JuiceFS relies on the object store to provide integrity for data. Besides that, JuiceFS stores the checksum of each object as tags in S3, and verifies that when downloading the objects.
Inside the metadata service, it uses merkle tree (hash of hash) to verify the integrity of whole namespace (including id of data blocks) between RAFT replicas. Once we store the hash (4 bytes) of each objects into metadata, it should provide the integrity of the whole namespace.
Inside the metadata service, it uses merkle tree (hash of hash) to verify the integrity of whole namespace (including id of data blocks) between RAFT replicas. Once we store the hash (4 bytes) of each objects into metadata, it should provide the integrity of the whole namespace.