Storage Performance Virtualization Under Out-of-Band Structure
This paper addresses an out-of-band storage performance virtualization system named SuperStore, which employs an adaptive method based on feedback control. SuperStore can swiftly adjust its control policy when the disk load changes. When hosts are contending for a single disk, SuperStore can remarkably improve the disk performance. Experiments show that SuperStore imposes only neglectable extra cost with the ratio about 6‰, and that when two hosts contend for one disk with sequential 4k size writing data flow, SuperStore can keep bandwidth nine times as much as those common out-of-band virtualization systems.