CovenantSQL is a decentralized SQL database management system derived from SQLite and built on top of a blockchain. It supports most of the SQL-92 features. Each party interacting with CovenantSQL is either a client, a block producer, or a miner. When a client sends a connection request, the request is directed to one node among a group of block producers. The block producers form a public block chain. When a block producer receives a request, it allocates a number of CovenantSQL nodes, called miners. The miners self-organize into a separate block chain, called a shard chain, which runs SQL queries from the client. Each miner is an independent database engine running SQLite. CovenantSQL uses Go's driver for SQLite to interact with individual miners.
CovenantSQL uses a three-level architecture, consisting of a main block chain, many shard chains, and individual miners. The main block chain is a group of nodes called block producers, responsible for matching clients to shard chains. Each shard chain, which is a group of computing nodes called miners, is a single database. Each miner is a standalone database engine that is responsible for storage and query processing. The miners reach consensus using a variant of Byzantine Fault-Tolerated Raft, which the developers call Kayak.
The same set of standard SQLite commands.
Individual miners run (SQLite).
Individual miners run (SQLite).
Two-Phase Locking (Deadlock Prevention) Two-Phase Locking (Deadlock Detection)
Individual miners run (SQLite).
Individual miners run (SQLite).
Clients can specify the storage architecture through a parameter in the connection request to the database. Same as SQLite.
Same as (SQLite).
https://github.com/CovenantSQL/CovenantSQL
https://godoc.org/github.com/CovenantSQL/CovenantSQL,http://developers.covenantsql.io/docs/en/intro
Covenant Labs
2018
Go, Java, JavaScript, Python, SQL