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Lately I have found I have to do a lot of long running operations like:

db.whois.find({"basic.last_updated":"1970-01-01 00:00:00"}).forEach(function (doc) {
  var parts = doc._id.split('@');
  doc.basic.last_updated = parts[1];
  db.whois.save(doc);
})

That's fine but since the shell prompt doesn't return until it's complete I am finding I have to keep lots of shells open. Is there any way I can issue a command and send it async so that I can continue using the same shell? Maybe even get a little message when the process is done?

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