If you want to take advantage of using an ODBMS in the middle tier and have
one or more existing relational databases, you will need to map data from a
relational format to an object format.
This mapping of data can become complex. If
you would code this mapping yourself, the amount of code devoted to
mapping often becomes 30 to 40 percent of your total code. Unfortunately,
that 30 to 40 percent is only mapping, not helping to solving your
business problem. It also adds to the possible defects you may need to fix.
So, if you need to map, consider using an object-relational
mapping product. They will save you time and reduce the number of defects
in your mapping. For more information on object-relational mapping
products, click
here (new window).
An object-relational mapping product is shown at the left of this
figure. It handles the mapping and has a cache much like an ODBMS. Data is
mapped to the ODBMS and from the ODBMS based on the application needs. The
ODBMS provides high-speed performance for the Internet.
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