# Lambda parameters for Amazon DynamoDB event source mappings
<a name="services-ddb-params"></a>

All Lambda event source types share the same [CreateEventSourceMapping](https://docs.aws.amazon.com/lambda/latest/api/API_CreateEventSourceMapping.html) and [UpdateEventSourceMapping](https://docs.aws.amazon.com/lambda/latest/api/API_UpdateEventSourceMapping.html) API operations. However, only some of the parameters apply to DynamoDB Streams.


| Parameter | Required | Default | Notes | 
| --- | --- | --- | --- | 
|  BatchSize  |  N  |  100  |  Maximum: 10,000  | 
|  BisectBatchOnFunctionError  |  N  |  false  | none  | 
|  DestinationConfig  |  N  | N/A  |  Standard Amazon SQS queue or standard Amazon SNS topic destination for discarded records  | 
|  Enabled  |  N  |  true  | none  | 
|  EventSourceArn  |  Y  | N/A |  ARN of the data stream or a stream consumer  | 
|  FilterCriteria  |  N  | N/A  |  [Control which events Lambda sends to your function](invocation-eventfiltering.md)  | 
|  FunctionName  |  Y  | N/A  | none  | 
|  FunctionResponseTypes  |  N  | N/A |  To let your function report specific failures in a batch, include the value `ReportBatchItemFailures` in `FunctionResponseTypes`. For more information, see [Configuring partial batch response with DynamoDB and Lambda](services-ddb-batchfailurereporting.md).  | 
|  MaximumBatchingWindowInSeconds  |  N  |  0  | none  | 
|  MaximumRecordAgeInSeconds  |  N  |  -1  |  -1 means infinite: failed records are retried until the record expires. The [data retention limit for DynamoDB Streams](https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Streams.html#Streams.DataRetention) is 24 hours. Minimum: -1 Maximum: 604,800  | 
|  MaximumRetryAttempts  |  N  |  -1  |  -1 means infinite: failed records are retried until the record expires Minimum: 0 Maximum: 10,000  | 
|  ParallelizationFactor  |  N  |  1  |  Maximum: 10  | 
|  StartingPosition  |  Y  | N/A  |  TRIM\$1HORIZON or LATEST  | 
|  TumblingWindowInSeconds  |  N  | N/A  |  Minimum: 0 Maximum: 900  |