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Excerpt

S3 Versioning

Swarm's native object versioning feature is interoperable with AWS S3 versioning. The implementation includes these improvements:

  • Ability to disable versioning: 
    AWS S3 allows for versioning to be suspended once enabled on a bucket. Swarm provides the ability to disable versioning and automatically clean up the prior versions in order to reclaim storage space.

  • Delete marker consolidation: 
    Unlike AWS S3 where continued DELETE operations on a deleted object record additional delete markers in the version history, Swarm acknowledges the subsequent deletes without recording additional delete markers. Multi-factor authentication delete is not supported.

  • Expanded version listing: 
    Swarm supports version listing batches up to 2000 items while AWS S3 limits these listing results to batches of 1000. Additionally, Swarm does not break batches on version boundaries. Delimiter case is currently not supported for version listing.

  • Simplified ACL management:
    When using per-object ACLs with versioning, the ACL for the current version of the object applies for determining authorization. To change the ACL for an object's entire version chain, update the object without specifying a version.

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