var log = require('log4node');

log.reconfigure({level: 'warning', file: 'test.log', prefix: "%l %p : "});

var sublogger1 = log.clone({prefix: "SUB1 - "});
var sublogger2 = log.clone({prefix: "SUB2 - ", level: 'error'});

sublogger1.warning("titi1");

setTimeout(function() {
  sublogger2.critical("titi2");
  sublogger2.warning("titi3");
}, 500);

sublogger1.warning("titi4");