Data corruption is the damage of data because of various software or hardware failures. The moment a file gets damaged, 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 unpack, etc. Silent data corruption is the process of info getting damaged without any acknowledgement by the system or an admin, that makes it a serious problem for hosting servers as fails are more likely to occur on larger in size hard disks where considerable volumes of info are kept. In case a drive is a part of a RAID and the data on it is replicated on other drives for redundancy, it's very likely that the damaged file will be treated as a good one and will be duplicated on all the drives, making the harm permanent. A huge number of the file systems which run on web servers nowadays often are not able to discover corrupted files immediately or they need time-consuming system checks during which the server isn't working.
No Data Corruption & Data Integrity in Shared Web Hosting
We've dealt with the matter of silent data corruption on all our shared web hosting
servers by using the hi-tech Z file system, or ZFS. The latter is superior to other file systems since it is the only one out there that checks all files instantly by using a checksum - a digital identifier that is unique for each and every file. When you upload content to your account, it will be stored on several SSD drives and regularly synchronized between them for redundancy. ZFS regularly compares the checksum of all files and if any file is detected as corrupted, it is replaced immediately with a good copy from another disk. As this happens in real time, there is no risk that a corrupted file may remain or may be duplicated on the other SSDs. ZFS requires lots of physical memory to execute the real-time checks and the benefit of our cloud hosting platform is that we work with multiple very powerful servers working together. In case you host your websites with us, your info will be undamaged no matter what.
No Data Corruption & Data Integrity in Semi-dedicated Hosting
In case you purchase one of our semi-dedicated hosting
plans, you will not have to worry about silent file corruption since we use ZFS - an advanced file system which keeps track of all files in real time. Every time you upload a file to your website hosting account, ZFS will assign a unique digital fingerprint to it - the so-called checksum. That file will be synced between several SSD drives for redundancy, so if one drive fails, the other ones will take over. ZFS compares the checksum of all the copies on the different drives and when it detects a damaged copy, it replaces it with a healthy one from a different drive. This is done immediately, so there will be no risk for any part of your content at any time. In contrast, other file systems perform checks only after a system failure, but since they don't use anything similar to the checksums that ZFS uses, they will not detect silently corrupted files, so a corrupted copy could be replicated on the remaining drives as well and you could lose crucial info. Since this isn't the case with ZFS, we can guarantee the integrity of every single file you upload no matter what.