Abstract: This paper focuses on I/O optimizations of N-hybrid
(New-Form of hybrid), which provides a hybrid file system space
constructed on SSD and HDD. Although the promising potentials of
SSD, such as the absence of mechanical moving overhead and high
random I/O throughput, have drawn a lot of attentions from IT
enterprises, its high ratio of cost/capacity makes it less desirable to
build a large-scale data storage subsystem composed of only SSDs. In
this paper, we present N-hybrid that attempts to integrate the strengths
of SSD and HDD, to offer a single, large hybrid file system space.
Several experiments were conducted to verify the performance of
N-hybrid.