Research on the Data Migration Strategy of Hierarchical Mass Storage System
Xin Liu · Computer Engineering and Science · 2009
Data has to be more and more reliable and system has to be much faster because of the data center computing model,current storage system stores petabytes of data on thousands of disks,high parallelism,high reliability and high Performance-to-price ratio are the kernel demands of mass storage system.In this paper,two tiered mass storage system based on different disks is proposed supply much higher I/O performance and reliability by automatic data migration.Based on HSM,we put forward two tiered storage system model named FC—SAS and SATAII,design a file-level valuation model to classify files in disks exactly,and a data migration process control strategy to supply efficient data migration between two tiered disks which can implement transparent accessing based on affecting the system I/O performance as less as possible.