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Amazon DynamoDB
Developer Guide (API Version 2012-08-10)

Setting Up DynamoDB Local (Downloadable Version)

The downloadable version of DynamoDB lets you write and test applications without accessing the DynamoDB web service. Instead, the database is self-contained on your computer. When you're ready to deploy your application in production, you can make a few minor changes to the code so that it uses the DynamoDB web service.

Having this local version helps you save on provisioned throughput, data storage, and data transfer fees. In addition, you don't need an Internet connection while you're developing your application.

Downloading and Running DynamoDB on Your Computer

The downloadable version of DynamoDB is provided as an executable .jar file. The application runs on Windows, Linux, macOS X, and other platforms that support Java.

Follow these steps to set up and run DynamoDB on your computer:

  1. Download DynamoDB for free using one of the following links:

    Region Download Links Checksums

    Asia Pacific (Mumbai) Region

    .tar.gz | .zip

    .tar.gz.sha256 | .zip.sha256

    Asia Pacific (Singapore) Region

    .tar.gz | .zip

    .tar.gz.sha256 | .zip.sha256

    Asia Pacific (Tokyo) Region

    .tar.gz | .zip

    .tar.gz.sha256 | .zip.sha256

    EU (Frankfurt) Region

    .tar.gz | .zip

    .tar.gz.sha256 | .zip.sha256

    South America (São Paulo) Region

    .tar.gz | .zip

    .tar.gz.sha256 | .zip.sha256

    US West (Oregon) Region

    .tar.gz | .zip

    .tar.gz.sha256 | .zip.sha256

    Downloadable DynamoDB is available on Apache Maven. For more information, see DynamoDB (Downloadable Version) and Apache Maven, later in this topic. DynamoDB is also available as part of the AWS Toolkit for Eclipse. For more information, see AWS Toolkit For Eclipse.

    Important

    To run DynamoDB on your computer, you must have the Java Runtime Environment (JRE) version 6.x or newer. The application doesn't run on older JRE versions.

  2. After you download the archive, extract the contents and copy the extracted directory to a location of your choice.

  3. To start DynamoDB on your computer, open a command prompt window, navigate to the directory where you extracted DynamoDBLocal.jar, and type the following command:

    Copy
    java -Djava.library.path=./DynamoDBLocal_lib -jar DynamoDBLocal.jar -sharedDb

    Note

    DynamoDB processes incoming requests until you stop it. To stop DynamoDB, type Ctrl+C at the command prompt.

    DynamoDB uses port 8000 by default. If port 8000 is unavailable, this command throws an exception. For a complete list of DynamoDB runtime options, including -port , type this command:

    java -Djava.library.path=./DynamoDBLocal_lib -jar DynamoDBLocal.jar -help

After completing these steps, you can start writing applications.

DynamoDB (Downloadable Version) and Apache Maven

To use DynamoDB in your application as a dependency:

  1. Download and install Apache Maven. For more information, see Downloading Apache Maven and Installing Apache Maven.

  2. Add the DynamoDB Maven repository to your application's Project Object Model (POM) file:

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    <!--Dependency:--> <dependencies> <dependency> <groupId>com.amazonaws</groupId> <artifactId>DynamoDBLocal</artifactId> <version>[1.11,2.0)</version> </dependency> </dependencies> <!--Custom repository:--> <repositories> <repository> <id>dynamodb-local-oregon</id> <name>DynamoDB Local Release Repository</name> <url>https://s3-us-west-2.amazonaws.com/dynamodb-local/release</url> </repository> </repositories>

    Note

    Alternatively, you can use one of the following repository URLs, depending on your region:

    id Repository URL

    dynamodb-local-mumbai

    https://s3.ap-south-1.amazonaws.com/dynamodb-local-mumbai/release

    dynamodb-local-singapore

    https://s3-ap-southeast-1.amazonaws.com/dynamodb-local-singapore/release

    dynamodb-local-tokyo

    https://s3-ap-northeast-1.amazonaws.com/dynamodb-local-tokyo/release

    dynamodb-local-frankfurt

    https://s3.eu-central-1.amazonaws.com/dynamodb-local-frankfurt/release

    dynamodb-local-sao-paulo

    https://s3-sa-east-1.amazonaws.com/dynamodb-local-sao-paulo/release

The aws-dynamodb-examples repository in GitHub contains examples for starting and stopping DynamoDB Local inside a Java program and using DynamoDB Local in JUnit tests.

Command Line Options

You can use the following command line options with the downloadable version of DynamoDB:

  • -cors value — Enables support for cross-origin resource sharing (CORS) for JavaScript. You must provide a comma-separated "allow" list of specific domains. The default setting for -cors is an asterisk (*), which allows public access.

  • -dbPath value — The directory where DynamoDB writes its database file. If you don't specify this option, the file is written to the current directory. You can't specify both -dbPath and -inMemory at once.

  • -delayTransientStatuses — Causes DynamoDB to introduce delays for certain operations. DynamoDB (Downloadable Version) can perform some tasks almost instantaneously, such as create/update/delete operations on tables and indexes. However, the DynamoDB service requires more time for these tasks. Setting this parameter helps DynamoDB running on your computer simulate the behavior of the DynamoDB web service more closely. (Currently, this parameter introduces delays only for global secondary indexes that are in either CREATING or DELETING status.)

  • -help — Prints a usage summary and options.

  • -inMemory — DynamoDB runs in memory instead of using a database file. When you stop DynamoDB, none of the data is saved. You can't specify both -dbPath and -inMemory at once.

  • -optimizeDbBeforeStartup — Optimizes the underlying database tables before starting DynamoDB on your computer. You also must specify -dbPath when you use this parameter.

  • -port value — The port number that DynamoDB uses to communicate with your application. If you don't specify this option, the default port is 8000.

    Note

    DynamoDB uses port 8000 by default. If port 8000 is unavailable, this command throws an exception. You can use the -port option to specify a different port number. For a complete list of DynamoDB runtime options, including -port , type this command:

    java -Djava.library.path=./DynamoDBLocal_lib -jar DynamoDBLocal.jar -help

  • -sharedDb — DynamoDB uses a single database file instead of separate files for each credential and region. If you specify -sharedDb, all DynamoDB clients interact with the same set of tables regardless of their region and credential configuration.