Testnet
This is what we call our “testnet” currently it is where the Polkadot, Kusama + parachains are stored, this is because we do not have partial replica farming(yet) so we did not want the users running the testnet to have the burden of downloading all 300GB+ of history.
Farmnet
This is what we call our “farmnet” currently it is where the users and community members run their farmers and nodes, because it does not have all of the additional history that the devnet has it is much easier for users to sync, and much less of a storage overhead.
Moving Forward
This is only a temporary solution, very soon we will have partial replica farming implemented and will then be able to merge to two networks back into one.