Considerations and limitations when using the Spark connector
The Spark connector supports a variety of ways to manage credentials, to configure security, and to connect with other AWS services. Get familiar with the recommendations in this list in order to configure a functional and resilient connection.
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We recommend that you activate SSL for the JDBC connection from Spark on Amazon EMR to Amazon Redshift.
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We recommend that you manage the credentials for the Amazon Redshift cluster in AWS Secrets Manager as a best practice. See Using AWS Secrets Manager to retrieve credentials for connecting to Amazon Redshift for an example.
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We recommend that you pass an IAM role with the parameter
aws_iam_rolefor the Amazon Redshift authentication parameter. -
The parameter
tempformatcurrently doesn't support the Parquet format. -
The
tempdirURI points to an Amazon S3 location. This temp directory isn't cleaned up automatically and therefore could add additional cost. -
Consider the following recommendations for Amazon Redshift:
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We recommend that you block public access to the Amazon Redshift cluster.
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We recommend that you turn on Amazon Redshift audit logging.
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We recommend turn on Amazon Redshift at-rest encryption.
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Consider the following recommendations for Amazon S3:
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We recommend blocking public access to Amazon S3 buckets.
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We recommend that you use Amazon S3 server-side encryption to encrypt the S3 buckets that you use.
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We recommend that you use Amazon S3 lifecycle policies to define the retention rules for the S3 bucket.
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Amazon EMR always verifies code imported from open-source into the image. For security, we don't support encoding AWS access keys in the
tempdirURI as an authentication method from Spark to Amazon S3.
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For more information on using the connector and its supported parameters, see the following resources:
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Amazon Redshift integration for Apache Spark in the Amazon Redshift Management Guide
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The
spark-redshiftcommunity repositoryon Github
