Tag: #redis

← All posts

• The Generational Shift in Data Stores and Queues — Licenses, Forks and the Apache Attic

  Ten projects in the data layer that gave up their place or had their distribution terms changed, documented using only official announcements and Apache Attic records as evidence. The license changes at Redis, Elasticsea

  2026-08-12 · 9 min read #open-source#database#kafka#redis#elasticsearch

• Choosing a Rate Limiting Algorithm — What Really Separates Fixed Window, Sliding, and Token Bucket

  Letting 200 requests through a 100-per-minute limit is not a bug. It is the defined behaviour of the fixed window algorithm. This post compares the memory and accuracy tradeoffs of four approaches — fixed window, sliding

  2026-07-26 · 12 min read #web#rate-limiting#api-design#redis#reliability

• Redis 8.8's Array Type — The First New Core Data Structure Since Streams, and What Valkey Doesn't Have

  In May 2026, Redis 8.8 and Valkey 9.1 shipped six days apart. Redis 8.8 adds Array, a new core data structure built directly by antirez — a sparse index-addressed container for data where the index itself carries meaning

  2026-07-16 · 16 min read #redis#valkey#data-structures#performance#open-source

• Message Queues & Async, Explained: Queue, Kafka, RabbitMQ, Redis, asyncio

  From a plain FIFO queue to Kafka partitioned logs, RabbitMQ exchanges and routing, Redis lists, Pub/Sub, and Streams, and finally Python asyncio event loops. A clear, side-by-side intro to the core ideas behind message q

  2026-07-03 · 11 min read #message-queue#kafka#rabbitmq#redis#asyncio

• The 2026 Open Source License Shift — A Deep Dive on the BSL Wave: Elastic, Redis, HashiCorp, Sentry, Valkey, OpenTofu ♪ Listenable

  Since MongoDB moved to SSPL in 2018, Elastic in 2021, HashiCorp in 2023, and Redis in 2024 have all left Apache/MIT for non-OSI licenses like BSL, SSPL, and RSALv2. The result has been a stream of community forks (OpenSe

  2026-05-16 · 31 min read #open-source#license#bsl#sspl#agpl

• In-memory Caching & KV Stores in 2026 — Redis 8 / Valkey / KeyDB / Dragonfly / Memcached / Garnet (Microsoft) / Speedb Deep Dive ♪ Listenable

  A snapshot of the great in-memory cache schism that Redis kicked off in March 2024 when it switched to RSALv2/SSPL — and where the dust has settled in May 2026. Redis 8 after the relicense, the Linux Foundation Valkey fo

  2026-05-16 · 24 min read #caching#key-value-store#redis#valkey#keydb

• Feature Stores 2026 Deep Dive — Feast, Tecton, Hopsworks, Databricks, Vertex AI, SageMaker, Featureform, Bytewax, Materialize, RisingWave, Fennel, Chalk ♪ Listenable

  A no-marketing tour of the 2026 feature store landscape: Feast (CNCF sandbox), Tecton (with the Eppo merger), Hopsworks, Vertex AI Feature Store, SageMaker Feature Store, Databricks Feature Engineering in Unity Catalog,

  2026-05-16 · 17 min read #feature-store#feast#tecton#hopsworks#databricks

• Open Source Licensing 2026 — BSL, SSPL, FSL, and 8 Years of Rebellion Against the Cloud — A Deep Dive (2026) ♪ Listenable

  In a world where MIT and Apache 2.0 still account for 90% of open source, the 'rebellion' that started when MongoDB unveiled SSPL in 2018 has reached its eighth year. Elastic has returned to AGPL. Redis has followed the

  2026-05-14 · 25 min read #open-source#licensing#bsl#sspl#fsl

• Redis Production Operations Complete Guide 2025: Cluster, Persistence, Memory, Redis 7+

  Everything about Redis in production! 8 data structures, persistence (RDB vs AOF), Sentinel vs Cluster, memory management (maxmemory-policy), performance tuning, Redis 7+ features, Valkey/KeyDB comparison, monitoring and

  2026-04-15 · 8 min read #redis#cache#production#cluster#persistence

• Distributed Locks Complete Guide 2025: Redlock, Zookeeper, etcd, Fencing Token, Safe Implementation

  Everything about distributed locks! Why it is hard, single Redis lock, Redlock algorithm, Martin Kleppmann critique, Zookeeper/etcd locks, Fencing Token, real-world implementation, pitfalls to avoid.

