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Cloud Computing · Intermediate

S3 Object Lock

S3 feature providing write-once-read-many (WORM) protection with retention periods and legal holds.

Definition

Object Lock prevents object versions from being deleted or overwritten for a retention period. Governance mode allows users with special permissions to override, while compliance mode prevents anyone, including the root user, from deleting until the period ends. Legal holds block deletion indefinitely until removed. Versioning must be enabled.

Example

A broker-dealer stores trade records in compliance mode for seven years to meet SEC Rule 17a-4.

Exam tip

Compliance mode cannot be shortened or removed by anyone; governance mode can be bypassed with s3:BypassGovernanceRetention.

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