id2_id.js

use socialiq;
var documents_count = 0;
db.crawler_users.find({_id: {$type: 7}}).forEach(function(doc){ 
	documentsCount++;
	var sleepTime = (documentsCount % 10) ? 1000 : 0;
	setTimeout(function(){
		var id=doc._id; 
		doc._id=doc.id; 
		db.crawler_users.remove({_id:id});
		db.crawler_users.insert(doc);
	}, sleepTime);
	console.log(documentsCount);
});