Data compression is the compacting of data by decreasing the number of bits which are stored or transmitted. Thus, the compressed data needs much less disk space than the initial one, so a lot more content can be stored on identical amount of space. There're different compression algorithms that work in different ways and with a lot of them just the redundant bits are erased, so once the info is uncompressed, there is no decrease in quality. Others remove unneeded bits, but uncompressing the data at a later time will result in lower quality compared to the original. Compressing and uncompressing content requires a huge amount of system resources, in particular CPU processing time, therefore each and every web hosting platform which employs compression in real time needs to have adequate power to support that attribute. An example how data can be compressed is to substitute a binary code such as 111111 with 6x1 i.e. "remembering" what number of sequential 1s or 0s there should be instead of keeping the entire code.
Data Compression in Semi-dedicated Servers
The semi-dedicated server plans which we supply are created on a powerful cloud hosting platform which runs on the ZFS file system. ZFS employs a compression algorithm known as LZ4 that surpasses any other algorithm you will find in terms of speed and compression ratio when it comes to processing web content. This is valid especially when data is uncompressed as LZ4 does that faster than it would be to read uncompressed data from a hard disk and because of this, websites running on a platform where LZ4 is enabled will work quicker. We're able to take full advantage of the feature regardless of the fact that it requires quite a considerable amount of CPU processing time because our platform uses a wide range of powerful servers working together and we do not create accounts on just a single machine like most companies do. There is an additional benefit of using LZ4 - considering the fact that it compresses data very well and does that extremely fast, we can also make multiple daily backups of all accounts without influencing the performance of the servers and keep them for 30 days. By doing this, you can always bring back any content that you delete by accident.