Data corruption is the damage of information caused by various software or hardware problems. After a file is corrupted, it will no longer function properly, so an app will not start or will give errors, a text file will be partially or completely unreadable, an archive file will be impossible to open and unpack, etc. Silent data corruption is the process of information getting harmed without any identification by the system or an admin, that makes it a serious problem for website hosting servers as failures are much more likely to happen on larger hard drives where substantial volumes of info are kept. In case a drive is a part of a RAID and the info on it is copied on other drives for redundancy, it is very likely that the damaged file will be treated as a standard one and it will be copied on all of the drives, making the damage permanent. A huge number of the file systems which run on web servers these days often cannot recognize corrupted files immediately or they need time-consuming system checks during which the server is not working.
No Data Corruption & Data Integrity in Hosting
We have tackled the matter of silent data corruption on all our 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 of the files right away by using a checksum - a digital identifier that's unique for each 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 examines 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 corrupted file may remain or may be copied on the remaining SSDs. ZFS requires lots of physical memory to perform the real-time checks and the advantage of our cloud web hosting platform is that we take advantage of multiple very powerful servers working together. In case you host your websites with us, your info will be intact no matter what.