Data retention: what to keep, what to delete
Elena Rostova
Head of Compliance & Privacy
Automated rolling purges keep ClickHouse indexes lean and guarantee compliance with GDPR storage limitation mandates.
Data minimization is not just a legal requirement under GDPR Article 5; it is the secret to blazing fast analytical queries.
By setting automated rolling retention schedules (e.g. 1 year for free starter tiers, 2 years for Pro), ClickHouse partitions are rotated out cleanly without manual table maintenance.
Every purge generates a cryptographically signed SHA-256 audit log, giving compliance officers undeniable proof of automated data hygiene.
Written by Elena Rostova
Published on July 10, 2026 in Privacy by Design
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