| OpendTect User Documentation version 4.2 |
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The OpendTect session is generally used to save and to retrieve the specific settings of a scene. This can help user(s) to resume work from previous settings. The session will save all settings of the displayed elements, and that session can be restored at any time. When clicking the Survey option in the tool bar and then click Session, three options appear. It is possible to save the session and restore a saved session. When clicking "Auto", the session will restore itself automatically the next time you start OpendTect.
When a session is saved, the system stores all element positions and relevant information to recreate the images. The content of the elements is not saved but is re-created when the session is restored.
The auto-load window
The user can enable or disable the auto-load session option. It is also possible to choose if one of the save sessions will be used in this session. Finally the user has the choice on whether or not to load the selected session now.
Please note that a similar function exists to auto-load one of the attribute sets.
TIPS: As mentioned earlier that the contents of the elements are not saved but are recreated. It is a common practice of the OpendTect user(s) to save and restore a session. The mistake a user(s) can normally do is to save a sessionwith the contents of an elements (e.g. attributes) that takes a long time in calculation. In this way, when such session is restored, it will take enough time to restore, because the session can only store the settings (or relevant information) but not the on-the-fly attributes. Thus, it re-calculates the contents. This can be avoided by creating the attribute outputs of such attributes. If an attribute already reside in a disk (a session is saved), the session will be restored very quickly. Similarly, the same thing can happen in a session that contains contents of surface data (the attributes calculated along horizon). The attributes applied along a horizon can be saved as a surface data. It is recommended, to save the surface data before saving a session.