Compare the terms MongoDB and CouchDB?

MongoDB and CouchDB are traditionally open sources No SQL, document-oriented database.   Apart from storing the data outside, they have nothing in common. Even their interface storage and replication methods are different in each and every approach.

CouchDB is simple and easy to maintain no additional cost or efforts are given by the user to maintain this Database. It is flexible and has more scalability, which makes it a better product among others.

Based on the requirements and assumptions in the project a particular kind of database is chosen. CouchDB offers few out of the box features and this leads to the high demand of this database irrespective of challenges. Discussing the replication, multi-master replication seems attractive to the clients in the context of using this database in their project.

Still, the challenge remains in replication is conflict resolution. Maintenance of this database is quite simple and affordable. It doesn’t require too much caring and attention. This is considered as one of the most stable and user-friendly DB and crashes only in critical situations. But it is not always possible to save and protect the whole data after a crash, sometimes data can be lost forever if the proper process not followed. One of the other advantages is as it only uses JSON and HTTP, it reduces the use of middle server and cut downs the cost and is used directly from browser JavaScript.

Best example, which can be given here, is when the user does not wish to change the document data too frequently and without this can define all possible queries in advance.  Apart from these services the CouchBase server can fulfill several other requirements like SQL integration, scale-out architecture, core database engine etc.