Write-once, read-many protection for blobs, provided through legal holds or time-based retention.
Also called Immutability policy.
Read more: Microsoft Learn
In the Ultra Transcenders books
Each book explains Immutable Blob storage in context, with comparison tables and the common traps.
Related terms
- Legal hold
Blob immutability policy under which data stays write-once, read-many until the hold is deliberately lifted. Legal holds and time-based retention policies can coexist on the same container.
- Time-based retention (WORM) policy
An immutability policy for blobs: for the configured retention period, data stays readable but cannot be changed or deleted.