Method and device for managing memory space

Abstract

The invention discloses a method and device for managing a memory space. The method includes that if stale data in a first memory space reaches a certain threshold, whether valid data exists in the first memory space is judged, and on yes judgment, the valid data arranged at an initial position is taken out from the first memory space until all valid data in the first memory space is taken out; on no judgment, the first memory space is released; Hash operation is conducted on data taken out from the first memory space, a memory address of the data in a second memory space is obtained, and the data is written on the memory address of the second memory space. The method and device can meet a requirement for expanding / reducing caching capacity and can also guarantee that users can access caching data normally during a data migration period. Simultaneously, pressure of a data base or a disc is reduced during a data traffic peak period, and the stability of overall service is improved.

Description

technical field [0001] The invention relates to the technical field of data communication, in particular to a memory space management method and device. 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 cac...

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