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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteOracle Cloud Infrastructure (OCI) bare metal instances are dedicated physical servers that run workloads directly on hardware, without a hypervisor or management agents installed. They are a strong fit when an application needs a whole server’s resources, direct hardware control, high storage or network performance, or strict performance isolation. If the workload can share physical infrastructure and does not need those capabilities, an OCI virtual machine (VM) may be the more flexible fit.
What OCI bare metal means
A bare metal instance gives you access to a dedicated physical server, with control from the operating system through the application layer. Oracle describes the option as providing dedicated physical server access for high performance and strong isolation. Its bare metal product information describes execution without hypervisors or management agents installed.
OCI also provides VMs on the same underlying cloud-optimized hardware and software stack. A VM is appropriate when an application does not need the performance or resources of an entire physical machine. Bare metal is not automatically faster or more economical for every workload: the benefit depends on whether the application can use the server’s resources and whether its isolation, storage, network, or licensing needs justify the choice.
How to choose a bare metal shape
Choose by workload requirements, not just by the label. OCI shape families vary in processor architecture, memory, storage, networking, and accelerator support; available generations and capacity can change. Confirm the exact shape and its availability in your intended region before planning a deployment.
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| Shape family | Best fit | What to verify |
|---|---|---|
| Standard | General-purpose applications needing balanced CPU, memory, and network resources. | Processor architecture and the CPU and memory profile. OCI guidance lists Intel, AMD, and Arm options. |
| Dense I/O | Large databases and big-data workloads that need high storage performance and throughput. | Whether the workload needs local NVMe, its capacity and throughput requirements, and how data will be retained or recovered. |
| GPU | AI and machine-learning workloads, video or image rendering, and data-telemetry analysis that can use hardware acceleration. | Accelerator needs, the applicable shape and region, and whether a multi-node design requires specialized cluster networking. |
| HPC and optimized | High-frequency processing, hardware-accelerated tasks, and massively parallel workloads such as scientific simulation or large-scale analysis. | Processor frequency, parallelism, RDMA and low-latency networking needs, and the file-system design for shared data. |
| Confidential | Workloads requiring hardware-level protection for data in use. | Whether the specific shape and region support the required confidential-computing capability. |
Top considerations before choosing
Performance consistency and isolation
Dedicated physical resources avoid contention with other tenants for the server’s compute resources, which can make performance more predictable for workloads sensitive to noisy neighbors. This does not remove the need to size the server correctly or monitor utilization: an under-sized or underused dedicated server can still be a poor fit.
CPU, memory, and software compatibility
Match the application to the shape’s OCPUs, memory, processor architecture, and frequency. Check that the operating system, software stack, and any required acceleration support that architecture. Shape generations change over time, so validate current specifications rather than assuming that a familiar shape name has unchanged characteristics.
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Local NVMe or persistent attached storage
Local NVMe can suit scratch data and I/O-intensive databases that benefit from high local storage performance. It is not a substitute for persistent storage: when an instance is terminated, changes on local drives are lost. Attached-volume data persists beyond instance termination, making network-attached storage the relevant choice for data that must outlive the server. Plan backup, recovery, and replacement procedures around the storage type.
Network and cluster design
Standalone applications may have modest network requirements, while GPU and HPC clusters can depend on low latency, RDMA, and carefully designed node-to-node communication. Oracle documents 100 Gb/sec RDMA networking for applicable GPU cluster configurations; that figure is specific to those configurations, not a general promise for every bare metal instance. HPC designs may also use parallel file systems. Validate the networking and storage pattern for the exact shape and cluster before committing to a design.
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Security requirements and operating controls
Dedicated hardware is one isolation property, not a complete security program. Use OCI identity and network controls, and consider shielded or confidential capabilities only where the required feature is supported by the chosen shape and region. Include vulnerability scanning for missing patches and open ports, monitoring, and an operational plan for instance replacement. Validate image availability and regional constraints before launch.
Software licensing
Some software is licensed per host or node, which can make a whole-server deployment relevant because the physical host can be licensed as a unit. Licensing terms differ by vendor and product; confirm them directly with the software vendor before comparing a bare metal deployment with a VM.
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Regional capacity and launch readiness
Capacity and image availability depend on the shape and region. Confirm that the exact shape is available where the application must run, and validate the required image and regional constraints before launch. A design that works in one region should not be assumed to have equivalent availability elsewhere.
Total cost rather than instance rate alone
Oracle documents per-second on-demand billing for applicable compute capacity. That billing basis does not by itself establish the full cost of a deployment. Include attached storage, network use, operating-system or software licenses, and any cluster services in the estimate. Compare the cost of the resources the workload actually uses against a VM configuration that meets its requirements.
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- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
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When bare metal is a good fit
- Large relational databases and high-I/O platforms: Consider Dense I/O or local NVMe where the application can benefit from the required storage performance.
- AI, rendering, and telemetry workloads: GPU shapes are relevant when the software can use their hardware acceleration.
- HPC and parallel computing: Bare metal can suit scientific simulation, deep learning, and large-scale data analysis when paired with the required RDMA, cluster design, and parallel file-system pattern.
- Strict performance isolation: Dedicated server resources can help when predictable performance matters and shared physical infrastructure is unsuitable.
- Host-based licensing or specialized software: Direct access to a full server can fit licensing arrangements or software stacks that need hardware-level control, subject to vendor terms and compatibility.
When an OCI VM is the better fit
Choose a VM when the application does not require the CPU, memory, network bandwidth, storage throughput, or isolation of an entire physical server. VMs share physical infrastructure and can be a better match for workloads that do not need a full host. Compare the exact resource and capability requirements rather than treating bare metal as the default for performance-sensitive software.
Quick Recap
A practical decision checklist
- Define the workload: Record CPU architecture, OCPU and memory needs, storage throughput, network bandwidth, accelerator use, and required isolation.
- Choose the shape family: Match general-purpose work to Standard, local high-I/O needs to Dense I/O, acceleration to GPU, parallel work to HPC or optimized, and data-in-use protection to a supported Confidential shape.
- Choose storage deliberately: Decide what can live on local NVMe and what must persist on attached volumes; document backup and recovery behavior.
- Validate the deployment environment: Confirm shape capacity, image availability, and feature support in the intended region. For clusters, validate the complete RDMA, network, and parallel-storage design.
- Check security and licensing: Map required OCI controls and supported shielded or confidential features, then confirm software licensing and architecture compatibility with the relevant vendors.
- Estimate the whole deployment: Include applicable compute billing, attached storage, networking, software licenses, and cluster services. Compare against a VM sized to the same workload requirements.
- Plan operations: Monitor utilization and vulnerability findings, and ensure local-drive data can be recreated or recovered before instance replacement or termination.
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