Upgrade hardware size - Any downtime?

Will an upgrade in hardware size cause any downtime?

How many nodes do you have in the cluster?

I have one master and one replica and a voting node.

If this is an Elastic Cloud cluster you can increase size without downtime.

Yes, it's an Elastic cloud cluster.

On Elastic Cloud I believe changing size is always done by first adding the new nodes and then relocating the data before the old nodes are removed.

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