Enhanced 3-Tier Storage Management Scheme For Flash Memory-Based Solid State Disk
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Date
2017-06
Authors
Alsalibi, Ahmed I. N.
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
Nowadays, significant attention has been paid to the flash memory-based Solid
State Disk (SSD). Different from traditional disks, SSD uses semiconductor chips for
storing the data. This structure enjoys original technical characteristics including low
power consumption, shock resistance and high performance in random access. Owing
to these features, many devices are using flash memory as a basic storage component,
such as mp3, smartphones, and tablet devices. However, the flash memory, basic unit
of SSD, has many distinctive characteristics, which lead to multifarious challenges for
example, writing data (storing data) is only allowed on empty storage unit (block),
which makes it more time-consuming. Moreover, each block has limited number of
erase cycles. In this research, two novel schemes are proposed. The first one is called
Clustering-based Garbage Collection (CGC) aimed at increasing the reliability and performance
of SSD. Whereas, the second one is called Three-tier Flash Memory-based
Storage Management scheme (TM) for hybrid SSD (i.e. SSD consisting of different
types of flash memory) in order to increase the performance, reliability, density, and
reduce power consumption. The eligibility of the CGC and TM schemes are proven by
using DiskSim simulator. The results reveal that the proposed schemes are very competitive
to state-of-the-art schemes in various real-workloads. In terms of reliability,
the percentage of enhancement is in the favor of CGC over the other schemes amounts
to 86.56 %. In terms of performance, the percentage of enhancement is in the favor of
TM over the other schemes amounts to 185.55 % .
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Keywords
Significant attention has been paid to the , flash memory-based Solid State Disk