ClearCase 7迁移至Dimensions 12.2.2.6可行性咨询：能否保留历史与基线信息？

Great question—when moving between version control systems, keeping full historical data and baselines intact is non-negotiable for maintaining audit trails and development traceability. Let’s dive into how feasible this migration is, and what you need to know.

Core Feasibility #

First off: yes, this migration is technically feasible with the right tooling and preparation. Micro Focus (now part of OpenText) provides a dedicated migration utility built to bridge ClearCase and Dimensions CM, and it supports your target Dimensions version (12.2.2.6) and ClearCase 7.

Key Data Preservation Capabilities #

The migration tool is designed to capture the critical data you care about:

• Full File History: It maps ClearCase’s Versioned Object Base (VOB) history directly to Dimensions’ repository structure. This includes every check-in, merge, comment, and timestamp for individual files—no gaps in your development record.
• Baseline & Label Integrity: ClearCase baselines (both full and incremental) translate cleanly to Dimensions’ baseline or snapshot objects. The tool maintains the exact association between each baseline and the set of file versions it references. You can even carry over custom baseline attributes, though you’ll need to map them to Dimensions’ metadata fields during configuration.
• Branching Structures: Branch hierarchies from ClearCase can be replicated in Dimensions, though you may need to adjust naming conventions to align with Dimensions’ branching model.

Critical Pre-Migration & Execution Steps #

To ensure a smooth migration with no data loss, focus on these steps:

• Audit & Clean Up Your VOBs: Start by pruning unused branches, obsolete labels, and corrupted history entries. This reduces migration overhead and avoids carrying over unnecessary bloat to Dimensions.
• Run a Pilot Migration: Test the process on a non-production VOB first. Validate that baselines match their original ClearCase counterparts, check that historical comments are intact, and resolve any metadata mapping issues before touching production data.
• Configure User & Metadata Mappings: Set up the tool to map ClearCase user accounts to Dimensions users, define how custom attributes (like issue tracker links) are transferred, and align repository structures to fit your Dimensions workflow.
• Post-Migration Validation: After the full migration, spot-check key baselines and historical change records to confirm everything is as expected. For example, compare a critical baseline in Dimensions against the original ClearCase baseline to ensure all file versions match.

Final Notes #

While the tool handles most of the heavy lifting, it’s important to review the official Dimensions 12.2.2.6 migration guide for version-specific nuances—especially around edge cases like complex merge histories or custom ClearCase extensions.

内容的提问来源于stack exchange，提问作者lpacley