly and efficiently obtain useful parts from massive information
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. This paper proposes an incremental index construction scheme based on observer pattern. The scheme includes three parts: index establishment, file directory monitoring and index update. The scheme combines the observer mode of the design pattern, realizes the decoupling of different steps and functions in index establishment to a certain extent, making the code for index establishment more scientific, easy to maintain and expand.