A method, in one embodiment, can include allowing storage allocation of data of a file system within an object based storage system. Furthermore, the method can include determining if storage allocation usage for the file system is below a threshold. If the storage allocation usage for the file system is not below the threshold, a client is requested to flush its dirty data associated with the file system. After requesting a client flush, the method can include determining the storage allocation usage for the file system. In addition, the method can include determining periodically if the storage allocation usage has reached a quota. If the quota is reached, the quota is enforced for the data of the file system.