AWS CLI Command Reference

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[ aws . dynamodbstreams ]

get-shard-iterator

Description

Returns a shard iterator. A shard iterator provides information about how to retrieve the stream records from within a shard. Use the shard iterator in a subsequent GetRecords request to read the stream records from the shard.

Note

A shard iterator expires 15 minutes after it is returned to the requester.

See also: AWS API Documentation

Synopsis

  get-shard-iterator
--stream-arn <value>
--shard-id <value>
--shard-iterator-type <value>
[--sequence-number <value>]
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]
[--debug]
[--endpoint-url <value>]
[--no-verify-ssl]
[--no-paginate]
[--output <value>]
[--query <value>]
[--profile <value>]
[--region <value>]
[--version <value>]
[--color <value>]
[--no-sign-request]
[--ca-bundle <value>]
[--cli-read-timeout <value>]
[--cli-connect-timeout <value>]

Options

--stream-arn (string)

The Amazon Resource Name (ARN) for the stream.

--shard-id (string)

The identifier of the shard. The iterator will be returned for this shard ID.

--shard-iterator-type (string)

Determines how the shard iterator is used to start reading stream records from the shard:

  • AT_SEQUENCE_NUMBER - Start reading exactly from the position denoted by a specific sequence number.
  • AFTER_SEQUENCE_NUMBER - Start reading right after the position denoted by a specific sequence number.
  • TRIM_HORIZON - Start reading at the last (untrimmed) stream record, which is the oldest record in the shard. In DynamoDB Streams, there is a 24 hour limit on data retention. Stream records whose age exceeds this limit are subject to removal (trimming) from the stream.
  • LATEST - Start reading just after the most recent stream record in the shard, so that you always read the most recent data in the shard.

Possible values:

  • TRIM_HORIZON
  • LATEST
  • AT_SEQUENCE_NUMBER
  • AFTER_SEQUENCE_NUMBER

--sequence-number (string)

The sequence number of a stream record in the shard from which to start reading.

--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

Global Options

--debug (boolean)

Turn on debug logging.

--endpoint-url (string)

Override command's default URL with the given URL.

--no-verify-ssl (boolean)

By default, the AWS CLI uses SSL when communicating with AWS services. For each SSL connection, the AWS CLI will verify SSL certificates. This option overrides the default behavior of verifying SSL certificates.

--no-paginate (boolean)

Disable automatic pagination.

--output (string)

The formatting style for command output.

  • json
  • text
  • table

--query (string)

A JMESPath query to use in filtering the response data.

--profile (string)

Use a specific profile from your credential file.

--region (string)

The region to use. Overrides config/env settings.

--version (string)

Display the version of this tool.

--color (string)

Turn on/off color output.

  • on
  • off
  • auto

--no-sign-request (boolean)

Do not sign requests. Credentials will not be loaded if this argument is provided.

--ca-bundle (string)

The CA certificate bundle to use when verifying SSL certificates. Overrides config/env settings.

--cli-read-timeout (int)

The maximum socket read time in seconds. If the value is set to 0, the socket read will be blocking and not timeout. The default value is 60 seconds.

--cli-connect-timeout (int)

The maximum socket connect time in seconds. If the value is set to 0, the socket connect will be blocking and not timeout. The default value is 60 seconds.

Examples

Note

To use the following examples, you must have the AWS CLI installed and configured. See the Getting started guide in the AWS CLI User Guide for more information.

Unless otherwise stated, all examples have unix-like quotation rules. These examples will need to be adapted to your terminal's quoting rules. See Using quotation marks with strings in the AWS CLI User Guide .

To get a shard iterator

The following get-shard-iterator command retrieves a shard iterator for the specified shard.

aws dynamodbstreams get-shard-iterator \
    --stream-arn arn:aws:dynamodb:us-west-1:12356789012:table/Music/stream/2019-10-22T18:02:01.576 \
    --shard-id shardId-00000001571780995058-40810d86 \
    --shard-iterator-type LATEST

Output:

{
    "ShardIterator": "arn:aws:dynamodb:us-west-1:123456789012:table/Music/stream/2019-10-22T18:02:01.576|1|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"
}

For more information, see Capturing Table Activity with DynamoDB Streams in the Amazon DynamoDB Developer Guide.

Output

ShardIterator -> (string)

The position in the shard from which to start reading stream records sequentially. A shard iterator specifies this position using the sequence number of a stream record in a shard.