Reverse index mixed compression and decompression method based on Hbase database
An inverted index and mixed compression technology, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of unseen application precedent, low decompression efficiency, and low compression ratio, so as to improve decompression efficiency and improve Compression ratio, the effect of improving space utilization
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[0042] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:
[0043] First, the Hbase database is explained: Hbase is a distributed column database built on Hadoop, and its file system follows Hadoop's HDFS (Hadoop File System). A table of Hbase can have multiple column families (Column Family). In physical storage, one column family corresponds to a folder, and the folder can contain several Hfile files. Such as figure 1 with figure 2 As shown, the Hfile file is a variable-length file. Each record in the Data block stores a key / value pair, and the rest mainly stores the corresponding positioning information and index information. Hbase will automatically sort the data in memory by row key based on lexicographical order. When writing a file, all data in the memory area will be written to the file by block at one time, and a data block will be added to the end of the file. Index information. When reading a fi...
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