The fastest open-source column-oriented database management system for real-time analytics.
ClickHouse is a high-performance, column-oriented database management system designed for online analytical processing (OLAP). In 2026, it remains the industry standard for real-time data warehousing, offering sub-second query latency on petabyte-scale datasets. Its technical architecture is built on vectorized query execution and massive parallel processing (MPP), which minimizes data movement and maximizes CPU utilization through SIMD instructions. ClickHouse's 2026 positioning highlights its evolution into a multimodal engine, integrating advanced vector search capabilities (HNSW) alongside its traditional structured data processing. This allows organizations to build RAG-based AI applications and real-time observability pipelines within a single, unified storage layer. The system decouples storage from compute in its cloud-native architecture, utilizing object storage (S3/GCS/Azure Blob) for cost-efficient scaling while maintaining a 'hot' local cache for performance. Its ability to ingest millions of rows per second from sources like Kafka and RabbitMQ, combined with sophisticated data compression techniques, makes it the primary choice for high-throughput environments such as AdTech, FinTech, and IoT telemetry.
A powerful storage engine that supports primary keys, partitions, and data replication.
Verified feedback from the global deployment network.
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Processes data in blocks rather than individual rows, utilizing CPU SIMD (Single Instruction, Multiple Data) sets.
Combines SQL filtering with high-speed HNSW indexing for vector embeddings.
Triggers that transform and store incoming data during ingestion.
Replicates data between nodes without physical copying when using shared object storage.
Automatically moves data between SSDs, HDDs, and Object Storage based on access frequency.
A C++ implementation of ZooKeeper coordination service specialized for ClickHouse.
Analyzing millions of network events per second to find patterns of intrusion.
Registry Updated:2/7/2026
Need to analyze past auction performance to set bid prices in milliseconds.
Tracking global SKU movements across 10,000+ stores in real-time.