Azure Data Explorer: effective costs different than pricing calculator

Question

Dear community

I have created an Azure Data Explorer cluster, as a dev/test environment. The pricing calculator was estimating a certain amount for this setup but thereal cost is higher than that.

Looking into the details it seems that the cluster has been setup using, for the D2 v2 VM for the data management instead of a D1 v2 VM, where the former costs exactly double the cost of the latter.

My question is, as for this test I do not need the extra power provided by D2 v2, is there a way to scale it down?

Thanks in advance,

Matteo

Screenshot 2024-04-07 at 10.47.59.png

Answer 1

Hello @Matteo,

welcome to this moderated Azure community forum.

The costs of an Azure Data Explorer is built up by several components:

• Engine instances
• Data management instances
• Storage and transactions
• Networking
• Azure Data Explorer markup

As you can see, there are two 'instances'.

The engine is the cluster you configure yourself. These are used for the (query) compute.

The Data management instances are the internal VMs, or internal load balancers (engine and data management) for ingestion and optimizing the storage:

The (Data management) service ... are automatically configured and managed based on the engine instance size.

So, you are (only) in control for the Compute engine instances.

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