Comment by jopari

It seems to be intended as the backend database for the Dero blockchain smart contract platform: https://medium.com/deroproject/graviton-zfs-for-key-value-st...

The post claims: "The features included in Graviton provide the missing functionality that prevented Stargate RC1 from reaching deployment on our mainnet."

I'm not sure, but I guess that this checksumming is relevant for storing the Merkle trees encoding the blockchain. I don't know why the previous choice of database wasn't suitable.