Redundant Array of Independent Disks, or RAID, is a method of keeping content on a number of hard disk drives concurrently. A RAID could be software or hardware based on the drives that are used - physical or logical ones, yet what is common between them is that they all perform as a single unit where data is kept. The key advantage of employing a RAID is redundancy as the information on all of the drives is exactly the same all of the time, so even if one of the drives fails for some reason, the information will still be present on the remaining drives. The overall performance is also better because the reading and writing processes can be split between various drives, so a single one can't be overloaded. There are different sorts of RAIDs where the functionality and fault tolerance could differ based on the specific setup - whether information is written on all the drives in real time or it is written on a single drive and after that mirrored on another, what amount of drives are used for the RAID, and many others.
RAID in Shared Website Hosting
The SSD drives that our cutting-edge cloud web hosting platform uses for storage function in RAID-Z. This sort 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 specific drive where information kept on the other drives is cloned with an extra bit added to it. In the event that one of the disks stops working, your websites will continue working from the other ones and once we replace the bad one, the info that will be cloned on it will be rebuilt from what is stored on the remaining drives along with the info from the parity disk. This is performed so as to be able to recalculate the bits of every single file adequately and to validate the integrity of the data cloned on the new drive. This is another level of security for the content which you upload to your shared website hosting
account in addition to the ZFS file system that compares a unique digital fingerprint for every single file on all of the disk drives in real time.
RAID in Semi-dedicated Hosting
The RAID type which we employ for the cloud hosting platform where your semi-dedicated hosting
account will be created is called RAID-Z. What is different about it is that at least 1 of the disks is employed as a parity drive. Simply put, whenever any kind of data is cloned on this specific hard drive, one more bit is added to it and in case a malfunctioning disk is changed, the info that will be cloned on it is a mix of the data on the remaining hard disks in the RAID and that on the parity one. This is done to make sure that your data is intact. During this process, your sites will be working normally since RAID-Z makes it possible for an entire drive to fail without any service interruptions and it simply works by using one of the remaining ones as the main production drive. Employing RAID-Z together with the ZFS file system which uses checksums to ensure that no data can get silently corrupted on our servers, you won't need to worry about the integrity of your files.
RAID in VPS Web Hosting
All virtual private server
accounts that our company offers are made on physical servers which take advantage of SSD drives working in RAID. At least 1 drive is employed for parity - one extra bit is included in the data copied on it and in case a main disk fails, this bit makes it much simpler to recalculate the bits of the files on the failed hard disk so that the correct info is restored on the new drive added to the RAID. At the same time, your Internet sites will still be online as all the info will still load from at least 1 more hard disk. In the event that you add regular backups to your VPS plan, a copy of your data will be kept on standard disk drives that also function in RAID as we want to make certain that any type of website content you add will be safe and sound at all times. Working with multiple drives in RAID for all main and backup servers allows us to offer fast and reliable web hosting service.