ClickHouse Sharding Archives

Real-Time Payments Analytics on ClickHouse: 6 Proven Layers for Southeast Asia

A reference model for real-time payments analytics on ClickHouse with the Apache stack (Kafka, Flink, Iceberg, Spark, Airflow, Superset) for a high-volume Southeast Asian mobile payment platform: schema, ingestion, serving, residency and operations.

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ClickHouse Performance Settings in 26.8 LTS: 14 Proven Changes

ChistaDATA Inc.

The ClickHouse performance settings that changed between 26.3 LTS and 26.8 LTS: what each default does to ingest, aggregation, joins and distributed execution, how to measure it, and the rollout method we use.

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ClickHouse Sharding Troubleshooting and Performance Optimization

ChistaDATA Inc.

A field guide to ClickHouse sharding troubleshooting: Distributed send-queue backlogs, duplicate rows from internal_replication, shard skew, initiator merge bottlenecks, distributed JOIN failures and unavailable shards, each with the system.* evidence, the mechanism, the staged fix, and the alert that catches it early.

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Scaling ClickHouse Horizontally: Sharding, Distributed Tables, and Parallel Replicas

ChistaDATA Inc.

Horizontal scale is where most ClickHouse fleets accumulate their deepest operational debt. ClickHouse sharding gets introduced months before the workload justifies it, and once a sharding key is baked into a production Distributed table, unwinding […]

ClickHouse Shard Contention Troubleshooting: A Complete Guide

ChistaDATA Inc.

ClickHouse shard contention is one of the most frustrating performance problems a distributed database team can face. When a cluster scales out to dozens or hundreds of nodes, the promise of linear scalability quietly breaks […]

Mastering Custom Partitioning Keys in ClickHouse: A Complete Guide

Shiv Iyer

Mastering Custom Partitioning Keys in ClickHouse: A Complete Guide When working with large-scale data analytics, proper partitioning strategy can make the difference between lightning-fast queries and sluggish performance. ClickHouse’s custom partitioning keys offer powerful capabilities […]

Building Fast Data Loops in ClickHouse®

ChistaDATA Inc.

Building Fast Data Loops in ClickHouse: From Insert to Query Response in ClickHouse® In today’s data-driven world, the speed at which you can ingest, process, and query data determines your competitive advantage. ClickHouse® excels at […]

Data Compression in ClickHouse for Performance and Scalability

ChistaDATA Inc.

Implementing Data Compression in ClickHouse: A Complete Guide to Optimal Performance and Scalability Introduction Data compression in ClickHouse is a critical optimization technique that can dramatically improve query performance, reduce storage costs, and enhance overall […]

Building Multi-Tenant ClickHouse Clusters

ChistaDATA Inc.

Achieve Peak Efficiency: Next-Level ClickHouse Cluster Resource Management Introduction Multi-tenancy in analytical databases presents unique challenges that go beyond traditional OLTP systems. ClickHouse, with its columnar architecture and distributed processing capabilities, offers powerful mechanisms for […]

Shard Rebalancing Methods in ClickHouse

ChistaDATA Inc.

Introduction : Shard Rebalancing Sharding is a pivotal concept in managing large-scale databases, especially when dealing with voluminous data that exceeds the storage capacity of a single server. This article explores the intricate world of […]

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