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Merge pull request #93 from kuro68k/master

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Improved explanation of retention options
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kees-z 2023-02-16 21:29:05 +01:00 committed by GitHub
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docs/03-using-the-graphical-user-interface.md
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@ -186,14 +186,27 @@ An Upload Volume is an encrypted compressed file that contains a part of your ba
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The retention can be set in 3 ways: The retention can be set in 5 ways:
* **Unlimited:** * **Keep all backups:**
Backups will never be deleted. This is the most safe option, but remote storage capacity will keep increasing. Backups will never be deleted. This is the most safe option, but remote storage capacity will keep increasing.
* **Until they are older than:** * **Delete backups that are older than:**
Backups older than a specified number of days, weeks, months or years will be deleted. Backups older than a specified number of days, weeks, months or years will be deleted.
* **A specific number:** * **Keep a specific number of backups:**
The specified number of backup versions will be kept, all older backups will be deleted. The specified number of backup versions will be kept, all older backups will be deleted.
* **Custom backup retention:**
Enter your own settings in the text box that appears.
* **Smart backup retention:**
retains one backup for each of the last 7 days, each of the last 4 weeks, and each of the last 12 months.
Consider the case of Smart Backup Retention. Using Duplicati notation it can be written as '1W:1D,4W:1W,12M:1M'. This results in this behaviour:
**Active files:** Files that exist in the source will continue to be included in at least one backup version. For example, a file that exists in the source but which is 3 years old will still be in at least one backup version, regardless of the rentention policy.
**Deleted files:** When a file is deleted from the source it will not be included in any new backups. Old backup versions will retain a copy of the deleted file for at least 12 months. After 12 months the last backup version to include it will eventually be removed.
**Modified files:** When a file's content changes, previous versions will follow the backup retention policy. In other words, there will be a maximum of one version per day for the last week, one version per week for the last 4 weeks, and one version per month for the last 12 months. A daily version that ages to over a week old will either be retained as that week's version, or deleted.
![](ss_newbackup_10.png) ![](ss_newbackup_10.png)