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19.01.2022 Автор: LengMeng

Site backup

A backup is a created copy of all site data so that it can be restored in case of loss or deletion. The importance of regularly copying information should not be underestimated, because everyone has fails that are difficult to influence. In order to avoid large-scale and irreversible losses, develop a habit and follow these rules:

  • Regularity (the ability to restore files is also affected by the frequency of backups)
  • Automation (thanks to this feature, you can ensure that you have an updated and permanent copy of all data)
  • Type of media (meaning that copies should be stored on different servers, an excellent way to secure in case one of the servers is lost)
  • Analysis (immediately after creating a backup, check it for the possibility of recovery so that in a critical case you do not encounter an error)

Backup types differ in many ways, each with its own advantages and disadvantages:

  • Full backup

From the name, we can conclude that this type of backup copies all files from the resource without their further removal. Creating a full backup takes a lot of time, but it is worth noting that it is the most reliable and practical.

What are the benefits?

  • Clear and simple control
  • Fast data recovery
  • Single backup location with all data

Flaws

  • High network load
  • Taking too long to create a backup
  • Takes up a lot of storage space

  Дифференциальное резервное копирование

This species took as its basis a little bit of everything from other varieties, but at the same time added its own characteristics. It is based on a backup of only changed data that is different from the very first committed copy. That is, a full initial backup is considered a key push point for subsequent changes.

Due to the fact that only two parts are used to create a differential backup: a full backup and the last one, this type allows you to restore all data much faster than other types.

Advantages:

  • Average backup time
  • Fairly fast recovery
  • The most reliable way to convert

Flaws:

  • Each subsequent backup takes more time and storage space than the previous one.

 

  • Incremental backup

The incremental type takes a complete copy of the data as a basis, and then copies only the selective blocks that have changed since the last backup job. After a certain configurable period, the information will be updated and a new full copy will be created to repeat the cycle.

One of the main advantages is a small amount of transmitted data, a short period of time and an almost insignificant load on the network.

Advantages:

  • High backup speed
  • Minimum space usage for copy storage
  • Possibility of frequent recoveryНедостатки:
  • Unreliability (since everything depends on the integrity of all blocks in the chain)

Causes of Data Loss

There are various variations when a timely backup can save a business from losing a site. For example, failures in the operation of servers, computers or software breakdowns do not always occur, but people can also be guilty – intruders who could intentionally damage the site.

  • In no case can you store data in a single instance or on a single device. If they want to use your material or simply damage it, then even a powerful antivirus will be powerless. There were even cases when the user himself was guilty of the disappearance of data. All this happens due to inexperience or haste, when fleetingly you can damage an important document or file.

All types of backups have one goal – to protect you and your site from losing important information! Therefore, think about creating backups in advance and take into account all the nuances of development.

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