The process of files being damaged caused by some hardware or software failure is known as data corruption and this is among the main problems that web hosting companies face as the larger a hard drive is and the more data is stored on it, the more likely it is for data to become corrupted. There're various fail-safes, yet often the info becomes damaged silently, so neither the file system, nor the administrators detect a thing. Because of this, a damaged file will be handled as a good one and if the hard drive is a part of a RAID, that file will be copied on all other drives. In theory, this is for redundancy, but in practice the damage will get even worse. Once a given file gets damaged, it will be partially or fully unreadable, so a text file will not be readable, an image file will present a random blend of colors if it opens at all and an archive shall be impossible to unpack, and you risk sacrificing your website content. Although the most commonly used server file systems feature various checks, they are likely to fail to detect some problem early enough or require a long amount of time in order to check all files and the web server will not be functional in the meantime.
No Data Corruption & Data Integrity in Cloud Hosting
We have resolved the problem of silent data corruption on all of our cloud hosting
servers by using the modern Z file system, or ZFS. The latter is better than other file systems because it is the only one in existence which checks all of the files immediately by employing a checksum - a digital identifier which is unique for each and every file. When you upload content to your account, it'll be stored on several SSD drives and constantly synced between them for redundancy. ZFS constantly compares the checksum of all files and in the event that any file is detected as corrupted, it is replaced immediately with a good copy from another disk. As this happens in real time, there's no risk that a damaged file may remain or may be duplicated on the remaining SSDs. ZFS requires lots of physical memory in order to execute the real-time checks and the advantage of our cloud web hosting platform is that we employ multiple very powerful servers working together. If you host your sites with us, your information will be undamaged no matter what.
No Data Corruption & Data Integrity in Semi-dedicated Hosting
We've avoided any probability of files getting damaged silently as the servers where your semi-dedicated hosting
account will be created employ a powerful file system called ZFS. Its key advantage over alternative file systems is that it uses a unique checksum for every single file - a digital fingerprint that's checked in real time. Since we save all content on multiple SSD drives, ZFS checks whether the fingerprint of a file on one drive corresponds to the one on the remaining drives and the one it has stored. When there's a mismatch, the damaged copy is replaced with a healthy one from one of the other drives and considering that this happens right away, there's no chance that a corrupted copy can remain on our web servers or that it can be duplicated to the other drives in the RAID. None of the other file systems include this kind of checks and what's more, even during a file system check right after an unexpected electrical power failure, none of them can identify silently corrupted files. In comparison, ZFS won't crash after a power failure and the regular checksum monitoring makes a time-consuming file system check obsolete.