Question

What does RAID stand for and what are some commonly used RAID levels? Discuss these as they relate to a DBMS and provide your recommendations.

Answer 1

RAID stands for Reduntant Array of independent disk which permits to preserve the similar data redundatly to upgrade the total prerfomance .with the assistance of this RAID Levels data is mirrored in mulitple disks in similar array,hence if one disks damages, the data is preserved.A common RAID utilizes the multuiple disks which seems to be a one device hence it is able to offer much storage capacity when compares to single disk.

Discrete controllers enhance discrete levels of RAID.The most famous RAID Levels are as below.

1.RAID 0: It is utilize to improve the server's perfomance.adddtionally called as disk striping.data is written over many disks is possible through the RAID 0 Level.software and hardware enhance this level.if a single disk fails ,then it influences the total array hence there is a possibility of data loss.

2.RAID 1: It is a fault tolerance layout called disk mirroring.the data is copied continously and concurrently from disk to disk establishing a replica.it is executed through a sofware or hardware.it is a easy procedure and to tackle fault tolerance and proportionally less price.

3.RAID 5: It offers good perfomance when compared to mirroring and also fault tolerance.it permits many NAS and server drives as hot swappable.it is one of extremely famous applications of RAID.

4.RAID 6: it is often utilized in enterprises.Also similar as RAID 5 but huige robot solution since it utilizes extra parity block when compared to RAID 5.