Redundant Array of Independent Disks, or RAID, is a way of saving content on a number of hard disks concurrently. A RAID could be software or hardware based on the HDDs that are used - physical or logical ones, still what is common between them is that they all perform as just one single unit where data is stored. The main advantage of employing a RAID is redundancy as the data on all drives will be identical all the time, so even in case some drive fails for some reason, the data will still be present on the rest of the drives. The overall performance is also better as the reading and writing processes can be split between various drives, so a single one will never be overloaded. There are different sorts of RAIDs where the capabilities and fault tolerance can vary based on the exact setup - whether info is written on all of the drives in real time or it's written on one drive and then mirrored on another, what amount of drives are used for the RAID, etcetera.
RAID in Cloud Web Hosting
The SSD drives that our cutting-edge cloud web hosting platform employs for storage function in RAID-Z. This type of RAID is developed to work with the ZFS file system which runs on the platform and it employs the so-called parity disk - a special drive where information located on the other drives is duplicated with an additional bit added to it. In case one of the disks fails, your Internet sites shall continue working from the other ones and once we replace the faulty one, the data which will be copied on it will be rebuilt from what is stored on the remaining drives together with the information from the parity disk. This is done in order to be able to recalculate the bits of every file adequately and to authenticate the integrity of the info copied on the new drive. This is one more level of security for the info which you upload to your cloud web hosting
account along with the ZFS file system which analyzes a unique digital fingerprint for each and every file on all of the drives in real time.
RAID in Semi-dedicated Servers
The RAID type that we employ for the cloud hosting platform where your semi-dedicated server
account will be created is known as RAID-Z. What's different about it is that at least 1 of the disks is employed as a parity drive. Put simply, whenever any data is duplicated on this special disk drive, one more bit is added to it and in the event that a faulty disk is replaced, the info that will be cloned on it is a combination of the data on the other hard disks in the RAID and that on the parity one. It's done this way to ensure that your information is intact. Throughout this process, your sites will be working normally since RAID-Z enables an entire drive to fail without causing any service disruptions and it simply works by using one of the remaining ones as the main production drive. Using RAID-Z together with the ZFS file system that uses checksums to warrant that no data will get silently corrupted on our servers, you'll never have to worry about the integrity of your files.
RAID in VPS Servers
All VPS server
accounts which our company provides are generated on physical servers that take advantage of SSD drives functioning in RAID. At least 1 drive is intended for parity - one additional bit is added to the data duplicated on it and if a main disk stops working, this bit makes it much easier to recalculate the bits of the files on the damaged disk drive so that the accurate data is recovered on the new drive included in the RAID. In the mean time, your sites will remain online since all the information will still load from at least 1 more drive. In the event that you add routine backups to your VPS package, a copy of the data will be kept on standard disk drives which also work in RAID since we want to make sure that any kind of website content you upload will be protected at all times. Working with multiple hard drives in RAID for all main and backup servers enables us to offer fast and reliable web hosting service.