RMS Journaling for OpenVMS

This Software Product Description (SPD) details RMS Journaling for OpenVMS (Version 7.3), a layered product for both VAX and Alpha architectures. It outlines three core methods of journaling—After-image (AI), Before-image (BI), and Recovery unit (RU)—to protect data integrity and ensure atomic transactions through DECdtm services. The document covers system requirements, supported file organizations, file maintenance procedures, recovery operations, and interaction with other system utilities like Backup and Volume Shadowing. It also provides information on licensing, warranty, and distribution as a System Integrated Product.