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Chapter 5. Developer previews
This section describes the developer preview features introduced in Red Hat OpenShift Data Foundation 4.16.
Developer preview feature is subject to Developer preview support limitations. Developer preview releases are not intended to be run in production environments. The clusters deployed with the developer preview features are considered to be development clusters and are not supported through the Red Hat Customer Portal case management system. If you need assistance with developer preview features, reach out to the ocs-devpreview@redhat.com mailing list and a member of the Red Hat Development Team will assist you as quickly as possible based on availability and work schedules.
5.1. Support for Topology awareness and Replica-1 in OpenShift Data Foundation external mode
OpenShift Data Foundation supports provisioning storage from replica-1 using a storage class. The storage class is created to provision storage from replica 1 Ceph pools that are located in separate zones. This helps applications that have multiple running instances with each service instance creating a new claim, which is expected to be located in a different zone. As these applications have their own redundant instances, they do not require redundancy at the data layer. For more information, see the knowledgebase article, OpenShift Data Foundation external mode support for RBD/block Replica-1 pools and topology awareness.
5.2. Multi-Volume Consistency for Backup - CephFS
To provide better support for applications and to support OpenShift Virtualization, crash consistent multi volume consistency groups are provided for backup solutions. This helps applications that are deployed over multiple volumes.
5.3. Storage class with replica 2 for CephFS
OpenShift Data Foundation provides a way to create a new CephFS based storage class with 2 replicas. This helps to provide better storage efficiency in case only CephFs is being used. Also, this provides a solution for unbalanced usage of either RBD or CephFS. For more information, see the knowledgebase article, Using replica 2 for CephFS.
5.4. Automatic scaling of RGW
OpenShift Data Foundation provides the ability to enable auto scaling to automatically adjust the serviceability and performance of RADOS Gateway (RGW) to serve as per the S3 load. For more information, see the knowledgebase article, Autoscaling for RGW in OpenShift Data Foundation via HPA using KEDA.
5.5. Ceph replica-2 pool with both disks in the same zone
To protect applications in case of an OSD disk failure, replica-2 pool with both disks in a single zone can be created.
For more information, see the knowledgebase article RBD Replica-2 with both disks in same zone.
5.6. RGW erasure coding in internal mode
Erasure coding deployment for RGW using CLI is supported to help reduce cost by increasing storage efficiency.
For more information, see the knowledgebase article Support for RGW Erasure Coding in Internal Mode.
