IONOS Cloud incident

Final Notice: Update to PostgreSQL Replication Mode

Critical Resolved View vendor source →

IONOS Cloud experienced a critical incident on April 21, 2026 affecting Database as a Service (DBaaS), lasting 12d 15h. The incident has been resolved; the full update timeline is below.

Started
Apr 21, 2026, 04:58 PM UTC
Resolved
May 04, 2026, 08:03 AM UTC
Duration
12d 15h
Detected by Pingoru
Apr 21, 2026, 04:58 PM UTC

Affected components

Database as a Service (DBaaS)

Update timeline

  1. scheduled Apr 21, 2026, 04:58 PM UTC

    As communicated in an email notification earlier this year, we are finalizing the retirement of the legacy SYNCHRONOUS replication mode. To ensure continued stability, all remaining PostgreSQL clusters will be automatically migrated during their first scheduled maintenance window after May 4, 2026. What is changing? - Automatic Migration: Your cluster will be transitioned to ASYNCHRONOUS mode. - Impact: You will experience a brief restart during the maintenance window. While you may see improved write performance, please note that ASYNCHRONOUS mode prioritizes speed over strict data acknowledgment. Action Required for Strong Consistency If your workload requires a zero-data-loss guarantee, you must manually upgrade to STRICTLY_SYNCHRONOUS via the API no later than May 1, 2026: - Scale Replicas: Increase your cluster to 3 or more replicas. - Update API: Set the synchronization mode to STRICTLY_SYNCHRONOUS. Affected services: Database as a Service (DBaaS) Location: Global Services

  2. in progress May 01, 2026, 08:00 AM UTC

    Scheduled maintenance is currently in progress. We will provide updates as necessary.