FIND-20260324-004 · 2026-03-24 · Innovation Veille
ClickHouse 26.2 Released — Embedded observability (ClickStack), time-based streaming flush, TOTP auth
release
HIGH
ClickHouse 26.2 (stable v26.1.6.6 as of March 20 2026) is described as one of the most substantial releases in project history. Key features: embedded observability via ClickStack UI (replaces Grafana/Prometheus for OLAP monitoring), native TOTP authentication, time-based flushing for streaming inserts (input_format_max_block_wait_ms), improved OUTER JOIN performance, lazy database loading for faster startup, and Google BigLake integration. The streaming ingestion improvements are directly relevant to ODS Zero-ETL architecture.
Source
https://clickhouse.com/blog/clickhouse-release-26-02
ODS Impact
ODS Data Platform uses ClickHouse as the OLAP store receiving CDC events from Debezium via Redpanda. The time-based flushing (input_format_max_block_wait_ms) reduces operational complexity for slow event streams. The embedded ClickStack observability removes the need for external Prometheus/Grafana for OLAP monitoring. TOTP authentication strengthens multi-tenant security. Consider upgrading from any earlier 25.x version to 26.x in the data platform layer.
Security Review
License: Apache-2.0 | Maintenance: ACTIVE | Risk: LOW | Recommendation: SAFE_TO_USE
Tags
clickhouse
release
zero-etl
streaming
observability
olap
data-platform