ReplicatedMergeTree Archives | ChistaDATA Inc.

ClickHouse high availability

ClickHouse High Availability on 26.9: 8 Brutal Failure Drills, Measured

ChistaDATA Inc.

ClickHouse high availability on 26.9, tested: we broke a three-replica cluster with ClickHouse Keeper eight ways and measured what survived, with the SQL and runbooks our ClickHouse support team uses.

Real-Time Payments Analytics

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

ChistaDATA Inc.

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.

ClickHouse Sharding

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.

ClickHouse Upgrade

ClickHouse Upgrade Guide: 6 Proven Steps for Zero-Downtime Rolling LTS Upgrades

ChistaDATA Inc.

A production ClickHouse upgrade done properly is a rolling, replica-by-replica operation with zero query downtime, a measured before/after regression check, and a rollback posture decided before the first package is installed. Done casually, it is […]

ClickHouse Replication Lag: How to Detect and Resolve It

ChistaDATA Inc.

ClickHouse replication lag: a practical look at how it works, what to tune, and the pitfalls that trip up production ClickHouse.

* Everything changes over time – Our blogs/posts and comments changes over time, That’s how it should be! Whatever we comment from ChistaDATA Inc. Teams (including Shiv Iyer) and other stakeholders or guest bloggers posted here are never permanent, These things worked for us. But, there is no guarantee they will work for you too, When using the recommendations from ChistaDATA or MinervaDB or MinervaSQL or any other online resources / Google, You must test the advice before applying them to your production systems, and always invest for a robust Database DR solution, Thank you for understanding.

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