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Unformatted text preview: els on the network from the database client to
the database server, and the database server retrieves the requested information
from the database and sends only that information back to the client. Obviously,
there can be many database clients simultaneously connected to the same database
server and all of them can share the same database.
The client-server database system enjoys the following advantages over
conventional database systems:
Efficient utilization of computing resources. Separate databases are not
required for every user. Hence only the database server needs to have high
processing power and large storage. The database clients can be low-end personal
computers having low processing power and low storage capacity.
Since only one copy of the database is maintained for all the clients, it is
easier to maintain the integrity (consistency) of the data. That is, all database
updates need to be carried out only at one place.
3. Since only one copy of the database is maintained for all the clients, it is also
easier to ensure greater security of the data.
4. The system administration and maintenance cost is also lower because a good
system and database administrator is required only where the database server is.
With the popularity of the Internet, the 4concept of database clients has now been
extended to web clients. A web client is a computer system connected to the
Internet that runs a web browser. The web browser enables a web client to
dynamically connect to a database server, download necessary client software for
becoming a database client, and make requests for information to the database
The web-based database clients have proved to be better than the conventional
database clients because the deployment of the client software to hundreds of
database client machines was causing unacceptable effort. That is, seamless
upgrades of client software to new versions was either not possible or was causing
high maintenance cost. Distributed Database S...
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This document was uploaded on 04/07/2014.
- Spring '14