La méthode Write Once Read Many ou encore nommé append-only est un concept de stockage où les données, une fois écrites, ne peuvent plus être modifiées ou supprimées pendant une période déterminée. Cette méthode garantit l'immutabilité des données sauvegardées.
Avantages principaux :
Quelques services qui supportent Write Once Read Many :
Quelques extraits d'usage de ces termes :
Many cloud storage providers provide the ability to limit access as append-only. This feature is especially important to mitigate the risk of data loss for backup policies in the event that the computer being backed-up becomes infected with ransomware capable of deleting or encrypting the computer's backups.
To prevent a compromised backup client from deleting its backups (for example due to a ransomware infection), a repository service/backend can serve the repository in a so-called append-only mode.
The object lock feature allows users to lock objects and prevent them from being deleted or overwritten. Objects can be put on lock for a specific amount of time or indefinitely. The lock period is defined by the user.
The feature uses a write-once-read-many (WORM) data protection model. This model is generally used in cases where data must not be altered once it has been written. It provides regulatory compliance and protection against ransomware, and malicious or accidental deletion of objects.