Essbase displays a dialog box when you save outline changes that trigger database restructuring (using Outline Editor). In the Restructure Database dialog box, you define how data values are handled during restructure; for example, you can preserve all data, preserve only level 0 or input data, or discard all data during restructure. See “Saving Outlines” in Oracle Essbase Administration Services Online Help.
If the database contains data, you need enough free disk space on the server to create a backup copy of the database. Backup ensures that any abnormal termination during the restructure process does not corrupt the database.
Essbase may display a “Restructuring not required” message yet still perform an index-only restructure. This event most likely will occur if you make changes to a sparse dimension. If you try to cancel a restructure operation, Essbase may issue a “Can’t cancel” message. If such a message is displayed, Essbase is performing final cleanup, and it is too late to cancel.