Modification conflict scenarios - PingDirectory - 9.0

Modification conflicts resolve automatically and no manual action is required. The LDAPModify operation allows the following modification types:

• Add of one or more values
• Delete of one or more values or the entire attribute
• Replacement of all values

The following illustration presents a modification conflict scenario.

Processing steps

1. LDAP client A sends a modify request to Directory Server A.
2. LDAP client B sends a conflicting modify request to Directory Server B.
3. Directory Server A applies the modification.
4. Directory Server B applies the modification.
5. The LDAP clients receive successful responses.
6. Replication propagates the updates.
7. Conflict resolution on Directory Server A updates the entry to reflect the value on Directory Server B.

   Conflict resolution on Directory Server B ignores the update received from Directory Server A.

The following table shows the result of a modification conflict depending on the type of updates that occur. For all of the operations in the table, assume the following:

• LDAP Modify 1 was applied at Directory Server 1.
• LDAP Modify 2 was applied at Directory Server 2.
• LDAP Modify 1 occurred shortly before LDAP Modify 2, so that Directory Server 2 received LDAP Modify 1 after LDAP Modify 2 was applied.