Dynamic constraints and object migration
نویسندگان
چکیده
منابع مشابه
Dynamic Constraints and Object Migration
A “role set” is the set of classes in a class hierarchy where an object may reside simultaneously. A “migration pattern” is a sequence of role sets that an object can migrate through. We define a “migration inventory”, which is a set of migration patterns, as a dynamic integrity constraint on object migration. We consider three update languages: SL which has five operators, CSL+ which extends S...
متن کاملDynamic Migration Algorithms for Distributed Object Systems
Complex distributed object systems require dynamic migration algorithms thnt allocate and reallocate objects to respond to changes in the load or in the availabilip of the resources. I n this paper we present the Cooling and HotSpot migration algorithms that reallocate objects when the load on a processor is high or when the latency of a task is high. The algorithms have been iniplenietited as ...
متن کاملA Dynamic Object Replication and Migration Protocol for anInternet Hosting
This paper proposes a protocol suite for dynamic replication and migration of Internet objects. It consists of an algorithm for deciding on the number and location of object replicas and an algorithm for distributing requests among currently available object replicas. Our approach attempts to place replicas in the vicinity of a majority of requests while ensuring at the same time that no server...
متن کاملUsing Dynamic Classes and Role Classes to Model Object Migration
In this paper, we argue that object-oriented models must be able to represent three kinds of taxonomic structures: static classes, dynamic classes, and role classes, that behave diierently with respect to object migration. If CAR is a static subclass of V EHICLE, then a vehicle that is not a car can never migrate to the CAR subclass. On the other hand, if EMPloyee is a dynamic subclass of PERSO...
متن کاملDynamic migration of object semantics among heterogeneous environments
.........................................................................................................................................3 Kurzfassung...................................................................................................................................5 Table of
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Theoretical Computer Science
سال: 1997
ISSN: 0304-3975
DOI: 10.1016/s0304-3975(96)00142-9