Data corruption is the damage of data caused by various software or hardware fails. Once a file gets corrupted, it will no longer work correctly, so an app will not start or shall give errors, a text file shall be partially or completely unreadable, an archive file will be impossible to open and then unpack, etc. Silent data corruption is the process of data getting damaged without any acknowledgement by the system or an admin, which makes it a significant problem for web hosting servers as problems are more likely to happen on larger in size hard disks where significant volumes of info are placed. When a drive is part of a RAID and the data on it is duplicated on other drives for redundancy, it's more than likely that the damaged file will be treated as a healthy one and it'll be duplicated on all drives, making the harm permanent. A lot of the file systems that operate on web servers today often are unable to identify corrupted files instantly or they need time-consuming system checks during which the server is not functioning.
No Data Corruption & Data Integrity in Shared Hosting
We have resolved the matter of silent data corruption on all our shared hosting
servers by using the state-of-the-art Z file system, or ZFS. The latter is superior to other file systems because it is the only one on the market that checks all files immediately by employing a checksum - a digital identifier that is unique for each file. When you upload content to your account, it will be stored on several SSD drives and continually synchronized between them for redundancy. ZFS regularly compares the checksum of all files and if any file is detected as damaged, it is replaced quickly with a good copy from another disk. As this happens in real time, there's no risk that a bad file may remain or may be copied on the rest of the SSDs. ZFS needs plenty of physical memory in order to perform the real-time checks and the benefit of our cloud hosting platform is that we use multiple powerful servers working together. If you host your Internet sites with us, your information will be intact no matter what.