-- [EMAIL PROTECTED] on 04/02/02 12:03:27 -0800
> Hi All -
> This is for DBAs who have participated in a DW project: what kind of tools
> did you use for design, ETL, Query etc. I know Oracle has a data warehouse
> builder but it doesn't seem to be widely used. What is the most popular
> tools out there for DW construction and what is the trend?
Most of the ETL I design is done with Ab Initio, less often
Informatica. Ab Initio is the best tool going for scaleable
parallel processing and distribution across multiple nodes;
Informatica has some advantages with lower throughput and
messier metadata; its licensing is also simpler.
I tend to use Red Brick for data warehousing. Main reasons
are offline loading of data, star and target indexes and
much simpler data management -- mainly due to lack of rollback
processing and ability to add phyisical storage without
effecting data access.
Now that Oracle at least has partitioning it gets more usable
for warehousing but still needs too much care and feeding,
and doesn't support offline loads. For clickstream processing
Oracle with partitioning is a nice combination.
In either case, DBI seems to be the most portable way to talk
to various databases, especially for combining data from multiple
sources (e.g., feeding selection criteria back from a Red Brick
warehouse to an Oracle OLTP system).
enjoi.
--
Steven Lembark 2930 W. Palmer
Workhorse Computing Chicago, IL 60647
+1 800 762 1582
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