Redundant Array of Independent Disks, or RAID, is a method of keeping content on multiple hard drives simultaneously. A RAID can be software or hardware based on the hard drives that are used - physical or logical ones, yet what is common between them is that they all perform as just one single unit where info is saved. The key advantage of employing a RAID is redundancy because the information on all of the drives shall be exactly the same all of the time, so even in case one of the drives fails for some reason, the information will still be available on the remaining drives. The general performance is also better because the reading and writing processes will be split between different drives, so a single one won't be overloaded. There're different sorts of RAIDs where the functionality and fault tolerance may vary depending on the particular setup - whether info is written on all of the drives real-time or it is written on one drive and after that mirrored on another, what amount of drives are used for the RAID, and so on.
RAID in Shared Hosting
Any content that you upload to your new shared hosting account will be saved on fast SSD drives which work in RAID-Z. This setup is built to employ the ZFS file system that runs on our cloud hosting platform and it adds an additional level of protection for your site content in addition to the real-time checksum authentication which ZFS uses to ensure the integrity of the data. With RAID-Z, the data is saved on several disks and at least one is a parity disk - whenever information is written on it, an additional bit is added, so in case any drive fails for some reason, the integrity of the data can be verified by recalculating its bits in accordance with what is stored on the production disks and on the parity one. With RAID-Z, the operation of our system won't be interrupted and it'll continue operating efficiently until the problematic drive is replaced and the information is synced on it.
RAID in Semi-dedicated Hosting
If you host your Internet sites inside a semi-dedicated hosting account from our company, all of the content you upload will be stored on SSD drives which operate in RAID-Z. With this type of RAID, at least 1 of the drives is employed for parity - when data is synced between the drives, an additional bit is added to it on the parity one. The idea behind this is to guarantee the integrity of the information which is duplicated to a brand new drive in the event that one of the disks in the RAID fails as the site content being copied on the brand new disk is recalculated from the info on the standard hard drives and on the parity one. Another advantage of RAID-Z is the fact that even if a hard drive stops working, the system could switch to another one right away without service disruptions of any sort. RAID-Z adds an additional level of safety for the content you upload on our cloud web hosting platform along with the ZFS file system which uses unique checksums in order to authenticate the integrity of each file.
All virtual private server accounts that our company offers are generated on physical servers that employ SSD drives operating in RAID. At least one drive is intended for parity - one additional bit is added to the information copied on it and if a main disk breaks down, this bit makes it easier to recalculate the bits of the files on the damaged hard disk so that the correct information is restored on the new drive added to the RAID. Meanwhile, your Internet sites will remain online because all the data will still load from at least 1 other disk drive. If you add routine backups to your VPS package, a copy of your info will be saved on standard hard disks which also function in RAID because we want to make sure that any type of site content you add will be safe and sound at all times. Employing multiple hard disks in RAID for all main and backup servers allows us to offer fast and reliable Internet hosting service.