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bongoDev | Redis Replication Architecture: Primary, Replicas & Asynchronous State - Redis Reliability Pro

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TopicRedis Reliability Pro

01Redis Reliability Mental Model: Speed, State, Failure & RecoveryPreview
02Choose the Redis Role: Cache, Primary Store, Coordination, Pub/Sub or Stream
03Redis Execution Model: Event Loop, I/O, Command Work & Blocking Risk

04Build a Reproducible Redis Lab: Docker, Configuration & Baseline

05RESP, Connections, Client Libraries, Pools & Timeouts

06Redis Data Structures & Their Reliability Implications

07Key Design, Namespacing, Ownership & Lifecycle

08Redis Memory Model: Dataset, Overhead, Allocator & Buffers

09maxmemory & Eviction Policies: Reliability Under Memory Pressure

10TTL & Expiration Engineering: Freshness, Jitter & Expiry Storms

11Hot Keys: Detect, Explain & Eliminate Single-Key Bottlenecks

12Big Keys & Large Collections: Memory, Latency & Delete Risk

13Command Complexity & Blocking Operations

14SCAN vs KEYS: Production-Safe Keyspace Inspection

15Pipelining: Reduce Round Trips Without Changing Atomicity

16Transactions: MULTI, EXEC, WATCH & Optimistic Concurrency

17Lua Scripts & Redis Functions: Atomic Server-Side Logic

18Client-Side Caching & Tracking: Faster Reads, New Consistency Risks

19RDB Snapshots: Point-in-Time Persistence & Recovery Trade-Offs

20AOF: Append-Only Persistence, fsync & Multi-Part AOF

21RDB + AOF, Restart Semantics & Persistence Selection

22Fork, Copy-on-Write & Persistence-Induced Latency

23Backup Architecture, Off-Host Copies & Restore Drills

24Redis Replication Architecture: Primary, Replicas & Asynchronous State

25Partial Resynchronization, Replication Backlog & Full Sync

26Replication Lag, Stale Reads & Read-After-Write Semantics

27WAIT & WAITAOF: Improving Write Safety Without Claiming Strong Consistency

28Redis Sentinel Architecture: Monitoring, Discovery & Automatic Failover

29Sentinel Quorum, Failover, Split-Brain Risk & Fencing

30Sentinel Operations: TILT, Maintenance & Client Recovery

31Redis Cluster Architecture: 16,384 Hash Slots & Horizontal Sharding

32Cluster Clients, MOVED/ASK Redirections & Topology Refresh

33Hash Tags & Multi-Key Operations in Cluster

34Resharding & Rebalancing Without Losing Operational Control

35Cluster Failover, Replica Placement & Failure Domains

36Hot Shards, Partition Strategy & Uneven Workloads

37Cluster Consistency & Availability During Network Partitions

38Cache-Aside: Fast Reads Without Turning Cache Failure Into Database Failure

39Read-Through, Write-Through & Write-Behind Trade-Offs

40Cache Stampede, Singleflight & Request Coalescing

41Stale-While-Revalidate & Graceful Cache Degradation

42Negative Caching & Failure Amplification

43Cache Invalidation & Consistency Contracts

44Distributed Locks: Ownership, Expiry, Fencing & Safety Boundaries

45Rate Limiting with Redis: Counters, Windows & Atomicity

46Coordination, Leader Election & Lease-Based Work

47Redis Pub/Sub & Sharded Pub/Sub: Delivery Semantics

48Redis Streams: Durable Append-Only Event Processing

49Streams Consumer Groups: PEL, Acknowledgment & At-Least-Once Work

50Streams Recovery: XAUTOCLAIM, Poison Messages, DLQ & Safe Redrive

51Redis Streams vs Kafka/RabbitMQ/SQS: Reliability Decision Framework

52Sessions, Tokens & Expiring Security State

53Sorted Sets for Schedulers, Delayed Work & Rankings

54Redis Authentication, ACLs & Least Privilege

55TLS, Network Exposure, Protected Mode & Secret Rotation

56INFO as the Redis Operational Baseline

57SLOWLOG & Latency Monitor: Finding Server-Side Latency

58Memory Diagnostics: MEMORY STATS, USAGE, DOCTOR & Fragmentation

59Client & Network Diagnostics: Connections, Buffers & Blocked Clients

60Replication, Sentinel & Cluster Observability

61Prometheus/Grafana Alerting for Redis SLOs

62Benchmarking Redis Without Lying to Yourself

63Capacity Planning: Working Set, Headroom, Eviction & Failure Capacity

64Performance Tuning: Data Shape Before Configuration Knobs

65Redis on Containers & Kubernetes: Stateful Runtime Trade-Offs

66Managed Redis Reliability: Understand the Provider Boundary

67Configuration Management, Runtime CONFIG & Drift

68Upgrades, Compatibility & Rolling Maintenance

69Cache Warm-Up & Recovery Storm Control

70Cache Penetration & Unbounded-Key Attack Protection

71Cache Avalanche Across Many Keys & Shared TTL Boundaries

72Lazy Freeing, UNLINK & Deletion/Expiration Latency

73Keyspace Hit Ratio, Evictions & Origin Amplification

74Dangerous Commands, ACL Categories & Operational Guardrails

75Hot Key Mitigation with Local Caching, Sharding & Replication

76Persistence Corruption & File Validation

77Failover Data Loss Windows & Application Idempotency

78Cluster Resharding, Hash Tags & Transactional Boundaries

79Redis Modules/Search/JSON/Vector Features: Reliability Boundaries

80Production Readiness Review for Redis

81Lab: Cache Outage Without Killing the Primary Database

82Lab: Memory Pressure, Eviction Storm & Cache-Hit Collapse

83Lab: Sentinel Primary Failure, Promotion & Client Reconnection

84Lab: Redis Cluster Hot Shard & Online Resharding

85Lab: Persistence Failure, Restart & Restore/Data-Loss Window

86Lab: Stream Consumer Crash, Pending Work, Reclaim & Safe Redrive

87Redis Production Troubleshooting Playbook

88Redis Command & Evidence Playbook: What Each Command Proves

89Redis Reliability Pro Cheatsheet

Englishবাংলা

Knowledge Hub/Redis Reliability Pro/Redis Replication Architecture: Primary, Replicas & Asynchronous State

Redis Reliability Pro

Paid lesson · Intermediate · 44 min read

Redis Replication Architecture: Primary, Replicas & Asynchronous State

Understand replication before relying on replicas for reads, failover or durability.

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