Throughput (RU/s) operations with Azure CLI for a database or graph for Azure Cosmos DB for MongoDB

  • Article

APPLIES TO: MongoDB

The script in this article creates a MongoDB database with shared throughput and collection with dedicated throughput, then updates the throughput for both. The script then migrates from standard to autoscale throughput then reads the value of the autoscale throughput after it has been migrated.

If you don't have an Azure trail subscription, create a trial subscription before you begin.

Prerequisites

You can use the local Azure CLI.

  • This article requires version 2.30 or later. Run az --version to find the version. If you need to install or upgrade, see Install Azure CLI.

    Note

    Before you can use Azure CLI in Microsoft Azure operated by 21Vianet, please run az cloud set -n AzureChinaCloud first to change the cloud environment. If you want to switch back to Azure Public Cloud, run az cloud set -n AzureCloud again.

Sample script

Sign in to Azure

Use the following script to sign in using a different subscription, replacing <Subscription ID> with your Azure Subscription ID. If you don't have an Azure trail subscription, create a trial subscription before you begin.

az cloud set -n AzureChinaCloud
az login

subscription="<subscriptionId>" # add subscription here

az account set -s $subscription # ...or use 'az login'

For more information, see set active subscription or log in.

Run the script

# Throughput operations for a MongoDB API database and collection

# Variable block
let "randomIdentifier=$RANDOM*$RANDOM"
location="chinaeast2"
resourceGroup="msdocs-cosmosdb-rg-$randomIdentifier"
tag="throughput-mongodb-cosmosdb"
account="msdocs-account-cosmos-$randomIdentifier" #needs to be lower case
database="msdocs-db-mongo-cosmos"
collection="collection1"
originalThroughput=400
updateThroughput=500

# Create a resource group
echo "Creating $resourceGroup in $location..."
az group create --name $resourceGroup --location "$location" --tags $tag

# Create a Cosmos account for MongoDB API
echo "Creating $account"
az cosmosdb create --name $account --resource-group $resourceGroup --kind MongoDB

# Create a MongoDB API database
echo "Creating $database with $originalThroughput"
az cosmosdb mongodb database create --account-name $account --resource-group $resourceGroup --name $database --throughput $originalThroughput

# Define a minimal index policy for the collection
printf '[ {"key": {"keys": ["_id"]}} ]' > idxpolicy-$randomIdentifier.json

# Create a MongoDB API collection
az cosmosdb mongodb collection create --account-name $account --resource-group $resourceGroup --database-name $database --name $collection --shard "user_id" --throughput $originalThroughput --idx @idxpolicy-$randomIdentifier.json

# Clean up temporary index policy file
rm -f "idxpolicy-$randomIdentifier.json"

# Throughput operations for MongoDB API database
#   Read the current throughput
#   Read the minimum throughput
#   Make sure the updated throughput is not less than the minimum
#   Update the throughput
#   Migrate between standard (manual) and autoscale throughput
#   Read the autoscale max throughput

# Retrieve the current provisioned database throughput
az cosmosdb mongodb database throughput show --resource-group $resourceGroup --account-name $account --name $database --query resource.throughput -o tsv

# Retrieve the minimum allowable database throughput
minimumThroughput=$(az cosmosdb mongodb database throughput show --resource-group $resourceGroup --account-name $account --name $database --query resource.minimumThroughput -o tsv)
echo $minimumThroughput

# Make sure the updated throughput is not less than the minimum allowed throughput
if [ $updateThroughput -lt $minimumThroughput ]; then
    updateThroughput=$minimumThroughput
fi

# Update database throughput
echo "Updating $database throughput to $updateThroughput"
az cosmosdb mongodb database throughput update --account-name $account --resource-group $resourceGroup --name $database --throughput $updateThroughput

# Migrate the database from standard (manual) throughput to autoscale throughput
az cosmosdb mongodb database throughput migrate --account-name $account --resource-group $resourceGroup --name $database --throughput-type 'autoscale'

# Retrieve current autoscale provisioned max database throughput
az cosmosdb mongodb database throughput show --account-name $account --resource-group $resourceGroup --name $database --query resource.autoscaleSettings.maxThroughput -o tsv

# Throughput operations for MongoDB API collection
#   Read the current throughput
#   Read the minimum throughput
#   Make sure the updated throughput is not less than the minimum
#   Update the throughput
#   Migrate between standard (manual) and autoscale throughput
#   Read the autoscale max throughput

# Retrieve the current provisioned collection throughput
az cosmosdb mongodb collection throughput show --account-name $account --resource-group $resourceGroup --database-name $database --name $collection --query resource.throughput -o tsv

# Retrieve the minimum allowable collection throughput
minimumThroughput=$(az cosmosdb mongodb collection throughput show --account-name $account --resource-group $resourceGroup --database-name $database --name $collection --query resource.minimumThroughput -o tsv)

echo $minimumThroughput

# Make sure the updated throughput is not less than the minimum allowed throughput
if [ $updateThroughput -lt $minimumThroughput ]; then
    updateThroughput=$minimumThroughput
fi

# Update collection throughput
echo "Updating collection throughput to $updateThroughput"
az cosmosdb mongodb collection throughput update --account-name $account --resource-group $resourceGroup --database-name $database --name $collection --throughput $updateThroughput

# Migrate the collection from standard (manual) throughput to autoscale throughput
az cosmosdb mongodb collection throughput migrate --account-name $account --resource-group $resourceGroup --database-name $database --name $collection --throughput 'autoscale'

# Retrieve the current autoscale provisioned max collection throughput
az cosmosdb mongodb collection throughput show --account-name $account --resource-group $resourceGroup --database-name $database --name $collection --query resource.autoscaleSettings.maxThroughput -o tsv

Clean up resources

Use the following command to remove the resource group and all resources associated with it using the az group delete command - unless you have an ongoing need for these resources. Some of these resources may take a while to create, as well as to delete.

az group delete --name $resourceGroup

Sample reference

This script uses the following commands. Each command in the table links to command specific documentation.

Command Notes
az group create Creates a resource group in which all resources are stored.
az cosmosdb create Creates an Azure Cosmos DB account.
az cosmosdb mongodb database create Creates an Azure Cosmos DB MongoDB API database.
az cosmosdb mongodb collection create Creates an Azure Cosmos DB MongoDB API collection.
az cosmosdb mongodb database throughput update Update RUs for an Azure Cosmos DB MongoDB API database.
az cosmosdb mongodb collection throughput update Update RUs for an Azure Cosmos DB MongoDB API collection.
az cosmosdb mongodb database throughput migrate Migrate throughput for a database.
az cosmosdb mongodb collection throughput migrate Migrate throughput for a collection.
az group delete Deletes a resource group including all nested resources.

Next steps

For more information on the Azure Cosmos DB CLI, see Azure Cosmos DB CLI documentation.