  The Hyperledger Fabric is well known and the most prominent enterprise-grade
permissioned blockchain. The architecture of the Hyperledger Fabric introduces
a new architecture paradigm of simulate-order-validate and pluggable
architecture, allowing a greater level of customization where one of the
critical components is the world state database, which is responsible for
capturing the snapshot of the blockchain application state. Hyperledger Fabric
manages the state with the key-value database abstraction and peer updates it
after transactions have been validated and read from the state during
simulation. Therefore, providing good performance during reading and writing
impacts the system's overall performance. Currently, Hyperledger Fabric
supports two different implementations of the state database. One is LevelDB,
the embedded DB based on LSM trees and CouchDB. In this study, we would like to
focus on searching and exploring the alternative implementation of a state
database and analyze whenever there are better and more scalable options. We
evaluated different databases to be plugged into Hyperledger Fabric, such as
RocksDB, Boltdb, and BadgerDB. The study describes how to plug new state
databases and performance results based on various workloads.
