All 7 TLS & Encryption in Redis questions
More in TLS & Encryption in Redis
What certificate files are required to configure TLS on a Redis server? How does mutual TLS authentication differ from standard one way TLS, and why would you enable it for Redis? How do you configure a Redis client application, such as one using the redis-py library, to connect over TLS? What is the role of certificate expiration monitoring in maintaining a secure, always available Redis deployment? How do you enable TLS encryption for internal replication and cluster bus traffic between Redis nodes, not just for client connections?
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What performance considerations should you keep in mind when enabling TLS on a high throughput Redis deployment?

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Answer

TLS introduces some additional CPU overhead for encrypting and decrypting traffic and a small amount of latency for the initial handshake, so on very high throughput systems it helps to use connection pooling to avoid repeated handshakes, ensure the server hardware has adequate CPU capacity, and benchmark the actual impact under realistic load before rolling it out broadly.
redis-benchmark -h redis.example.com -p 6379 --tls \
  --cert client.crt --key client.key --cacert ca.crt -q
Real-world example A high traffic gaming platform benchmarks its Redis cluster with and without TLS enabled, confirming that connection pooling in its client library keeps the added latency low enough to remain within acceptable limits.

Common follow-ups: How does TLS overhead compare between using it for internal cluster traffic versus client to server traffic?;Are there hardware acceleration options for TLS encryption?

Redis Performance Tuning & Benchmarking;Connection Pooling & Client Libraries
All 7 TLS & Encryption in Redis questions