Couchbase is a distributed NoSQL document database that offers a flexible, high-performance, and scalable data management solution, integrating features of document databases with key-value stores to suit modern application development. It supports JSON document storage, a memory-first architecture for enhanced performance, and multi-dimensional scaling to allow separate scaling of query, index, and data services. Couchbase’s SQL-like query language, SQL++, facilitates easy data manipulation and retrieval, while advanced indexing and integrated caching improve data access speed. When integrated with Hyperledger Fabric, Couchbase offers enhanced scalability, performance, and enterprise features such as cross-datacenter replication and real-time processing capabilities, making it a viable alternative to CouchDB. The setup process involves configuring Couchbase with Hyperledger Fabric to utilize SQL++ instead of Mango queries, enabling more sophisticated query capabilities without sacrificing performance. The integration supports multiple programming languages through robust SDKs, and Couchbase's analytics capabilities allow for real-time insights into blockchain transactions, addressing the limitations of CouchDB while providing superior enterprise support and management tools.