Method and device for operating cache data

Abstract

The invention discloses a method and device for operating cache data. The method comprises the following steps of judging whether a first internal memory space is empty or not if the first internal memory space is fully filled with data, taking the data, located at a starting position, out of the first internal memory space to be written into a second internal memory space with larger volume if the first internal memory space is not empty, until taking out all data in the first internal memory space; and releasing the first internal memory space if the first internal memory space is empty. The invention also provides a method for transferring the cache data in the first internal memory space into the second internal memory space with small volume as well as a device corresponding to the method. Due to the adoption of the method and the device, not only can the enlarging / reduction requirement of the cache volume be met, but also a user can access the cache data normally during the transferring period of the data; and meanwhile, during the peak flow of the data, the pressure of a database or a magnetic disk can be alleviated, and the integral service stability also can be improved.

Description

technical field [0001] The invention relates to the technical field of data communication, in particular to a method and device for operating cached data. Background technique [0002] At present, many large-scale Internet products and services have increasingly used caching technology. Website technicians usually cache hotspot data accessed by users in memory. When other users access the same data, they can directly read from the memory and return the read data to the user to avoid searching from slow devices such as databases or disks. [0003] Although many cache devices have been widely used, most cache devices need to reapply to the operating system for a larger space of memory when the storage space is insufficient, and at the same time release the old memory area to accommodate the new memory. Migrate or populate data in the space. However, this approach can easily bring certain "bumps" to the upper-layer application, that is, at the time of memory expansion, all c...

AI Technical Summary

Problems solved by technology

However, this approach can easily bring certain "bumps" to the upper-layer application, that is, at the time of memory expansion, all cached data will be invalidated. At this time, all user access must go to the database or disk to find data, which increases the response time of user access, and at the same time makes the disk access pressure instantly too high

Images