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Use a Dedicated Headnode Instance for Management Services

In dedicated headnode mode, any management services (for example, the job manager or the file server) run on a separate instance called the headnode. The headnode does not host any workers. This approach is useful when workers run computations that use many system resources, such as memory, processor, network, or local storage. Using many system resources can negatively impact the performance of the job manager. In that case, if the job manager becomes unresponsive, then the MATLAB client can lose communication with the cluster.

In dedicated headnode mode, the job manager is optimized for the instance types that Cloud Center allows you to choose. A dedicated headnode adds an additional instance to your cluster, and so adds to your overall cost.

In dedicated headnode mode, the cluster machines are in the same availability zone, which improves the communication speed between the headnode and the workers. For instructions on enabling or disabling the dedicated headnode, see Create a Cloud Cluster.

Use a Shared Instance for Management Services

If you disable the dedicated headnode mode, any management services (for example, the job manager) run on one instance in your cluster, along with workers. Use this mode if you want to reduce the number of machines in your cluster by one. This mode uses the same machine type for the headnode and the workers.

For instructions on enabling or disabling the dedicated headnode, see Create a Cloud Cluster.

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