The Most Important
Value Adds in a Directory . What are the main value adds in a directory? Alternatively
put, what are the main features beyond the basics that you should look for in
an LDAP- or X.500-accessible data store containing information about people, their
resources, and access privileges?
If you need a big system, performance and scaling are crucial. This needs to be
measured carefully. In particular, reads should be fine-tuned, with fast searching;
for example, test component matching, word matching, misspelling search, acronym
and synonym search, intelligent substring searching, inclusive/exclusive searching,
and phonetic matching.
Directories often support critical systems. Things you need to look for are online
backup/disaster recovery and fail-over clustering.
This is often critical for performance and resilience. X.500 is important if you
want open standards or multivendor systems.
David Ferris, with thanks to Isode's
Steve Kille and Persistent Systems' Sameer Karmarkar