October 2012
Intermediate to advanced
316 pages
8h 47m
English
book
IBM Cognos Dynamic Cubes
by Dmitriy Beryoza, Shilpa Bhimavarapu, Alan Blake, David Cushing, Vlaunir Da Silva, Mario Daigle, Avery Hagleitner, Ian Henderson, Beth Jubera, Skyla Loomis, Chris McPherson, Steven Rogers, Carlos Ruiz, Christopher Yao
Content preview from IBM Cognos Dynamic Cubes
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Chapter 2. IBM Cognos Dynamic Cubes architecture 31
Figure 2-24 shows the loading of in-memory aggregates.
Figure 2-24 Loading in-memory aggregates
Queries that are issued to retrieve aggregate cache values are planned by Cognos Dynamic
Cubes in the same manner as when data is required to populate the data cache. As a
consequence, they are able to take advantage of any available in-database aggregate tables.
The size of the aggregate cache that is specified in the properties of a dynamic cube is simply
a maximum. The aggregate cache, however, is loaded on a first-come basis; if an aggregate
result will not fit into the cache, it is discarded. If ...
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