Let us check the Differential and Incremental type of back up today.

Differential Back Up

Differential back up is another kind of back up where only files that have been modified will be backed up. This is quite useful as most of the information backed up is not a repeat of the earlier backups, which help in reducing backup memory usage. However this is not the Ideal method as files that have seen minor changes also will be backed up fully. This is generally performed on File/Print servers but may not be useful in application servers where multiple changes are made to documents everyday.

Incremental Back-Up

Incremental back ups are the most desired among the back up methods. Incremental Backups are performed on servers using automated agents that can identify portions of very large files that have been modified. Only the modified portions of these files are extracted and are backed up. This results in using minimum memory space for the back up process as only very little content may have to be added. Assuming that the back up of an application server has to be taken every day, backing up huge files for small changes in any of the documents can be expensive and unnecessary. It may be useful for you to know that Lotus Notes Domino is one of those kinds that support Incremental back up.

This is the most economical and effective method of backing up servers and is widely used across the globe more than Full and Differential Back Up.

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Server Back-Ups are the key to any organizations Disaster Recovery plan. It helps the organization to function non stop even at times of crisis without losing the information gathered. In this series of posts you can get an idea about Lotus Notes Back-Up capability and how it can help an organization at times of crisis.

Before going onto the details of Lotus Notes backup, let us understand some basics of Back-Up in general so that it will help us when Notes Backup is discussed.

Backups can be classified into different types based on the content being backed up. They are as follows,
1. Full Backup
2. Differential Backup
3. Incremental Backup

Full Backup

Full backup is one type where the entire server content is backed up. This type of backup is not always desired as it takes a huge amount of space. Also it may not be desired because of the fact that it backs up unwanted content like the server Operating System, etc. resulting in the accumulation of unwanted clutter along with the actual content.