Professor Smith needs to setup a RAID system to help analyze

Professor Smith needs to setup a RAID system to help analyze 180TB of data. The data is already sorted on a set of files, and must be loaded into a MySQL database for easy and fast querying. Professor Smith has purchased a RAID system with 160 disks with a total capacity of 320TB. You have been hired as a consultant to advise him. Which RAID organization should be used? Why?

Solution

A non-redundant disk array, or RAID level zero, has very cheap price of any RAID organization as a result of it doesn\'t use redundancy the least bit. This theme offers the most effective performance since it ne\'er must update redundant info. astonishingly, it doesn\'t have the most effective performance. Redundancy schemes that duplicate information, like mirroring, will perform higher on reads by by selection programming requests on the disk with the shortest expected request and movement delays. Without, redundancy, any single disk failure can lead to data-loss. Non-redundant disk arrays ar wide utilized in super-computing environments wherever performance and capability, instead of dependability, ar the first issues.
The traditional resolution, referred to as mirroring or shadowing, uses doubly as several disks as a non-redundant disk array. whenever information is written to a disk identical information is additionally written to a redundant disk, in order that there ar forever 2 copies of the knowledge. once information is browse, it is retrieved from the disk with the shorter queuing, request and movement delays. If a disk fails, the opposite copy is employed to service requests. Mirroring is often utilized in information applications wherever handiness and dealings time ar additional necessary than storage potency.