Manage read replicas

Console

1. Go to the Memorystore for Redispage in the Google Cloud console.

   Memorystore for Redis

2. Click Create Instance.

   

3. Follow the instructions at Create a Redis instance on a VPC network , but return to these instructions when selecting Tier.

4. Choose Standardtier.

5. Under the Configure read replicasdropdown, select your desired number of read replicas.

6. Return to the Create a Redis instance on a VPC network instructions for additional guidance on other Memorystore configurations, or click the Createbutton.

gcloud

Enter the following command, replacing variables with appropriate values:

gcloud redis instances create instance-id 
--size= size 
--region= region-id 
--replica-count= count 
--read-replicas-mode=read-replicas-enabled --tier=standard

Where:

• count is a value from 1 to 5. This sets the number of read replicas.

Console

1. Go to the Memorystore for Redispage in the Google Cloud console.

   Memorystore for Redis

2. Click the ID of the instance.

3. Under the Configurationsection, next to Read Replicas, click ENABLE.

4. (Optional)Specify a custom IP range

   • If your instance uses the direct peering connection mode , you can enter a specific CIDR range with a block size of at least /28 , as long as it doesn't overlap with any other existing ranges. For example, you could enter 10.100.0.0/28 .

   • If your instance uses the private services access connection mode , you can choose an existing allocated range of size /28 from the dropdown menu. For instructions on allocating an IP address range viewable from the dropdown menu, see Creating an IP allocation .

5. Click Enable Read Replicas.

gcloud

To enable read replicas for your instance, enter the following command, replacing variables with appropriate values.

gcloud redis instances update INSTANCE_ID 
--read-replicas-mode=READ_REPLICAS_ENABLED --secondary-ip-range= SECONDARY_RANGE 

Where:

• INSTANCE_ID is the ID of the instance for which you're enabling read replicas.
• SECONDARY_RANGE is one of the following options:
  • auto . auto is supported for both networking connection modes.
  • If your instance uses the direct peering connection mode you must provide a valid CIDR IP address range of size /28 . For example, --secondary-ip-range=10.100.0.0/28 .
  • If your instance uses the private services access connection mode you must provide the name of an allocated range of size /28 . For example, --secondary-ip-range=my-secondary-range-memorystore .

Console

1. Go to the Memorystore for Redis page in the Google Cloud console.
   Memorystore for Redis
2. Click the Instance ID of the instance to which you want to add/remove replica nodes.
3. Click Edit.
4. Under Configure read replicas, enter your desired number of replicas.
5. Click Save.

gcloud

Enter the following command, replacing variables with appropriate values:

gcloud redis instances update instance-id 
--region= region-id 
--replica-count= count 

Where:

• count is a value from 1 to 5. This sets the number of read replicas.

Console

1. Go to the Memorystore for Redis page in the Google Cloud console.
   Memorystore for Redis
2. Click the Instance ID of the instance you want to resize.
3. Click Edit.
4. Under Capacity, enter a new size in the field to update the instance's capacity.
5. Click Save.

gcloud

Enter the following command, replacing variables with appropriate values:

gcloud redis instances update instance-id 
--region= region-id 
--size= size 

Where:

• size is the size of each Redis node in your instance, including the primary node. For example, if you have a read replica enabled instance with six nodes (including the primary node) with --size=10 , your total instance size is 60 GiB.