title: What programming languages and databases are suported by Hyperledger Fabric?
body: <p>I have previous experience in using Ethereum and Solidity, but now I want to try writing smart contracts for Hyperledger. </p>
  
  <p>I have few considerations: </p>
  
  <p>First one is regarding supported databases. According to their documentation (<a href="http://hyperledger-fabric.readthedocs.io/en/latest/ledger.html" rel="nofollow noreferrer">http://hyperledger-fabric.readthedocs.io/en/latest/ledger.html</a>) they use LevelDB for storing contract data and CouchDB support is still in beta. Does anyone have any experience using CouchDB in Hyperledger? </p>
  
  <p>Second, I see that Go is mostly used for the specification of smart contracts, but they have support for Java too. Is Java still in beta too, and is there support for any other programming language? </p>
  
  <p>Also, what operating system do you suggest for production server running Hyperledger?</p>
  
  <p>Thank you for the answers. </p>