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OUD Replication - Using the External ChangeLog (Doc ID 1406188.1)

Last updated on JUNE 13, 2020

Applies to:

Oracle Unified Directory - Version and later
Identity Manager - Version to [Release 11g]
Information in this document applies to any platform.
***Checked for relevance on 29-10-2013***


The External Change Log (ECL) provides an alternate view of the replication change log.

The ECL is based on the LDAP changelog draft ( but does not strictly support this change log.
The LDAP change log draft uses an integer as the key to browse the change log whereas the ECL uses a cookie.

The following document explains how to use the External Change Log (ECL).




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In this Document
 1)  ECL Usage Candidates
 2) External Changelog - Display Changes
 2.1) Indicate the attribute being recorded in the changelog
 2.2) Deciphering the 64 bit value
 2.3) Using ODSM
 3) Purging the ECL
 4) Using the External ChangeLog with a Client Application
 1. Retrieving the lastExternalChangeLog cookie (for the first time) for the client application
 2. Client application using lastExternal changelog cookie
 5) Result Code: 53 (Unwilling to Perform) error
 6) Advantages of the ECL cookie implementation for the client

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