HP RMS Journaling for OpenVMS

This Software Product Description (SPD) details HP RMS Journaling for OpenVMS, which is designed to ensure data integrity for OpenVMS RMS files. The product supports three primary journaling methods: After-image (AI) for redoing modifications and recovery, Before-image (BI) for undoing modifications and restoring previous file states, and Recovery Unit (RU) for ensuring transaction atomicity in conjunction with DECdtm services. The document covers product features, file organization support, requirements for hardware and software environments, and guidelines for recovery and maintenance operations. It also outlines the necessary steps for marking files for journaling, backup procedures, and limitations regarding system failures.