7.3. Resource requirements
Red Hat OpenShift Data Foundation services consist of an initial set of base services, and can be extended with additional device sets. All of these Red Hat OpenShift Data Foundation services pods are scheduled by kubernetes on OpenShift Container Platform nodes. Expanding the cluster in multiples of three, one node in each failure domain, is an easy way to satisfy the pod placement rules.
These requirements relate to OpenShift Data Foundation services only, and not to any other services, operators or workloads that are running on these nodes.
| Deployment Mode | Base services | Additional device Set |
|---|---|---|
| Internal |
|
|
| External |
| Not applicable |
Example: For a 3 node cluster in an internal mode deployment with a single device set, a minimum of 3 x 10 = 30 units of CPU are required.
For more information, see 6章Subscriptions and CPU units.
For additional guidance with designing your Red Hat OpenShift Data Foundation cluster, see the ODF Sizing Tool.
CPU units
In this section, 1 CPU Unit maps to the Kubernetes concept of 1 CPU unit.
- 1 unit of CPU is equivalent to 1 core for non-hyperthreaded CPUs.
- 2 units of CPU are equivalent to 1 core for hyperthreaded CPUs.
- Red Hat OpenShift Data Foundation core-based subscriptions always come in pairs (2 cores).
| Deployment Mode | Base services |
|---|---|
| Internal |
|
| External |
|
Example: For a 3 node cluster in an internal-attached devices mode deployment, a minimum of 3 x 16 = 48 units of CPU and 3 x 64 = 192 GB of memory is required.
7.3.1. Resource requirements for IBM Z and IBM LinuxONE infrastructure
Red Hat OpenShift Data Foundation services consist of an initial set of base services, and can be extended with additional device sets.
All of these Red Hat OpenShift Data Foundation services pods are scheduled by kubernetes on OpenShift Container Platform nodes . Expanding the cluster in multiples of three, one node in each failure domain, is an easy way to satisfy the pod placement rules.
| Deployment Mode | Base services | Additional device Set | IBM Z and IBM® LinuxONE minimum hardware requirements |
|---|---|---|---|
| Internal |
|
| 1 IFL |
| External |
| Not applicable | Not applicable |
- CPU
- Is the number of virtual cores defined in the hypervisor, IBM Z/VM, Kernel Virtual Machine (KVM), or both.
- IFL (Integrated Facility for Linux)
- Is the physical core for IBM Z and IBM® LinuxONE.
Minimum system environment
- In order to operate a minimal cluster with 1 logical partition (LPAR), one additional IFL is required on top of the 6 IFLs. OpenShift Container Platform consumes these IFLs .
7.3.2. Minimum deployment resource requirements
An OpenShift Data Foundation cluster will be deployed with minimum configuration when the standard deployment resource requirement is not met.
These requirements relate to OpenShift Data Foundation services only, and not to any other services, operators or workloads that are running on these nodes.
| Deployment Mode | Base services |
|---|---|
| Internal |
|
If you want to add additional device sets, we recommend converting your minimum deployment to standard deployment.
7.3.3. Compact deployment resource requirements
Red Hat OpenShift Data Foundation can be installed on a three-node OpenShift compact bare metal cluster, where all the workloads run on three strong master nodes. There are no worker or storage nodes.
These requirements relate to OpenShift Data Foundation services only, and not to any other services, operators or workloads that are running on these nodes.
| Deployment Mode | Base services | Additional device Set |
|---|---|---|
| Internal |
|
|
To configure OpenShift Container Platform on a compact bare metal cluster, see Configuring a three-node cluster and Delivering a Three-node Architecture for Edge Deployments.
7.3.4. Resource requirements for MCG only deployment
An OpenShift Data Foundation cluster deployed only with the Multicloud Object Gateway (MCG) component provides the flexibility in deployment and helps to reduce the resource consumption.
| Deployment Mode | Core | Database (DB) | Endpoint |
|---|---|---|---|
| Internal |
|
|
注記 The defaut auto scale is between 1 - 2. |
7.3.5. Resource requirements for using Network File system
You can create exports using Network File System (NFS) that can then be accessed externally from the OpenShift cluster. If you plan to use this feature, the NFS service consumes 3 CPUs and 8Gi of Ram. NFS is optional and is disabled by default.
The NFS volume can be accessed two ways:
- In-cluster: by an application pod inside of the Openshift cluster.
- Out of cluster: from outside of the Openshift cluster.
For more information about the NFS feature, see Creating exports using NFS
7.3.6. Resource requirements for performance profiles
OpenShift Data Foundation provides three performance profiles to enhance the performance of the clusters. You can choose one of these profiles based on your available resources and desired performance level during deployment or post deployment.
| Performance profile | CPU | Memory |
|---|---|---|
| Lean | 24 | 72 GiB |
| Balanced | 30 | 72 GiB |
| Performance | 45 | 96 GiB |
Make sure to select the profiles based on the available free resources as you might already be running other workloads.
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