  2026-04-15 · 13 min read #distributed-lock#redis#redlock#zookeeper#etcd

• Redis Internals & Distributed Cache — Single Thread, Data Structures, Cluster, Sentinel, RDB/AOF, Redlock, Valkey, Dragonfly Deep Dive (2025)

  Why does single-threaded Redis hit 1M QPS? From String to Stream across 9 data structures, Cluster hash slots, Sentinel HA, RDB/AOF tradeoffs, Cache-Aside and Thundering Herd, the Redlock debate, the 2024 license drama a

  2026-04-15 · 15 min read #redis#valkey#cache#distributed-systems#infra

• The Complete Guide to Database Fundamentals — SQL, Normalization, Indexes, Transactions, NoSQL

  Everything about databases from SQL basics to normalization, index internals (B-Tree), transactions (ACID), NoSQL selection criteria, and query optimization.

  2026-04-12 · 17 min read #database#sql#nosql#postgresql#mongodb

• Database Complete Comparison 2025: PostgreSQL vs MySQL vs MongoDB vs Redis — Selection Guide ♪ Listenable

  Everything about database selection in 2025! PostgreSQL (JSONB+pgvector), MySQL (HeatWave ML), MongoDB (Atlas Vector Search), Redis (Stack/Search) — architecture, performance benchmarks, cost comparison, use-case selecti

  2026-03-23 · 29 min read #database#postgresql#mysql#mongodb#redis

• Redis Complete Guide 2025: Caching Strategies, Data Structures, Pub/Sub, and Redis Stack

  Everything about Redis! 5 data structures, caching patterns (Cache-Aside/Write-Through/Write-Behind), Pub/Sub, Redis Streams, Redis Stack (JSON/Search/TimeSeries), Lua scripting, Cluster architecture, and interview quest

  2026-03-23 · 19 min read #redis#caching#data-structures#pubsub#redis-stack

• [Architecture] Complete Guide to Rate Limiting and API Throttling

  A comprehensive guide covering rate limiting algorithms (Token Bucket, Sliding Window, etc.), Redis/Nginx/Kong implementations, LLM API cost control, and distributed rate limiting.

  2026-03-20 · 18 min read #architecture#rate-limiting#api-gateway#redis#nginx

• Database Engineering Complete Guide: From SQL to Vector DBs and AI RAG Systems

  A comprehensive database engineering guide for the AI era — covering advanced SQL, pgvector similarity search, Pinecone, Redis caching, distributed systems theory, and building RAG pipelines with LangChain.

  2026-03-17 · 18 min read #database#postgresql#vector-database#pgvector#rag

• Redis Cluster High Availability and Failover Guide ♪ Listenable

  A practical guide to Redis Cluster high availability architecture, failover mechanisms, and production operations.

  2026-03-14 · 20 min read #redis#database#high-availability#cluster#sentinel

• Redis Cluster Architecture and High Availability Operations Guide: Sentinel, Cluster Mode, Memory Optimization, and Disaster Recovery

  Compare Redis Standalone, Sentinel, and Cluster deployment modes. Cover Sentinel quorum-based failure detection and automatic failover, Cluster hash slots and resharding, PSYNC replication, maxmemory policies and LRU/LFU

  2026-03-12 · 14 min read #database#redis#cluster#sentinel#high-availability

• Distributed Lock Pattern Comparison: Redis Redlock vs ZooKeeper vs etcd — Consistency and Availability Trade-offs

  Compare distributed lock implementation patterns that guarantee mutual exclusion in distributed systems. Analyze consistency, availability, and performance trade-offs through the Redis Redlock algorithm and Martin Kleppm

  2026-03-12 · 17 min read #architecture#distributed-lock#redis#redlock#zookeeper

• Complete Guide to Redis Caching Strategies — 6 Practical Patterns from Cache-Aside to Write-Behind

  Covers 6 Redis caching strategies (Cache-Aside, Read-Through, Write-Through, Write-Behind, Refresh-Ahead, and Cache Stampede prevention) with code examples.

  2026-03-03 · 9 min read #database#redis#caching#cache-aside#write-through