Connect to Redis from .NET on Windows

Whether you run a native Windows server (Memurai), Redis in WSL2, or a convenience Windows build, connecting from .NET is straightforward.

Your connection options

  • Memurai (native): connect to localhost:6379 by default. Runs as a Windows Service for reliable startup.
  • Redis via WSL2: if bound to all interfaces, localhost may work from Windows; otherwise use the distro IP and open the port in the firewall.
  • Direct Windows build (Cygwin-based): typically listens on localhost:6379. Use for quick local development.

Always avoid exposing Redis to the internet. Restrict access to your machine or dev subnet.

Health checks and timeouts

  • Ping on startup: perform a simple ping after opening the connection to detect misconfigurations early.
  • Timeouts: set realistic connect and sync timeouts to avoid long hangs during transient issues.
  • Pooling: reuse connections across your app rather than opening many short‑lived connections.
  • Command patterns: batch/pipe when appropriate and prefer small, consistent payloads for latency‑sensitive code paths.

Security and configuration

  • Password/TLS: if you enable authentication or TLS, ensure your client settings mirror the server.
  • Local firewall: allow only what you need. For dev, loopback/localhost is usually enough.
  • Data persistence: pick snapshotting or AOF based on your durability and performance requirements.
  • Resource limits: verify memory limits and eviction policies for your workload.

Common pitfalls on Windows

  • Port 6379 in use: ensure no other Redis‑compatible service is already bound. Adjust ports if needed.
  • AV/Defender scans: add exclusions for data/log directories to reduce I/O pauses.
  • WSL2 networking: if localhost fails, use the distro’s current IP or adjust binding inside WSL2.
  • Nagle/latency spikes: watch for network stack settings and avoid excessive tiny writes.

Testing your app end‑to‑end

  • Connectivity: run a simple end‑to‑end flow that writes and reads a key to validate the whole path.
  • Resilience: simulate transient failures (short restarts, packet loss) and confirm your retry/backoff strategy.
  • Throughput: profile with realistic data sizes and command mix to spot bottlenecks early.
  • Observability: keep basic metrics and logs for connection counts, errors, and slow commands.
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