A Distributed DBMS may have a number of local
applications, but it has at least one global application. Thus, a distributed
DBMS has the following features:
1) A distributed DBMS is a collection of logically
related shared data.
2) The data in a distributed DBMS is split into a
number of fragments or partitions.
3) Fragments may be replicated in a distributed
system.
4) Fragments/replicas are allocated to different
sites.
5) In a distributed system, the sites are linked by
communications network.
6) The data at each site is under the control of a
DBMS.
7) The DBMS at each site has its own right, that is,
it can handle local applications independently.
8) Each DBMS in a distributed system participates in at least one global application.
