The index values must have been normalized before being used
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Key: DIRSERVER-1578
URL: https://issues.apache.org/jira/browse/DIRSERVER-1578
Project: Directory ApacheDS
Issue Type: Improvement
Affects Versions: 1.5.7
Reporter: Emmanuel Lecharny
Each time we access an index using a value, we do a normalization of this
value. This is potentially an costly operation, which is mostly a duplicated
work. In order to spare such an operation, a cache is added to the index, but
it has two drawbacks :
- first the cache is small (default size is 100, just enough to store 50 values
at most, as we register both the normal value and the normalized value)
- second, this cache is synchronized to avoid inconsistencies, so it induce
some contention
We should assume that the value is *always* normalized when we use such an
index, and remove this extra normalization, and the associated cache.
Note that we may use a Attribute value, or a Long (for the reverse index), so
it would be quite a good idea to create two different type of indexes :
- AttributeType index
- ID indexes
instead of using generic indexes all the time.
Last, in order to be sure that we use normalized values, it's enough to add a
flag in the Value<?> class to tell if the value is normalized or not. If it's
not, we just have to normalize it.
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