This document summarizes and compares several popular logging libraries for Node.js including winston, bunyan, node-rlog, log.js, and log4js-node. It notes that winston supports multiple transports including CouchDB, MongoDB, Loggly, Riak, file streams, and email but has suboptimal log rotation. Bunyan uses JSON messages, streams, and improved log rotation and also includes a DTrace provider. Other libraries mentioned include node-rlog for Riak, log.js for simple streaming, and log4js-node. Popular destinations for logs are listed as files, databases, services, and streaming.

1. Ross Kukulinski
@rosskukulinski
#BayNode February 2014

5. github.com/flatiron/winston (Nodejitsu)
 Plugin
Architecture
 Multiple
transports (Couchdb, Mongodb,
Loggly, Riak, Streams/File, mail)
 Log
rotation sub-optimal

6. trentm/node-bunyan (Joyent)
 Streams!
 Messages
are json (cliprettyifier)
 Log rotation++
 DTrace provider

7.  jbrisbin/node-rlog
(Riak)
 visionmedia/log.js (simple streaming)
 nomiddlename/log4js-node

8.  File
 Database
(MongoDB, Riak, Couch)
 Services (Loggly, Papertrail, etc)
 Streaming (i.e through AMQP)