METHOD AND SYSTEM FOR CONTROLLING QUALITY OF SERVICE OF STORAGE SYSTEM, AND STORAGE SYSTEM

摘要

The present invention provides a method and a system for controlling quality of service of a storage system, and a storage system. The method includes: collecting statistics about processing capability information about hard disks in the storage system and obtaining processing capabilities of the hard disks according to the processing capability information; dividing a cache into multiple tiers according to the processing capabilities of the hard disks; and writing, for a cache of a tier in which dirty data reaches a preset proportion, data in the cache of the tier into a hard disk corresponding to the cache of the tier. The present invention avoids a phenomenon of preempting page resources in the cache.