Tutorial: Creating a Global Table - Amazon DynamoDB

Tutorial: Creating a Global Table

There are two versions of DynamoDB global tables available: Version 2019.11.21 (Current) and Version 2017.11.29. To find out which version you are using, see Determine Version.

This section describes how to create a global table using the Amazon DynamoDB console or the AWS Command Line Interface (AWS CLI).

Creating a Global Table (Console)

Follow these steps to create a global table using the console. The following example creates a global table with replica tables in United States and Europe.

  1. Open the DynamoDB console at https://console.aws.amazon.com/dynamodb/home. For this example, choose the us-east-2 (US East Ohio) Region.

  2. In the navigation pane on the left side of the console, choose Tables.

  3. Choose Create Table.

    For Table name, enter Music.

    For Primary key enter Artist. Choose Add sort key, and enter SongTitle. (Artist and SongTitle should both be strings.)

    To create the table, choose Create. This table serves as the first replica table in a new global table. It is the prototype for other replica tables that you add later.

  4. Choose the Global Tables tab, and then choose Enable streams. Keep the View type at its default value (New and old images).

    
                        Console screenshot showing enabling streams.
  5. Choose Add region.

    
                        Console screenshot showing enabling streams.
  6. In Region, choose US West (Oregon).

    The console checks to ensure that a table with the same name doesn't exist in the selected Region. If a table with the same name does exist, you must delete the existing table before you can create a new replica table in that Region.

    Choose Create Replica, this starts the table creation process in US West (Oregon).

    
                        Console screenshot showing enabling streams.

    The Global Table tab for the selected table (and for any other replica tables) shows that the table has been replicated in multiple Regions.

  7. Now add another Region so that your global table is replicated and synchronized across the United States and Europe. To do this, repeat step 5, but this time, specify EU (Frankfurt) instead of US West (Oregon).

  8. You should still be using the AWS Management Console in the us-east-2 (US East Ohio) Region. For the Music table, choose the Items tab, and then choose Create Item. For Artist, enter item_1. For SongTitle, enter Song Value 1. To write the item, choose Save.

    After a short time, the item is replicated across all three Regions of your global table. To verify this, in the console, on the Region selector in the upper-right corner, choose Europe (Frankfurt). The Music table in Europe (Frankfurt) should contain the new item.

    Repeat this for US West (Oregon).

Creating a Global Table (AWS CLI)

Follow these steps to create a global table Music using the AWS CLI. The following example creates a global table, with replica tables in the United States and in Europe.

  1. Create a new table (Music) in US East (Ohio), with DynamoDB Streams enabled (NEW_AND_OLD_IMAGES).

    aws dynamodb create-table \ --table-name Music \ --attribute-definitions \ AttributeName=Artist,AttributeType=S \ AttributeName=SongTitle,AttributeType=S \ --key-schema \ AttributeName=Artist,KeyType=HASH \ AttributeName=SongTitle,KeyType=RANGE \ --billing-mode PAY_PER_REQUEST \ --stream-specification StreamEnabled=true,StreamViewType=NEW_AND_OLD_IMAGES \ --region us-east-2
  2. Create an identical Music table in US East (N. Virginia).

    aws dynamodb update-table --table-name Music --cli-input-json \ '{ "ReplicaUpdates": [ { "Create": { "RegionName": "us-east-1" } } ] }'
  3. Repeat step 2 to create a table in Europe (Ireland) (eu-west-1).

  4. You can view the list of replicas created using describe-table.

    aws dynamodb describe-table --table-name Music --region us-east-2
  5. To verify that replication is working, add a new item to the Music table in US East (Ohio).

    aws dynamodb put-item \ --table-name Music \ --item '{"Artist": {"S":"item_1"},"SongTitle": {"S":"Song Value 1"}}' \ --region us-east-2
  6. Wait for a few seconds, and then check to see whether the item has been successfully replicated to US East (N. Virginia) and Europe (Ireland).

    aws dynamodb get-item \ --table-name Music \ --key '{"Artist": {"S":"item_1"},"SongTitle": {"S":"Song Value 1"}}' \ --region us-east-1
    aws dynamodb get-item \ --table-name Music \ --key '{"Artist": {"S":"item_1"},"SongTitle": {"S":"Song Value 1"}}' \ --region eu-west-1
  7. Delete the replica table in Europe (Ireland) Region.

    aws dynamodb update-table --table-name Music --cli-input-json \ '{ "ReplicaUpdates": [ { "Delete": { "RegionName": "eu-west-1" } } ] }'

