Improving RAID-5 performance by reducing data redistribution time
نویسندگان
چکیده
RAID is a storing technology that is very often used in nowadays systems and in general this storing volume provides more data security, availability and performance to the existing system. Being an important component of the system, the data storage volume and its performance affect directly the performance of the entire system. This is the motivation why it is convenient for us to improve as much as it is possible the weaknesses of the RAID volume. We are focused on data redistribution problem which is necessary to be performed after adding disks to the volume. In this paper we will review some algorithms and in particular we will discuss FastScale approach, which resulted in satisfactory values of data redistribution time when it was applied on RAID-0. Our proposal is a short algorithm that interacts with FastScale and adjusts it for RAID-5 volumes. The main structure of FastScale is not changed and this gives us reason to anticipate lower redistribution time and higher performance in RAID-5 volumes, as happens in RAID-0.
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