AWS Dynamo Batch Get Item

Rather than use Scan (which gives you paginated results, forcing you to essentially check every page), another option is to queue individual get_items as a batch operation and then send it:

    $dynamodb = new AmazonDynamoDB();
    $queue = new CFBatchRequest();
    foreach ($aws_ids as $aws_id)
    {
        self::$dynamodb->batch($queue)->query(array(
            'TableName' => "tablename",
            'HashKeyValue' => array( AmazonDynamoDB::TYPE_STRING => $aws_id ),
            //'AttributesToGet' => array('field1','fiedl2')
            //'Limit' => 1
        ));
    }
    $responses = $dynamodb->batch($queue)->send();

The response will be an array of what appears to be the same response type you would get from an individual request.