Backup Server

Backup Server

Although the procedure of backup creation is quite simple, it can as well become a headache if it is not carried out regularly. Many businesses directly depend on manipulations with information, which is stored on their servers. Databases, source code repositories, web projects etc. All of those should be saved to backup media on daily basis.

In case the information is lost and cannot be recovered, a company may suffer a considerable damage.

Let’s examine two easiest schemes of creating backup copies.

1. Data copying from product server to backup server, where product server is a working server, which runs some services for users, and backup server is a server where product server data gets copied to. The sole purpose of such server is to store data copied from other servers. Typically it doesn’t provide any other services.

The main requirement for backup server is extensive disk space. Disk drives’ transfer rates are usually of no significance, since access occurs not too often: just at times when backup is written to disks and when backup is read upon relevant occasions.

The downside of this solution is the necessity to set up a dedicated server for backups. This obviously leads to additional expenses. However, smaller organizations usually tend to spend as less as possible on purchasing accessory equipment.

2. Data cross-copying is a method of backup creation such that two or more product servers copy their data to each other. This method is applicable if both product servers have sufficient disk space for storage of data from other servers. In such configuration product servers will act as backup servers to each other.

Data storage systems
Methods of organizing backups listed above are appropriate when it is a relatively small amount of data in question, within the range of a few hundred gigabytes. Otherwise, it is reasonable to consider a variant of DSS (data storage systems) application:

  • Disk arrays - actually similar to backup servers, specially designed for data storage. Such arrays consist of multiple spacious HDDs.
  • Tape drives (also known as streamers) - just like with tape libraries, data is written to special cartridges (magnet tapes encapsulated in plastic box).
  • Tape libraries - intended for automated backup creation. Simultaneous operation of several taping devices increases the library’s performance and reduces the time needed to carry out read and write operations on backups.

It is also worth mentioning that online cloud backup services are attracting a steadily increasing demand these days. Such services are based on using remote backup servers operated by third party providers via the Internet. Particularly, more and more companies rely on a virtual private server (VPS), which combines functionality of both product server and backup server in one package. Such solution is fail-safe to a greater extent and is more economically reasonable, since it eliminates expenses connected with purchasing and upgrading the hardware, while providing an extra advantage, namely an opportunity to access the data from any point in the world.