The PingDirectory Server compacts entry DNs by tokenizing common parent DNs. Tokenizing the common parent DNs allows you to increase space usage efficiency when encoding entries for storage. The Directory Server automatically defines tokens for base DNs for the backend (for example, dc=example,dc=com). You can also define additional common base DNs that you want to tokenize. For example, use the following configuration to tokenize two branches, ou=people,dc=example,dc=com and ou=customers,dc=example,dc=com:

$ bin/dsconfig set-backend-prop --backend-name userRoot \ 
  --add "compact-common-parent-dn:ou=people,dc=example,dc=com" \ 
  --add "compact-common-parent-dn:ou=customers,dc=example,dc=com"