Database Reference
In-Depth Information
Replication
Replication is used to keep distributed databases up to date with a central-
source database. Replication uses a database that has been identified as a cen-
tral source and reproduces the data to distributed target databases. As more
and more data is being made available to the public over the Internet, replica-
tion of select data to locations outside the firewall is becoming more common.
Replicated data should be accessed by applications in a read-only mode.
If updates were allowed on replicated data, data would quickly become
corrupted and out of sync. Updates should be directed to the database
access tier in charge of updating the authoritative source rather than to a
replicated database.
Replication services are available from most relational database vendors
for their particular products.
RESOURCE MANAGEMENT
Resource management provides the operational facilities for managing
and securing an enterprise-wide, distributed data architecture. It provides
a common view of the data, including definitions, stewardship, distribu-
tion, and currency, and it allows those charged with ensuring operational
integrity and availability the tools necessary to do so. Research needs to be
done for all components in this category.
Security becomes an increasingly important aspect as access to data
and information expands and takes on new forms such as web pages and
dynamic content. The security policy needs to be examined to ensure
that (a) it provides for the new types of databases and the new data
types and (b) it can be enforced given the move to distributed data and
Internet access.
The Data Warehouse
A data warehouse is something you do, not something you buy. A success-
ful data warehouse does not have an end. Regardless of the methodology,
warehousing environments must be built incrementally through projects
that are managed under the umbrella of a data-warehousing program.
Search WWH ::
Custom Search