Authors:
Shinichi Hayashi
1
and
Norihisa Komoda
2
Affiliations:
1
Hitachi and Ltd., Japan
;
2
Osaka University, Japan
Keyword(s):
Data Location Optimization, Tired Storage, Dynamic Tier Control, I/O Performance, SSD.
Related
Ontology
Subjects/Areas/Topics:
Databases and Information Systems Integration
;
Enterprise Information Systems
;
Enterprise Resource Planning
;
Enterprise Software Technologies
;
Performance Evaluation and Benchmarking
;
Simulation and Modeling
;
Simulation Tools and Platforms
;
Software Engineering
Abstract:
We propose a new method for tiered storage and evaluate the characteristics of the method. In this method, a fast tier is divided into two areas, and the data in each area is managed on the basis of two input/output (I/O) measurement periods. When I/Os to these areas increase, the proposed method allocates frequently accessed areas to a higher tier in advance, therefore, improving the total system I/O performance. When frequently accessed areas rarely move, the proposed method is the most effective and improves the total system I/O performance by up to 30.4%.