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ADVANCED-DBMS-10CS751-->View question


Asked On2017-12-18 08:30:04 by:Purnima

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leobatsam22Aparna-Dasgupta

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Advantages of DDBMS
The database is easier to expand as it is already spread across multiple systems and it is not too complicated to add a system.
The distributed database can have the data arranged according to different levels of transparency i.e data with different transparency levels can be stored at different locations.
The database can be stored according to the departmental information in an organisation. In that case, it is easier for a organisational hierarchical access.
there were a natural catastrophe such as fire or an earthquake all the data would not be destroyed it is stored at different locations.
It is cheaper to create a network of systems containing a part of the database. This database can also be easily increased or decreased.
Even if some of the data nodes go offline, the rest of the database can continue its normal functions.
Disadvantages of DDBMS
The distributed database is quite complex and it is difficult to make sure that a user gets a uniform view of the database because it is spread across multiple locations.
This database is more expensive as it is complex and hence, difficult to maintain.
It is difficult to provide security in a distributed database as the database needs to be secured at all the locations it is stored. Moreover, the infrastructure connecting all the nodes in a distributed database also needs to be secured.
It is difficult to maintain data integrity in the distributed database because of its nature. There can also be data redundancy in the database as it is stored at multiple locations.
The distributed database is complicated and it is difficult to find people with the necessary experience who can manage and maintain it.

Answerd on:2019-06-26 Answerd By:avi738

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Advantages of distributed database are:-
1) In a distributed database, data can be stored in different systems like personal computers, servers, mainframes, etc.
2) A user doesn’t know where the data is located physically. Database presents the data to the user as if it were located locally.
3) Database can be accessed over different networks.
4) Data can be joined and updated from different tables which are located on different machines.
5) Even if a system fails the integrity of the distributed database is maintained.
6) A distributed database is secure.

Disadvantages of distributed database are-:
1) Since the data is accessed from a remote system, performance is reduced.
2) Static SQL cannot be used.
3) Network traffic is increased in a distributed database.
4) Database optimization is difficult in a distributed database.
5) Different data formats are used in different systems.
7) Managing system catalog is a difficult task.
                                                                         


Answerd on:2018-06-05 Answerd By:aksingh1818

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