Database / BetterDB Interview questions
Explain the internal working of BetterDB Monitor's unified database adapter?
The adapter sits on top of the wire-compatible iovalkey client, so the rest of the application – dashboards, analytics, the REST API – talks to one interface regardless of whether the underlying server is Valkey or Redis.
With DB_TYPE=auto, the adapter's first job on connecting is identifying the server by inspecting its INFO response, then probing for version-gated capabilities: COMMANDLOG on Valkey 8.1+, CLUSTER SLOT-STATS, per-thread I/O metrics, and so on.
That capability detection happens once, centrally, in the adapter, rather than being re-checked ad hoc by every feature that might need it. The rest of the app then simply asks the adapter what's supported and renders accordingly – hiding a COMMANDLOG panel against Redis, for instance – so unsupported commands never get fired at a server that can't handle them, and the same build behaves correctly across the whole Valkey/Redis version matrix.
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