It means when a cache machine is added, it takes its share of objects from all the other cache machines and when it is removed, its objects are shared among the remaining machines.
To znači da, kada se doda keš mašina, ona preuzima svoj deo objekata od svih drugih keš mašina, a kada se ona ukloni, njeni objekti se raspodele među preostalim keš mašinama.