clustering

• Tokens and Vnodes

  How token ownership is assigned, what num_tokens changes, and why the value matters for repair and streaming.

  Cassandra · 2 min read

• ClickHouse Distributed Tables

  Fanning queries across shards, choosing a sharding key, and the query patterns that break down at scale.

  ClickHouse · 3 min read

• ClickHouse Replication

  ReplicatedMergeTree, ClickHouse Keeper, and the quorum settings that decide whether an acknowledged insert survives.

  ClickHouse · 3 min read

• MariaDB Common Problems

  Failure modes specific to MariaDB and Galera, and how to resolve each without losing data.

  MariaDB · 2 min read

• Galera Cluster

  Synchronous multi-primary replication in MariaDB — how certification works, the settings it requires, and its failure modes.

  MariaDB · 3 min read

• MariaDB Production Checklist

  MariaDB and Galera-specific checks to complete before the cluster carries production traffic.

  MariaDB · 1 min read

• MySQL Group Replication

  How Group Replication provides automatic failover and conflict detection, its single-primary and multi-primary modes, and its operational constraints.

  MySQL · 2 min read

• Redis Cluster

  Hash slots, resharding, and the multi-key constraints that shape application code in a clustered Redis.

  Redis and Valkey · 2 min read

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