Data filtering method and device and cache information recording method and device

The embodiment of the invention relates to the field of data processing, and discloses a data filtering method, a cache information recording method and a related device. In a part of embodiments of the invention, the data filtering method is applied to a cache server, a first matrix is arranged in the cache server, the numerical value of an element, corresponding to cache information of the cacheserver, in the first matrix is a preset value. The method comprises the following steps: obtaining a failure instruction, Wherein the failure instruction indicates to delete the first cache information; Determining an element corresponding to the first cache information in the first matrix according to a corresponding relation between the cache information and the elements in the first matrix; And determining whether to execute a failure instruction according to the numerical value of the element corresponding to the first cache information in the first matrix. In the implementation, the frequency of executing the failure instruction indicating to delete the cache information which is not stored by the cache server by the cache server can be reduced, and the pressure of processing the failure instruction by the cache server is reduced.