An unrealistic assumption of this work is that the access fre quencies are static and known to every node. We assume that each object has a permanent, disk resident copy at a specific node called the object s home. Client Data Caching , Kluwer Academic Press, Boston, 1996. The default simulation parameter settings used in this study are shown in Table 2. The allocation of memory in our experiments is described in Section 4. 1.
Several details deserve additional explanation.
As stated in the introduction, both data shipping and queryshipping are commonly used in distributed database systems. Client Data Caching . Kluwer Academic Press, Boston, 1996.