Persistence Layer (SAP Library - Administration Guide)

Persistence Layer

The persistence layer groups the data repositories used by the Portal Server. These are:

repository database: A relational database. The iViewServer and Page Builder both use this database to store iView data, user personalization information, page structures, iPanel definitions, data source definitions, and other portal elements that need to ‘persist’.

Portal Content Directory (PCD): A file system storing roles and role components, and page-to-role relationships. It also stores deployable (PAR) and master iViews (written in Java) with their personalization data and derivations (Java iViews, External Services). The PCD stores a copy of the page catalog.

corporate LDAP directory: User and role data is stored in an existing, LDAP-enabled (lightweight directory access protocol) directory. In most customer system landscapes a central directory service is already in place and contains user and group data. Any user that has an account in the corporate LDAP directory can log on to the portal. For details, see User Management Data Repositories.

portal LDAP directory: A dedicated portal directory server that stores user-role assignments, user mapping data, and custom data. The portal LDAP directory can either store its data in a branch of the corporate LDAP directory, or on a separate directory server. For details, see User Management Data Repositories.