Size-based Data Placement Strategy in SAN

Abstract

This paper introduced an even data distribution strategy in SAN. Even data distribution is always the target of distributed storage design. Many articles dedicate the purpose. We use size-based data placement here to guarantee the data distributed evenly at furthest. Size-based data distribution separates the SAN into zones, and each zone has some storage devices (SD), different sized data will fill into different zones. Two kind of allocating algorithms are used to keep the data distribute evenly: orderly and best fit first. Our design will achieve 1) the data will even distributed on each storage devices at furthest; 2) read and write requests will even access the SDs, and 3) bandwidth can be improved at our system. Experimental results showed our design can optimize data distribution