creating consistant image of ldap ds 5.2 thru backup and restore

Backing up Sun one Directory Server 5.2:

 

Backing up Directory Server online:

 

Precautions:

• Make sure the server is in read-only state. if you want to have consistent snapshot.

                   mostly i stop the instance and took backup.

Don’t make configuration changes while the server is being backed up, because the configuration contains information about the server whether it is in “read-write only” or “read-only”

Procedure:

 

1.     Bring Directory server 5.2 into read-only state by modifying the “nsslapd-readonly”  attribute to “on” state using the LDIF, make sure this directory is not replicated at the time of backing up because this will cause into replication errors, because at the time of backup server is automatically in read only mod and other server cant send update requests to this server.

 

2.     Backing up LDIF or binary backup

 

         LDIF backup:

          ServerRoot/slapd-instance/db2ldif –a/safe/place/Example.ldif –s   

          dc=example,dc=com

       

         Binary backup:

         ServerRoot/slapd-instance/db2bak. /safe/place

 

3.     Copy the “dse.ldif” configuration file to a safe place.

 

4.     Copy specific schema to a safe place, make sure that the modified schemas which are located in 99user.ldif is copied to safe location has well has schemas which have been updated.

 

5.     Bring back the Directory Server into read-write-mode by  modifying the “nsslapd-readonly” attribute to “off” state

 

Restoring after a system failure:

 

Restoring Directory Server from backup

 

1.     Install both the OS and also Directory Server with the same configuration as the original system.

 

2.     Stop Directory Server and all application processes.

 

3.     Overwrite the Directory Server configuration with the backup version

 

4.     Restore the schema modifications from the safe place into the schema directory

 

5.     Restore all non-replicated backend databases from LDIF or binary backup. For restoring the replicated-data we need to consider initializing the replica from the supplier

 

6.     Restart Directory Server and bring back into read-write state my modifying “nsslapd-readonly” attribute to “off” state.

 

7.     Reinitialize replication agreements

 

8.     Restart application processes on the system.