| ### Upgrading the Directory Version on the Cell Root Directory Upgrading the directory version on the cell root directory has special significance. This procedure implies that all CDS servers in the cell have been upgraded to the latest version, given that a cell root directory is replicated in all CDS servers in the cell. After you have set the CDS_UpgradeTo attribute on the cell root directory, the server software soon recognizes this and sets the CDS_UpgradeTo attribute on all directories in the cell. Eventually, the CDS_DirectoryVersion attribute on all the affected directories in the cell will be upgraded to the new value. ###