VAX CDD/Plus

This document serves as the release notes for VAX CDD/Plus Version 4.1, incorporating information from Version 4.0. Published in May 1989, it is intended for data administrators, system managers, programming supervisors, and programmers.

The manual outlines new features and bug fixes in Version 4.1, including:

• Performance Enhancements: Improved memory management, leading to significantly fewer page faults for Rdb/VMS INTEGRATE operations.
• Security Enhancements: Introduction of the CDD$SYSTEM rights identifier and support for Access Control Lists (ACLs) on directories, restricting file access to dictionary code. Privileged images (CDDV.EXE) are used for secure access.
• New Commands: Addition of ENTER and REMOVE commands to manage additional directory entries for existing dictionary definitions.
• VERIFY Command Enhancement: A new /COMPRESS option is available to shrink snapshot files, requiring exclusive database access and system privileges.
• Remote Dictionaries: Improvements in terminating remote processes during network errors and guidelines for using logical names and proxy accounts for remote access.
• Bug Fixes: Resolution of various issues, including dictionary corruption, incorrect handling of the MISSING clause in VALID IF, improved syntax error reporting in CDO, correct conversion of scale for missing/initial values in CONVERT, fixes for infinite loops on syntax errors, and improvements to the DEFINE RMS_DATABASE command.

The document also provides important notes regarding the installation procedure, such as system and process quotas, upgrading protocols, handling concealed device name errors, installing known images with SYSPRV, and resolving installation failures on older DATATRIEVE sites. It highlights that CDD$COMPATIBILITY and CDD$TEMPLATE logical names cannot reside on SYS$COMMON for DESKTOP-VMS.

Known problems and restrictions are detailed across CDD/Plus utilities (CDO, DMU, CDDL) and when using Rdb/VMS. These include limitations in CDO commands (e.g., ENTER with FROM GENERIC, DATATRIEVE SHOW for CDO definitions), restrictions in the CONVERT command (e.g., ACLs not converted, specific DMU field attributes), and issues with the CDO editor (e.g., not displaying entities without processing names, handling expressions/arrays). For Rdb/VMS, problems like inconsistent metadata after rolled-back transactions and limitations in DEFINE RELATION FROM PATHNAME are mentioned.

Finally, the release notes offer hints for effective CDD/Plus usage, covering compatibility between versions, assigning resource identifiers (CDD_USER) to prevent disk quota errors, strategies for avoiding locking problems, and guidelines for using RMU/BACKUP and RMU/RESTORE on CDO dictionaries. A section on documentation additions and corrections updates users on online help, manual errors, and new syntax for various commands and call interface routines (CDD$CHANGE_DIRECTORY, CDD$DELETE_DIRECTORY, CDD$ERASE_DIRECTORY_ENTRY, CDD$GET_ELEMENT). The document concludes with guidelines for submitting Software Performance Reports (SPRs).