DynamoDB Sources in Data Synchronization Tasks
When you configure a data synchronization task to use a DynamoDB source, you can configure the source properties.
The source properties appear on the Source page of the Data Synchronization Task wizard when you specify a DynamoDB connection.
The following table describes the DynamoDB source properties:
Source Property | Description |
|---|
Connection Type | Name of the source connection. |
Source Type | Source type. Select Single for a single source object. |
Source Object | Select the source object for the task. |
You can also configure advanced source properties when you schedule the data synchronization task. Advanced source properties appear on the Schedule page of the Data Synchronization Task wizard.
The following table describes the DynamoDB advanced source properties:
Advanced Source Property | Description |
|---|
Row Count | The maximum number of rows to read from the DynamoDB table. |
Read Capacity Unit | The percentage increment of the read capacity unit. For DynamoDB Connector, a unit of read capacity represents two eventually consistent reads per second for items as large as 4 KB. |
Read Capacity Unit
When you create or update a table, you can configure the provisioned throughput capacity using the read capacity unit for read operations. As your application data and access requirements change, you can increase or decrease your provisioned throughput by updating the read capacity unit.
DynamoDB Connector supports eventually consistent reads and not strongly consistent reads. For DynamoDB Connector, the read capacity unit represents the number of reads per second of items up to 8 KB in size per second. For example, if you specify 10 read capacity units, you are requesting a throughput of 10 eventually consistent reads per second of 8 KB for that table.
To modify the read capacity unit, specify a percentage increment of the read capacity unit when you configure the advanced source properties. For example, if the existing read capacity unit is 100, you can read 100 *8 KB of data per second from a table. To increase the number of reads by 20%, specify a value of 20 in the Read Capacity Unit field. You can now read 120 * 8 KB of data per second, which is 20% of existing unit of read capacity plus existing unit of read capacity.