March 2010
Intermediate to advanced
408 pages
9h 59m
English
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Backing maps
Now that we have covered various cache topologies, it is time to complete the puzzle by learning more about backing maps.
As you learned earlier, the backing map is where cache data within the cluster is actually stored, so it is a very important piece within the Coherence architecture. So far we have assumed that a backing map stores all the data in memory, which will be the case for many applications as it provides by far the best performance. However, there are situations where storing all the data in memory is either impossible, because the data set is simply too big, or impractical, because a large part of the data is rarely accessed and there is no need to have the fastest possible access to it at all times.
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