In-Memory Data Management by Hasso Plattner & Alexander Zeier

Author:Hasso Plattner & Alexander Zeier
Language: eng
Format: epub
Publisher: Springer Berlin Heidelberg, Berlin, Heidelberg

5.6.3.4 Value Updates

Besides aggregate and status updates, the value of a tuple (for example, the address of a customer) can be modified. Since the change of an attribute in an enterprise application has to be recorded (log of changes) in most cases, an insert-only approach seems to be the appropriate solution.

We analyzed customer data in different industries and the frequency of value updates in financial accounting applications covering a time span of about five years. The results are depicted in Fig. 5.16 and show that on average only 5% of tuples are actually changed.

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