Add a mongos node

Billing

For more information, see Configuration change fees.

Precautions

• If the minor version of a sharded cluster instance expires or is not included in the maintenance list, ApsaraDB for MongoDB automatically updates the minor version of the instance to the latest version during a configuration change. This ensures that the sharded cluster instance can provide higher performance and higher stability.
• When mongos nodes are added, no transient connections occur and your business continues to run as expected.
• Typically, mongos nodes are added within 5 minutes. The time it takes to add mongos nodes is not dependent on the number of mongos nodes being added.

Procedure

1. Log on to the ApsaraDB for MongoDB console.
2. In the upper-left corner of the page, select the resource group and the region of the target instance.
3. In the left-side navigation pane, click Sharded Cluster Instances.
4. Find the target instance and click its ID.
5. In the Mongos List section of the Basic Information page, click Add Mongos.
   
6. In the Add Mongos panel, set the following parameters.

   Parameter	Description
   Instance Specifications	The specifications of the mongos node that you want to add. For more information about the supported specifications of mongos nodes, see Instance types.
   Quantity	The number of mongos nodes that you want to add. Note A maximum of 32 mongos nodes can be added to each sharded cluster instance. If the sharded cluster instance already has three mongos nodes and you want to add more mongos nodes, you can add a maximum of 29 mongos nodes to the sharded cluster instance. If you need more than 32 mongos nodes in a sharded cluster instance, submit a ticket.

7. Perform the corresponding operations based on the selected billing method:
   • Pay-as-you-go: Click Pay Now. Then, the system automatically collects the amount in the next hour.
   • Subscription: Click Pay Now. Then, the system automatically collects the amount.
   When nodes are being added to the sharded cluster instance, the instance is in the Creating Node state. Nodes are added to the instance when the state of the instance changes to Running.

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