Index read-write method based on compression merging and asynchronization updating
A reading and writing method and indexing technology, applied in special data processing applications, instruments, electronic digital data processing, etc., can solve the problems of poor performance, many times of writing to disk, less data, etc., to reduce the number of disk IO and time-consuming , the effect of increasing the number of comparisons
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[0032] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.
[0033] Assuming that the number of records in the index is 1 billion, the index database divides the index into 470,329 storage areas by 470,329. When the number of index records in the memory reaches 5 million, a batch write operation is initiated. Assuming that all index cache files exclude incomplete index cache files and the total number of index cache files being written reaches n, the condition is considered to be satisfied and an asynchronous update can be initiated. Operation, in this embodiment, n=3. Compression and decompression use the fast compression algorithm snappy.
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