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Hash Slots

6 articles · Page 1 of 1

Jun 9, 2026 · Databases

Zero‑Downtime Redis Cluster Expansion in Production

This guide details a step‑by‑step, zero‑downtime expansion of a 3‑master‑3‑slave Redis Cluster to a 4‑master‑4‑slave setup, covering node standardization, network checks, big‑key handling, full backups, monitoring, slot migration planning, progressive migration methods, replica addition, post‑expansion validation, rollback procedures, and practical lessons learned.

ClusterExpansionHash Slots

0 likes · 13 min read

Zero‑Downtime Redis Cluster Expansion in Production

Full-Stack Internet Architecture

Mar 17, 2025 · Databases

Understanding Redis Cluster Hash Slots: Concepts, Calculation, Allocation, and Dynamic Scaling

This article explains Redis cluster hash slots, how they partition data across 16,384 slots, the CRC16-based slot calculation, slot allocation to nodes, and demonstrates dynamic scaling operations such as adding, reshaping, and removing nodes with practical command‑line examples.

ClusterDynamic ScalingHash Slots

0 likes · 9 min read

Understanding Redis Cluster Hash Slots: Concepts, Calculation, Allocation, and Dynamic Scaling

dbaplus Community

Mar 4, 2025 · Databases

Why Does Redis Prefer Hash Slots Over Consistent Hashing?

Redis Cluster distributes data using 16,384 hash slots calculated via CRC16, a design that offers flexible slot allocation, simpler data migration, and better performance compared to traditional consistent hashing, and this article explains the slot mechanism, node scaling, client routing, and the reasons behind the 16K slot choice.

CRC16DatabaseHash Slots

0 likes · 9 min read

Why Does Redis Prefer Hash Slots Over Consistent Hashing?

LouZai

Jan 3, 2024 · Databases

Why Redis Chooses Hash Slots Over Consistent Hashing

The article explains how Redis Cluster distributes keys using CRC16‑based hash slots instead of traditional consistent hashing, detailing the slot calculation, node addition and removal processes, client redirection, smart client optimizations, and the design reasons behind the fixed 16,384 slot count.

CRC16ClusterHash Slots

0 likes · 9 min read

Why Redis Chooses Hash Slots Over Consistent Hashing

Practical DevOps Architecture

May 8, 2023 · Databases

Redis Performance Testing and Cluster Slot Mechanism Overview

This article explains how to use redis-benchmark for performance testing, compares single‑node and cluster throughput, and details Redis Cluster's hash‑slot architecture, including CRC16 hashing, slot allocation, scaling considerations, and operational nuances.

ClusterDatabaseHash Slots

0 likes · 4 min read

Redis Performance Testing and Cluster Slot Mechanism Overview

ITPUB

Nov 6, 2022 · Databases

Master‑Slave, Sentinel, and Cluster: Unlocking Redis High Availability

This guide explains Redis high‑availability mechanisms, covering master‑slave replication, the Sentinel monitoring and automatic failover process, and the Redis Cluster sharding architecture, including hash slots, MOVED/ASK redirection, gossip communication, and practical considerations such as data consistency, network partitions, and slot allocation.

ClusterGossipHash Slots

0 likes · 25 min read

Master‑Slave, Sentinel, and Cluster: Unlocking Redis High Availability