Compute-optimized instances are ideal for compute-intensive and high performance computing (HPC) workloads. Compute-optimized instances offer the highest performance per core and are built on architecture that utilizes features like non-uniform memory access (NUMA) for optimal, reliable, and uniform performance.
| Machine | Workloads |
|---|---|
| H4D machine series |
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| H3 machine series |
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| C2D machine series |
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| C2 machine series |
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The following machine series are available in this machine family:
- H4D instances are powered by Titanium and fifth generation AMD EPYC Turin processors which have a base frequency of 2.7 GHz and a maximum frequency of 4.1 GHz. H4D instances have 192 cores (vCPUs) and up to 1,488 GB of memory. H4D instances can be used with Local SSD storage and Cloud RDMA networking.
- H3 instances are powered by Titanium and two fourth generation Intel Xeon Scalable processors (code-named Sapphire Rapids) which have an all-core frequency of 3.0 GHz. H3 instances have 88 vCPUs and 352 GB of DDR5 memory.
- C2D instances run on the third generation AMD EPYC Milan processor and offer up to 3.5 GHz max boost frequency. C2D instances have flexible sizing between 2 to 112 vCPUs and 2 to 8 GB of memory per vCPU.
- C2 instances run on the second generation Intel Xeon Scalable processor (Cascade Lake) which offers up to 3.9 GHz sustained single-core max turbo frequency. C2 offers instances with 4 to 60 vCPUs and 4 GB of memory per vCPU.
H4D machine series
H4D instances are powered by the AMD EPYC Turin 5th Generation processors and Titanium offload processors.
H4D instances deliver high performance, low cost, and scalability for multi-node workloads. H4D instances are single-threaded and are optimized for tightly-coupled applications that scale across multiple nodes. Leveraging technologies like Titanium SSD, RDMA-enabled 200 Gbps networking and cluster management capabilities, these instances prioritize performance and workload-specific optimizations. Additionally, you can use Dynamic Workload Scheduler for scheduled or immediate cluster deployment, making H4D ideal for HPC bursty workload needs.
An H4D instance uses all the vCPUs on an entire host server. H4D instances can use the entire host network bandwidth and come with a default network bandwidth rate of up to 200 Gbps. However, the bandwidth from the instance to the internet is limited to 1 Gbps.
Simultaneous multithreading (SMT) is disabled for H4D instances and can't be enabled. There is also no overcommitting to ensure optimal performance consistency.
H4D instances are available on-demand, or with one- and three-year committed use discounts (CUDs). To compare these methods, see Compute Engine instances provisioning models.
H4D Limitations
The H4D machine series has the following restrictions:
- The H4D machine types are only available in a predefined machine type. Custom machine types aren't available.
- You can't use GPUs with H4D instances.
- Outbound data transfer is limited to 1 Gbps.
- You can't create machine images from H4D instances.
- H4D machine images can't be used to create disks.
- You can't share disks between instances, either in multi-writer mode or