In nova, if you update the value of quota from large to small, it will failed, but if use DbQuotaDriver, it will allow update the value of quota from large to small, so I think it should do as in nova!
In nova, if you update the value of quota from large to small, it will failed, but if use DbQuotaDriver, it will allow update the value of quota from large to small, so I think it should do as in nova!