Creating a Global Table (Java)

The following java code sample, create a Music table in Europe (Ireland) region then creates a replica in Asia Pacific (Seoul) region.

package com.amazonaws.codesamples.gtv2 import java.util.logging.Logger; import com.amazonaws.auth.profile.ProfileCredentialsProvider; import com.amazonaws.regions.Regions; import com.amazonaws.services.dynamodbv2.AmazonDynamoDB; import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClientBuilder; import com.amazonaws.services.dynamodbv2.model.AmazonDynamoDBException; import com.amazonaws.services.dynamodbv2.model.AttributeDefinition; import com.amazonaws.services.dynamodbv2.model.BillingMode; import com.amazonaws.services.dynamodbv2.model.CreateReplicationGroupMemberAction; import com.amazonaws.services.dynamodbv2.model.CreateTableRequest; import com.amazonaws.services.dynamodbv2.model.DescribeTableRequest; import com.amazonaws.services.dynamodbv2.model.GlobalSecondaryIndex; import com.amazonaws.services.dynamodbv2.model.KeySchemaElement; import com.amazonaws.services.dynamodbv2.model.KeyType; import com.amazonaws.services.dynamodbv2.model.Projection; import com.amazonaws.services.dynamodbv2.model.ProjectionType; import com.amazonaws.services.dynamodbv2.model.ProvisionedThroughput; import com.amazonaws.services.dynamodbv2.model.ProvisionedThroughputOverride; import com.amazonaws.services.dynamodbv2.model.ReplicaGlobalSecondaryIndex; import com.amazonaws.services.dynamodbv2.model.ReplicationGroupUpdate; import com.amazonaws.services.dynamodbv2.model.ScalarAttributeType; import com.amazonaws.services.dynamodbv2.model.StreamSpecification; import com.amazonaws.services.dynamodbv2.model.StreamViewType; import com.amazonaws.services.dynamodbv2.model.UpdateTableRequest; import com.amazonaws.waiters.WaiterParameters; public class App { private final static Logger LOGGER = Logger.getLogger(Logger.GLOBAL_LOGGER_NAME); public static void main( String[] args ) { String tableName = "Music"; String indexName = "index1"; Regions calledRegion = Regions.EU_WEST_1; Regions destRegion = Regions.AP_NORTHEAST_2; AmazonDynamoDB ddbClient = AmazonDynamoDBClientBuilder.standard() .withCredentials(new ProfileCredentialsProvider("default")) .withRegion(calledRegion) .build(); LOGGER.info("Creating a regional table - TableName: " + tableName +", IndexName: " + indexName + " ....."); ddbClient.createTable(new CreateTableRequest() .withTableName(tableName) .withAttributeDefinitions( new AttributeDefinition() .withAttributeName("Artist").withAttributeType(ScalarAttributeType.S), new AttributeDefinition() .withAttributeName("SongTitle").withAttributeType(ScalarAttributeType.S)) .withKeySchema( new KeySchemaElement().withAttributeName("Artist").withKeyType(KeyType.HASH), new KeySchemaElement().withAttributeName("SongTitle").withKeyType(KeyType.RANGE)) .withBillingMode(BillingMode.PAY_PER_REQUEST) .withGlobalSecondaryIndexes(new GlobalSecondaryIndex() .withIndexName(indexName) .withKeySchema(new KeySchemaElement() .withAttributeName("SongTitle") .withKeyType(KeyType.HASH)) .withProjection(new Projection().withProjectionType(ProjectionType.ALL))) .withStreamSpecification(new StreamSpecification() .withStreamEnabled(true) .withStreamViewType(StreamViewType.NEW_AND_OLD_IMAGES))); LOGGER.info("Waiting for ACTIVE table status ....."); ddbClient.waiters().tableExists().run(new WaiterParameters<>(new DescribeTableRequest(tableName))); LOGGER.info("Testing parameters for adding a new Replica in " + destRegion + " ....."); CreateReplicationGroupMemberAction createReplicaAction = new CreateReplicationGroupMemberAction() .withRegionName(destRegion.getName()) .withGlobalSecondaryIndexes(new ReplicaGlobalSecondaryIndex() .withIndexName(indexName) .withProvisionedThroughputOverride(new ProvisionedThroughputOverride() .withReadCapacityUnits(15L))); ddbClient.updateTable(new UpdateTableRequest() .withTableName(tableName) .withReplicaUpdates(new ReplicationGroupUpdate() .withCreate(createReplicaAction.withKMSMasterKeyId(null)))); } }