Uri Plug-In - Red Hat DIRECTORY SERVER 8.0 - ADMINISTRATION Administration Manual

Chapter 16. Administering Directory Server Plug-ins
Plug-in Information
Description
Configurable Options
Default Setting
Configurable Arguments
Dependencies
Performance Related Information
Further Information
Table 16.32. Details of UID Uniqueness Plug-in

16.1.33. URI Plug-in

Plug-in Information
Plug-in Name
424
Description
Checks that the values of specified attributes are
unique each time a modification occurs on an
entry. For example, most sites require that a user
ID and email address be unique.
on | off
off
To check for UID attribute uniqueness
in all listed subtrees, enter uid "DN"
"DN".... However, to check for UID attribute
uniqueness when adding or updating entries
with the requiredObjectClass, enter
attribute="uid" MarkerObjectclass
= "ObjectClassName" and,
optionally requiredObjectClass =
"ObjectClassName". This starts checking for
the required object classes from the parent entry
containing the ObjectClass as defined by the
MarkerObjectClass attribute.
N/A
This plug-in may slow down Directory Server
performance. In a multi-master replication
environment, the UID Uniqueness Plug-in will not
work at all and should therefore not be enabled.
Additionally, this plug-in does not work with
referrals the UID Uniqueness Plug-in fails with an
operations error if it receives any other error than
noSuchObject (meaning that the entry does
not already exist), which prevents the new entry
from being added. The referral on the subtree
returns a different error message, so trying to
add a new entry to a subtree with a referral while
the UID Uniqueness Plug-in is enabled will fail.
To prevent being blocked by such an operations
error, disable the plug-in on the server where
the referral is created. To run a UID uniqueness
check, make sure that the plug-in is only active
on the last of the referred-to servers to prevent it
from blocking the referral mechanism.
Chapter 18, Using the Attribute Uniqueness
See
Plug-in.
Description
URI Syntax