# Create a placement group for your EC2 instances
<a name="create-placement-group"></a>

You can use a placement group to control the placement of instances relative to each other. After you create a placement group, you can launch instances in the placement group.

**Limitation**  
You can create a maximum of 500 placement groups per Region.

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#### [ Console ]

**To create a placement group**

1. Open the Amazon EC2 console at [https://console.aws.amazon.com/ec2/](https://console.aws.amazon.com/ec2/).

1. In the navigation pane, choose **Placement Groups**.

1. Choose **Create placement group**.

1. Specify a name for the group.

1. Choose the placement strategy for the group: **Cluster**, **Spread**, or **Partition**.

   If you chose **Spread**, you must choose the spread level: **Rack** or **Host**.

   If you chose **Partition**, you must enter the number of partitions for the group.

1. (Optional) To add a tag, choose **Add new tag**, and then enter a key and value.

1. Choose **Create group**.

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#### [ AWS CLI ]

Use the [create-placement-group](https://docs.aws.amazon.com/cli/latest/reference/ec2/create-placement-group.html) command.

**To create a cluster placement group**  
The following example creates a placement group that uses the `cluster` placement strategy, and it applies a tag with a key of `purpose` and a value of `production`.

```
aws ec2 create-placement-group \
    --group-name my-cluster \
    --strategy cluster \
    --tag-specifications 'ResourceType=placement-group,Tags={Key=purpose,Value=production}'
```

**To create a partition placement group**  
The following example creates a placement group that uses the `partition` placement strategy, and specifies the five partitions using the `--partition-count` parameter.

```
aws ec2 create-placement-group \
    --group-name HDFS-Group-A \
    --strategy partition \
    --partition-count 5
```

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#### [ PowerShell ]

Use the [New-EC2PlacementGroup](https://docs.aws.amazon.com/powershell/latest/reference/items/New-EC2PlacementGroup.html) cmdlet.

**To create a cluster placement group**  
The following example creates a cluster placement group.

```
New-EC2PlacementGroup `
    -GroupName my-placement-group `
    -Strategy cluster
```

**To create a partition placement group**  
The following example creates a partition placement group.

```
New-EC2PlacementGroup `
    -GroupName my-placement-group `
    -Strategy partition `
    -PartitionCount 5
```

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