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I am trying to build a MDD from a relational Oracle Database using Oracle Express Server. Should I have the RDBMS and MDD on the same machine or on a separate machine? What are the pros and cons?

    Ask The Experts published in DMReview.com
October 30, 2000
 
  By Chuck Kelley and David Marco

Q:  

I am trying to build a MDD from a relational Oracle Database using Oracle Express Server. Should I have the RDBMS and MDD on the same machine or on a separate machine? What are the pros and cons?

A:  

Chuck Kelley's Answer: I have used them on the same machine and on separate machines, so it really depends on whether you have the required disk environment, memory and CPU available on the single machine. If so, then you should be OK, if not, a second machine would be preferred, since you can tune to the needs of each DBMS.

David Marco's Answer: By MDD I assume you mean meta data dictionary, which is the same as a meta data repository. Also I assume that when you say RDBMS you are referring to the RDBMS in which your data warehouse or operational system resides and that you repository will support this system. In general I like to keep my repositories on the machine that 1. has the most available bandwidth (disk space and processing power), and 2. that is most easily accessible to our other systems. Typically this is the same machine as the data warehouse.

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For more information on related topics visit the following related portals...
DW Servers.

Chuck Kelley is a senior architect in the business intelligence practice for Hitachi Consulting (www.HitachiConsulting.com), a globally recognized leader in delivering value-based business and IT Solutions. Kelley is an internationally known expert in database and data warehousing technology. He has 30 years of experience in designing and implementing operational/production systems and data warehouses. Kelley has worked in some facet of the design and implementation phase of more than 50 data warehouses and data marts. He also teaches seminars, co-authored three books on data warehousing and has been published in many trade magazines on database technology, data warehousing and enterprise data strategies. He can be contacted at chuckkelley@hitachiconsulting.com.

David Marco is an internationally recognized expert in the fields of enterprise architecture, data warehousing and business intelligence and is the world's foremost authority on meta data. He is the author of Universal Meta Data Models (Wiley, 2004) and Building and Managing the Meta Data Repository: A Full Life-Cycle Guide (Wiley, 2000). Marco has taught at the University of Chicago and DePaul University, and in 2004 he was selected to the prestigious Crain's Chicago Business "Top 40 Under 40."  He is the founder and president of Enterprise Warehousing Solutions, Inc., a GSA schedule and Chicago-headquartered strategic partner and systems integrator dedicated to providing companies and large government agencies with best-in-class business intelligence solutions using data warehousing and meta data repository technologies. He may be reached at (866) EWS-1100 or via e-mail at DMarco@EWSolutions.com.

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