Script to get the total data size on Mongo DB

rs.slaveOk();

print("totaling database size")

var totalSize = 0

db.getMongo().getDBNames().forEach(function (d) {

print("Database: " + d );

var curr_db = db.getSiblingDB(d);

//printjson( curr_db.stats() );

curr_db.getCollectionNames().forEach(function(coll) {

print(".. collection: " + coll );

var c = curr_db.getCollection(coll);

if ( typeof c != "function") {

var collSize = c.totalSize()

print(".. size: " + collSize)

totalSize += collSize

}

});

});

print("totalsize: " + totalSize)