[Maintenance][WAW4-1, FRA1-2] from 27th to 30th of October 2026 (CET) - Storage System Upgrade

Dear Customer,

We would like to inform you about scheduled maintenance in the WAW4-1 and FRA1-2 regions, starting on **27 October 2026 at 08:30 CET and ending on 30 October 2026 at 15:00 CET.

During this maintenance window, we will upgrade the *Ceph storage clusters, including the Object Storage gateways (RGW), to Tentacle, based on upstream release **20.2.4* with custom CloudFerro patches.

The upgrade introduces the following improvements and changes relevant to Object Storage users:

• *Full support for trailing checksums:*
  Object Storage endpoints will fully support and validate streaming checksum trailers. Supported algorithms include *CRC32, CRC32C, CRC64NVME, SHA1, and SHA256*, for both single-part `PutObject` operations and multipart uploads. Invalid or corrupted checksum trailers will be rejected, while valid checksums will be persisted.
• *Object Lock support for existing versioned buckets:*
  Object Lock can now be enabled on existing versioned buckets, allowing compliance protection to be added to production buckets without migrating the stored data.
• *Change to bucket statistics returned by HEAD requests:*
  The `HeadBucket` API will no longer return the `X-RGW-Bytes-Used` and `X-RGW-Object-Count` headers by default. These headers will only be returned when the `read-stats` query parameter is explicitly included in the API request. *If your applications or integrations rely on these headers, please update the relevant API requests accordingly.*

During the maintenance window, users may experience *small latency spikes due to service daemon restarts* during the upgrade.

We will make every effort to minimize the impact on your services.

If you have any questions or experience any issues related to the maintenance, please contact our Helpdesk.

Kind regards,
CREODIAS Support Team