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 Data Protection Software: Options Page: Versioning Tab
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The Versioning page is used to configure how much historical and deleted data is retained. It also determines whether or not files that were previously backed up (but are now excluded) are automatically destroyed.
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The settings here can be overridden for a particular folder, file type, or file on the Folders page.

·      Limit Number of Versions to Store:
If this is checked, then Data Protection Software will automatically destroy older historical versions that should not longer be retained. If this is unchecked, then all historical versions will be kept forever.

·      Number of Days to Keep Historical Versions:
This indicates that all historical versions generated within the last N days should be retained. For example, if this set to 365 and a file changed once per week, it would retain no more than 52 historical versions of that file. Normally this setting is the only setting that needs to be adjusted in this section.

·      Minimum Number of Versions to Keep:
This indicates that this number of historical versions for each file should always be retained even if the historical version is older than what the Number of Days to Keep Historical Versions allows for. For example, if you were keeping 365 days of versions, and a file changed twice per year, then normally there would be only 2 historical versions retained for that file. If you wanted to ensure that no matter what there were always at least 4 historical versions retained for any file, then you would set this setting to be 5 (4 historical versions + the current version). This is an advanced setting and typically does not need to be changed.

·      Maximum Number of Versions to Keep:
This setting overrides the previous two settings. It indicates that for each file there should never be no more than N versions of the file (including the current version). If this is set to -1 (the default), then when to destroy old versions of a file is determined solely by the Number of Days to Keep Historical Versions setting.

Caution: If this setting is not -1, then it may not be possible to restore some files to a point in time in the past, even if that point in time is more recent than the point in time window dictated by the Number of Days to Keep Historical Versions setting. This is because historical versions of a file may be destroyed sooner than they would otherwise be because the file is changing too frequently and thus exceeds the maximum number of allowed versions before it exceeds the time limit imposed by the Number of Days to Keep Historical Versions setting.

This is an advanced setting and typically should be left at -1. It is normally only used on folders that contain data that changes on a regular basis, for example a folder where all files in the folder change once per day, etc.

·      Destroy Deleted Files:
This indicates how often the software should check for deleted files that are too old (according to the setting below) and should be permanently removed from the backup. We recommend leaving this set to Weekly.

·      Number of Days to Keep Deleted Files:
This is how long files that are backed up and then deleted off of your local computer should be retained for. The software will automatically synchronize this setting with the Number of Days to Keep Historical Versions setting. Keeping this setting synchronized ensures that you can do a true point-in-time restore and restore to any point N days in the past (where N is the value of both of these settings), because files that were deleted less than N days ago are still able to be restored at the point in time more than N days ago. Only change this setting manually if you are sure you want to retain deleted files for a shorter period of time.

Typically you only change this setting for specific folders by editing the properties for a specific folder on the Folders page.

·      Destroy Excluded Files:
Indicates whether or not files that were previously backed up but are now excluded from the backup (because of a rule in the backup policy) should automatically be destroyed on the remote server. Turn this setting on if you want to automatically remove from the backup any data that is shown in red on the Visualize! dialog. We recommend using Visualize! to double-check your backup policies before turning this on.