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What to look for in Data Management
 | Web-based data warehousing systems have the advantages
of ease of access, platform independence, and lower establishment cost but
there are also challenges in implementing these systems. These challenges and
proposed solutions include:
 | 1. Scalability - Too many "hits" on a website can
create slower transmission, lower performance, and increased server problems
on the network. This can highly lower user satisfaction but can be improved
by increasing server capability, ensuring server reliability, improving
network bandwidth, and utilizing multiple mainframes with massive parallel
processors (MPP). |
| 2. Speed - The issue of speed can be dealt with high
speed communication lines, ISDN, cable modems, t1 and t3 lines, satellite
networks and XDSL options. Also a caching technique is useful for data that
is accessed from disks. For example, if someone requests data from a disk,
the system checks disk cache first and if the data has been previously
accessed, the system won't re-access the data. |
| 3. Security - There are two categories of security
that need to be dealt with: unauthorized attempts to access private data via
internal and external communication networks and computer viruses. The
problems can be dealt with by applying user level security, not making
extremely sensitive data available through the internet, and by using
methods such as encryption, secure protocol, and public/private key
protocol; |
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Source: Information Systems Management, vol. 17, issue 2,
2000
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