Data corruption is the damage of info caused by various hardware or software fails. When a file gets corrupted, it will no longer function correctly, so an application will not start or shall give errors, a text file could be partially or fully unreadable, an archive will be impossible to open and unpack, etc. Silent data corruption is the process of info getting harmed without any identification by the system or an admin, which makes it a significant problem for website hosting servers as failures are much more likely to happen on bigger hard disk drives where substantial volumes of information are stored. If a drive is a part of a RAID and the data on it is replicated on other drives for redundancy, it is more than likely that the bad file will be treated as a healthy one and will be duplicated on all the drives, making the damage permanent. Lots of the file systems that operate on web servers nowadays often cannot find corrupted files right away or they need time-consuming system checks through which the server is not operational.
No Data Corruption & Data Integrity in Website Hosting
We have tackled the problem of silent data corruption on all of our website hosting servers by using the leading-edge Z file system, or ZFS. The latter is more advanced than other file systems as it is the only one out there that checks all files in real time by employing a checksum - a digital identifier which is unique for each file. When you upload content to your account, it'll be stored on several SSD drives and continually synchronized between them for redundancy. ZFS regularly examines the checksum of all files and in the event that any file is detected as corrupted, it's replaced instantly with a good copy from some other disk. As this happens in real time, there is no risk that a damaged file may remain or may be duplicated on the rest of the SSDs. ZFS needs lots of physical memory in order to execute the real-time checks and the advantage of our cloud website hosting platform is that we take advantage of multiple very powerful servers working together. If you host your websites with us, your data will be undamaged no matter what.
No Data Corruption & Data Integrity in Semi-dedicated Hosting
If you acquire one of our semi-dedicated hosting plans, you won't need to be concerned about silent data corruption because we use ZFS - an advanced file system which checks all of the files in real time. Whenever you upload a file to your website hosting account, ZFS will assign a unique digital fingerprint to it - the so-called checksum. This file will be synchronized between a couple of SSD drives for redundancy, so if a drive fails, the other ones will take control. ZFS compares the checksum of all the copies on the different drives and when it detects a corrupted copy, it replaces it with a healthy one from a different drive. This happens instantly, so there will be no risk for any part of your content at any moment. By comparison, other file systems execute checks only after a system malfunction, but since they don't use anything similar to the checksums which ZFS uses, they won't detect silently corrupted files, so a corrupted copy may be replicated on the other disks as well and you can lose critical data. As this isn't the case with ZFS, we can guarantee the integrity of every single file you upload no matter what.