Administration Guide › How CA Directory Works › DSAs › Advanced Indexing Commands › Reverse-Index Attributes

Reverse-Index Attributes

For some attributes, such as phone numbers, the only significant differences in the values occur towards the end of the value. For example, all users might have the same leading digits in their telephone numbers. In such cases, it makes searching faster if you reverse index the attribute, so that the index is created on the values after reversing the order of the bytes.

CA Directory does not use a reverse index in preference to a regular forward index. It is only used in substring lookups where you use specify final as an allowed filter.

To reverse-index an attribute, add the following command to the initialization file (.dxi):

set cache-reverse = attribute-list | all-attributes;

For example, 123-4567 is indexed as if it were 7654-321.