Data Corruption

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Data corruption is the unintended transformation of a file or the loss of information which usually occurs during reading or writing. The reason can be hardware or software failure, and for that reason, a file may become partially or completely corrupted, so it will no longer function as it should since its bits shall be scrambled or lost. An image file, for instance, will no longer display a true image, but a random combination of colors, an archive will be impossible to unpack as its content will be unreadable, and so on. In the event that this kind of a problem occurs and it is not found by the system or by an admin, the data will become corrupted silently and in case this happens on a disk drive which is a part of a RAID array where the data is synchronized between various different drives, the corrupted file will be replicated on all of the other drives and the harm will be permanent. A number of widespread file systems either do not have real-time checks or do not have good ones which will detect an issue before the damage is done, so silent data corruption is a common issue on hosting servers where substantial amounts of information are stored.

No Data Corruption & Data Integrity in Shared Hosting

We have tackled the problem of silent data corruption on our shared hosting servers by using the state-of-the-art Z file system, or ZFS. The latter is superior to other file systems as it is the only one in existence that checks all files instantly by using a checksum - a digital identifier which is unique for each file. When you upload content to your account, it will be stored on several NVMe drives and frequently synced between them for redundancy. ZFS regularly compares the checksum of all files and if any file is detected as corrupted, it's replaced right away with a good copy from some other disk. As this happens in real time, there is no risk that a bad file may remain or may be copied on the other NVMes. ZFS requires lots of physical memory to perform the real-time checks and the benefit of our cloud web hosting platform is that we take advantage of multiple very powerful servers working together. In case you host your Internet sites with us, your data will be undamaged no matter what.

No Data Corruption & Data Integrity in Semi-dedicated Hosting

We've avoided any risk of files getting corrupted silently due to the fact that the servers where your semi-dedicated hosting account will be created use a powerful file system called ZFS. Its key advantage over other file systems is that it uses a unique checksum for each and every file - a digital fingerprint which is checked in real time. As we keep all content on numerous NVMe drives, ZFS checks if the fingerprint of a file on one drive corresponds to the one on the rest of the drives and the one it has stored. In the event that there is a mismatch, the bad copy is replaced with a good one from one of the other drives and because it happens instantly, there is no chance that a corrupted copy could remain on our hosting servers or that it could be copied to the other hard disks in the RAID. None of the other file systems include this kind of checks and what is more, even during a file system check following a sudden blackout, none of them can identify silently corrupted files. In contrast, ZFS does not crash after a power failure and the regular checksum monitoring makes a lenghty file system check obsolete.