Credit: Amazon
Amazon Web Services (AWS) has announced two major enhancements for Amazon S3 Tables: a new Intelligent-Tiering storage class that automatically optimizes data storage costs, and built-in replication support to maintain synchronized Apache Iceberg table replicas across Regions and accounts. Both features are available today in all Regions where S3 Tables are supported.
Automatic Cost Optimization with Intelligent-Tiering
Organizations working with large Iceberg-based datasets often struggle with manually managing storage cost as data ages. The new S3 Tables Intelligent-Tiering storage class addresses this by automatically placing files into the most cost-efficient access tier based on observed access patterns.
Three Low-Latency Tiers
Frequent Access – Ideal for active datasets
Infrequent Access – ~40% cheaper than Frequent Access
Archive Instant Access – ~68% cheaper than Infrequent Access
How It Works
After 30 days of no access, files move to Infrequent Access
After 90 days of no access, they shift to Archive Instant Access
Transitioning occurs automatically, with no changes required in applications
Table maintenance tasks (snapshot expiration, compaction, cleanup) operate normally without affecting tier transitions
Compaction is optimized for cost: it only processes data in the Frequent Access tier, avoiding expensive reads from colder tiers.
Configuration
Existing tables continue using Standard storage by default
New tables can specify Intelligent-Tiering or inherit the storage class from the bucket default
Admins can set Intelligent-Tiering as the bucket-level default for all new S3 Tables
Cross-Region and Cross-Account Replication for S3 Tables
AWS also introduced native replication for Amazon S3 Tables—removing the need to manually build complex synchronization systems for Iceberg metadata and data files.
Key Capabilities
Create read-only replica tables in another Region or account
Maintain snapshot lineage and chronological update order
Automatically replicate table updates and object changes
Enable global read access for distributed teams
Support compliance, disaster recovery, and multi-Region architectures
This simplifies constructing global data lakes and ensures consistent, up-to-date Iceberg tables regardless of geography.
Pricing Details
Intelligent-Tiering
No additional overhead to enable
Pay only for storage per tier
Monitoring via AWS CUR, CloudWatch, and S3 metrics
Replication
Charges include:
Storage in destination tables
Replication PUT requests
Table commits
Object monitoring for replicated files
Inter-Region data transfer fees (when applicable)
Customers can refer to the Amazon S3 pricing page for full details.
Availability
Both new features—Intelligent-Tiering storage class and S3 Tables replication—are available today in all AWS Regions supporting Amazon S3 Tables.
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