Data cache system and data inquiry method

Abstract

The invention relates to a cache technology, and provides a data cache system and a data inquiry method aiming to the defects that the traditional Memcached system does not support multiple indexes and the like. The data cache system comprises a virtual storage module, a forwarding module and a hash searching module, wherein the virtual storage module is arranged in a shared memory; the forwarding module is used for receiving a search request and judging the type to which the forwarding module belongs, and forwarding the search request; and the hash searching module is used for receiving the search request of a single-value search type and extracting a keyword, searching corresponding index information from a metadata table according to the type of the keyword, searching a corresponding hash index chain table from an index domain according to the index information, searching a matched index from a sub chain table according to a hash calculation result and searching a matched data record according to the index. The invention also provides a data inquiry method. The technical scheme provided by the invention supports multiple indexes, the data record is stored in a memory sharing mode, and the defect of the traditional Memcached system is overcome.

Description

technical field [0001] The present invention relates to cache technology, more specifically, to a data cache system and a data query method. Background technique [0002] In order to reduce the access pressure of the database server, most database servers are equipped with a data cache system. The function of this data caching system is to temporarily store data frequently accessed by users. In this way, when the user accesses the temporarily stored data again, the data can be directly returned without obtaining the data from the database server, thereby reducing the load on the database server. [0003] Currently, the most commonly used network data caching system is the Memcached system. The Memcached system is a distributed memory cache system, which adopts a Client / Server (client / server) structure and communicates based on sockets. The Memcached system uses the key (key) and value (value) method to cache data. There is no concept of logical table, and all data share t...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a data cache system and a data query method for defects such as that the existing Memcached system does not support multiple indexes

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