---
title: "a. Create a Cluster"
weight: 51
tags: ["tutorial", "cloud9", "ParallelCluster"]
---

![HPC6a Instance](/images/pcluster/hpc6a.png)

In this section we're going to use ParallelCluster UI to create a cluster from a sample template we've provided.

If you're doing this workshop as part of an AWS Event, you'll use the [c6i](https://aws.amazon.com/ec2/instance-types/c6i/) instance. This is an Intel Cascade Lake based instance with 64 physical cores and 256 GB of memory.

If you're doing this workshop in your own account, you'll use the [hpc6a](https://aws.amazon.com/ec2/instance-types/hpc6/) instance, an AMD EPYC Milan based instance designed specifically for tightly coupled HPC style workloads.

The instances have the following specs:

|  Instance Size | Cores | Memory (GiB) | EFA Network Bandwidth (Gbps) | Network Bandwidth (Gbps)* | On-Demand Price |
|:--------------:|:-----:|:------------:|:----------------------------:|:-------------------------:|-----------------|
| hpc6a.48xlarge |   96  |      384     |              100             |             25            | $2.88           |
| c6i.32xlarge |   64  |      256     |              50             |             50            | $5.44           |

1. Click **Create Cluster** Button

2. Name the cluster **hpc-cluster** and select **Template**. On the next step you'll be prompted to provide a file, download the template linked below and select that when prompted:

{{% button href="/template/cluster-config-hpc6a.yml" icon="fas fa-save" %}}Download Template (Your Account){{% /button %}}
{{% button href="/template/cluster-config-c6i.yml" icon="fas fa-save" %}}Download Template (AWS Event){{% /button %}}

![Cluster Wizard](/images/pcluster/pcmanager-1.png)

On the next few screens, we'll modify the account specific components and leave the rest as specified by the template.

3. Select a **VPC** from your account

![Cluster Wizard](/images/pcluster/pcmanager-2.png)

4. Select a **Subnet**, ensuring the subnet is from the Availability Zone ID **use2-az2** (if using HPC6a), and select a **Keypair** from your account (optional)

![Cluster Wizard](/images/pcluster/pcmanager-3.png)

4. Select the same **Subnet** from the previous step

![Cluster Wizard](/images/pcluster/pcmanager-4.png)

5. Click **Dry Run** to confirm the setup and then click **Create**

![Cluster Wizard](/images/pcluster/pcmanager-5.png)