Pricing
Data ingestion and archival charges for vended logs apply when you publish flow logs.
For more information about pricing when publishing vended logs, open Amazon CloudWatch Pricing
To track charges from publishing flow logs, you can apply cost allocation tags to your destination resource. Thereafter, your Amazon cost allocation report includes usage and costs aggregated by these tags. You can apply tags that represent business categories (such as cost centers, application names, or owners) to organize your costs. For more information, see the following:
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Using Cost Allocation Tags in the Amazon Billing User Guide
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Tag log groups in Amazon CloudWatch Logs in the Amazon CloudWatch Logs User Guide
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Using cost allocation S3 bucket tags in the Amazon Simple Storage Service User Guide
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Tagging Your Delivery Streams in the Amazon Data Firehose Developer Guide