A compute cluster is a group of high performance computing (HPC), GPU, or optimized instances that are connected with a high-bandwidth, ultra low-latency network. Each node in the cluster is a bare metal machine located in close physical proximity to the other nodes. A remote direct memory access (RDMA) network between nodes provides latency as low as single-digit microseconds, comparable to on-premises HPC clusters.
When you create a compute cluster, you create an empty RDMA network group. After the group is created, you can add instances to the group, or delete instances from the group. Compute clusters allow you to manage instances in the cluster individually, and you can have different types of instances in the cluster.
Tip
If you want predictable capacity for a specific number of identical instances that are managed as a group, use cluster networks with instance pools instead.
For steps to manage compute clusters, see the following topics:
To use Oracle Cloud Infrastructure, an administrator must be a member of a group granted security access in a policy by a tenancy administrator. This access is required whether you're using the Console or the REST API with an SDK, CLI, or other tool. If you get a message that you don't have permission or are unauthorized, verify with the tenancy administrator what type of access you have and which compartment your access works in.
For administrators: To allow users to do all things with compute clusters in all compartments, write the following policy:
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Allow group ComputeClusterUsers to manage compute-clusters in tenancy