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Submitted to: Submitted By: 
Sarbjeet Singh 
Roll No: 5(DBU) 
MCA 2nd Year
 Local Application 
 Global application 
 Local application: 
Applications which do not require data 
from other sites 
 Global Application: 
Applications which do require data from 
other sites. 
.
 Homogeneous distributed database 
 Heterogeneous distributed database 
 Client/Server Architecture
 In a homogeneous distributed database, all 
sites have identical software and hardware. 
 A homogeneous DDBMS appears to the user as 
a single system. 
 The homogeneous system is much easier to 
design and manage.
 The following conditions must be satisfied for 
homogeneous database: 
(a) The operating system used, at each location must be 
same. 
(b) The data structures used at each location must be same. 
(c) The database application (or DBMS) used at each 
location must be same.
 In a heterogeneous distributed database, 
different sites may use different software. 
 Different nodes may have different hardware 
& software and data structures at various 
nodes or locations. 
 Different computers and operating systems, 
database applications or data models may be 
used at each of the locations.
 The client–server model was developed at 
Xerox PARC during the 1970s. It is now 
prevalent in computer networks, Email, the 
World Wide Web are typical examples of the 
model. 
 The database application and database are 
separated in two Parts: 
 Front-end/client portion 
 Back-end/server portion
Distributed data base management system

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Distributed data base management system

  • 1. Submitted to: Submitted By: Sarbjeet Singh Roll No: 5(DBU) MCA 2nd Year
  • 2.  Local Application  Global application  Local application: Applications which do not require data from other sites  Global Application: Applications which do require data from other sites. .
  • 3.  Homogeneous distributed database  Heterogeneous distributed database  Client/Server Architecture
  • 4.  In a homogeneous distributed database, all sites have identical software and hardware.  A homogeneous DDBMS appears to the user as a single system.  The homogeneous system is much easier to design and manage.
  • 5.  The following conditions must be satisfied for homogeneous database: (a) The operating system used, at each location must be same. (b) The data structures used at each location must be same. (c) The database application (or DBMS) used at each location must be same.
  • 6.  In a heterogeneous distributed database, different sites may use different software.  Different nodes may have different hardware & software and data structures at various nodes or locations.  Different computers and operating systems, database applications or data models may be used at each of the locations.
  • 7.
  • 8.  The client–server model was developed at Xerox PARC during the 1970s. It is now prevalent in computer networks, Email, the World Wide Web are typical examples of the model.  The database application and database are separated in two Parts:  Front-end/client portion  Back-end/server portion