
Amazon S3 now supports conditional writes, allowing users to evaluate an object's ETag before updating it, which helps prevent unintended overwrites in distributed applications with concurrent writes.


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<p>
Amazon S3 has introduced a new feature for conditional writes, which helps manage concurrent updates to the same object across distributed systems.
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<ul>
<li>Allows evaluation of an object's state before updating using ETag</li>
<li>Prevents unintentional overwrites by multiple concurrent writers</li>
<li>Works with S3 PutObject and CompleteMultipartUpload API requests</li>
<li>Supports both general purpose and directory buckets</li>
<li>Enables compare and swap operations for large-scale analytics and distributed workloads</li>
</ul>
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This functionality is available in all AWS Regions at no additional cost and can be implemented using AWS SDK, API, or CLI.
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Amazon S3 adds new functionality for conditional writes

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