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Hello,
The discrepancy in storage size is likely due to:
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Glacier's Storage Calculation: Glacier calculates storage size based on the total amount of data uploaded, including metadata and chunked uploads. This can lead to a larger reported size.
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Multipart Uploads: The 512 MB multipart upload size setting can cause additional overhead, increasing the stored size.
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Versioning and Retention: If versioning is enabled, multiple versions of files are stored, contributing to the larger size.
To reduce the storage size:
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Verify Versioning Settings: Ensure you're not storing unnecessary file versions. Check your Glacier vault for multiple versions and clean up if needed.
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Optimize Multipart Upload Size: Consider increasing the multipart upload size to reduce overhead. This can minimize the space used by chunks and metadata.
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Run a Glacier Inventory Report: Generate an inventory report to identify the actual data stored and any potential issues.
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Consider Using S3 Lifecycle Policies: Automate the deletion of unnecessary data or transition to more cost-effective storage classes with lifecycle policies.
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Check for Duplicate or Unnecessary Files: Review and remove any duplicate or unnecessary files to reduce storage size.
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