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Function “Snapshot definition”
This feature takes so-called snapshots of the file system. The Snapshot function of Open-E iSCSI enables the system administrator to freeze the data content of the targets volume at a period of time, this function is transparent to the user.
From this moment on, the users work on a virtual data volume, all changes to the volume are stored in a different partition. The storage of all changes is independent of the file-system Open-E iSCSi uses on block-level. Only when the snapshot is deleted / removed the changes are permanently transferred to the actual data volume. Through a separate share, which is only available for the administrator, a complete backup of the dataset can be done. With the snapshot technology even a database can be backed up while the users are working on it. Snapshots can be activated / deactivated manually or automatically.
In the schedule options "Begin time" and "End time" and day of week are used for automatic snapshots: this is the time of automatic activation and deactivation (syntax is “him”). When snapshot start is set, the snapshot will be deactivated and activated again at the given time.
Alternatively, snapshots can be taken manually in the Maintenance->Snapshot menu even if snapshots are automatically created under “Snapshot Definition”. The button remove all can by useful for removing all snapshots at one time.
