Database / BetterDB Interview questions

What is the purpose of BetterDB Monitor's Prometheus endpoint?

BetterDB Monitor exposes over 100 metrics, all prefixed betterdb_, at GET /api/prometheus/metrics in standard Prometheus text format, so any existing Prometheus server can scrape it exactly like it would scrape a normal exporter, with no custom parsing needed.

The metrics cover ACL audit events, client connections, slowlog and COMMANDLOG patterns, memory, throughput, keyspace, replication, and cluster slot stats, alongside the Node.js runtime metrics of the monitor process itself.

The point of exposing all this through Prometheus rather than only through BetterDB's own dashboard is integration: teams that already run Grafana, alerting rules, and dashboards built around Prometheus can fold Valkey and Redis visibility straight into that existing stack instead of maintaining a second, disconnected monitoring surface.

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What prefix do BetterDB Monitor's Prometheus metrics use? valkey_

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redis_exporter_

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betterdb_

✓ Correct! Well done.

nest_

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Roughly how many metrics does the Prometheus endpoint expose? 5

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1000+

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12

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100+

✓ Correct! Well done.

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What is BetterDB Monitor? What is BetterDB for Valkey? What are the two Docker image variants for BetterDB Monitor? What is the purpose of the BetterDB MCP server? What are the storage backends supported by BetterDB Monitor? How do you run BetterDB Monitor with a single Docker command? How do you install BetterDB Monitor without Docker? What is the minimum Valkey version BetterDB Monitor supports? Define COMMANDLOG support in BetterDB Monitor? What is the default port for the BetterDB Monitor dashboard? What are the key browser features in BetterDB for Valkey? What are the connection settings in BetterDB for Valkey? Describe the tech stack behind BetterDB Monitor? What is the purpose of BetterDB Monitor's Prometheus endpoint? What is host.docker.internal used for with BetterDB Monitor? Which data types support full CRUD in BetterDB for Valkey? What is the ENCRYPTION_KEY variable used for in BetterDB Monitor? List the ways you can access data in BetterDB Monitor? Why does BetterDB Monitor need PostgreSQL for production deployments? How does BetterDB Monitor detect Valkey versus Redis automatically? What is the difference between BetterDB Monitor's memory and postgres storage? When should you use BetterDB Monitor's offline license instead of an online key? How does BetterDB Monitor persist license state across restarts? Explain how SSH tunnels work in BetterDB Monitor? Why doesn't BetterDB Monitor's Docker image bundle SQLite support? What is the difference between the two SSH key sources in BetterDB Monitor? How does BetterDB Monitor's anomaly detection identify problems? What is capacity forecasting in BetterDB Monitor? How do webhooks work in BetterDB Monitor? What is the difference between BetterDB Monitor and BetterDB for Valkey? How does the Search Query Runner build hybrid KNN queries? When would you choose the CLI install over Docker for BetterDB Monitor? What happens when you enable BetterDB Monitor's experimental AI Helper? Why should you set BETTERDB_SSH_KEY_DIR in BetterDB Monitor? Explain the three-phase workflow of BetterDB Monitor's live migration? What is the difference between Key Analytics and Hot Key Tracking? How does semantic cache intelligence help AI applications in BetterDB Monitor? Explain the execution flow when BetterDB Monitor ingests OpenTelemetry traces? Which is better for VPC-only instances: SSH tunnel or the BetterDB agent? How does the VS Code extension protect vector fields during key edits? What is the difference between MONITOR captures and slowlog analytics? How does BetterDB Monitor prevent tampering with offline license tokens? Explain the internal working of BetterDB Monitor's unified database adapter? What is the difference between ACL audit trail and client analytics? How can you optimize Prometheus scraping for a clustered BetterDB Monitor deployment? When should you pin the SSH host key fingerprint on a connection? Why is COMMANDLOG exclusive to Valkey rather than Redis in BetterDB Monitor? How do you troubleshoot license persistence failing with EACCES errors? Explain the known limitation of SSH tunnels with cluster topologies? How does BetterDB Monitor's cluster visibility feature work?

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What are the connection settings in BetterDB for Valkey? List the ways you can access data in BetterDB Monitor? How do you install BetterDB Monitor without Docker? What are the key browser features in BetterDB for Valkey? What is the purpose of BetterDB Monitor's Prometheus endpoint? What is the ENCRYPTION_KEY variable used for in BetterDB Monitor? What are the two Docker image variants for BetterDB Monitor? How do you run BetterDB Monitor with a single Docker command? Define COMMANDLOG support in BetterDB Monitor? What is the default port for the BetterDB Monitor dashboard? How can you optimize Prometheus scraping for a clustered BetterDB Monitor deployment? Describe the tech stack behind BetterDB Monitor? What is host.docker.internal used for with BetterDB Monitor? Which data types support full CRUD in BetterDB for Valkey? What is BetterDB Monitor? What is BetterDB for Valkey? What is the purpose of the BetterDB MCP server? What are the storage backends supported by BetterDB Monitor? What is the minimum Valkey version BetterDB Monitor supports? Why does BetterDB Monitor need PostgreSQL for production deployments?

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