Segment 15
This sub-session focused on pragmatically addressing the highest-priority gaps identified by a prior analysis. The assistant implemented the `Unlink` method across `rbstor/rbs.go` and `rbstor/group.go`, added the necessary `UpdateGroupDeadBlocks` database method and schema migration for dead-block counters, and wrote dedicated unlink integration tests. It also replaced the stub `Fetch()` method in the Prefetcher with a working implementation that leverages the existing cache hierarchy and retrieval provider, and wired an eviction callback in the L1 ARC cache to automatically promote evicted items to the L2 SSD cache. Finally, the assistant investigated the project README, found it lacked any Ansible deployment documentation, and added a comprehensive section covering inventory configuration, playbook usage, and troubleshooting—making the deployment process accessible to new operators and closing a significant operational documentation gap.