Bulk data write in Couchbase

I have a bulk data in flat file and want to load into couchbase with some business logic to filter the data.
so please let me know, the best approach for loading the data in Java or Node.js.
20% faster reading the data by node.js as compare to Java.

Hi, could you show us part of your flat file to get an idea of what you need to import? Rx is a well suited paradigm to do so, I invite you to read the following blog post to get an idea: http://blog.couchbase.com/2015/august/moving-couch