[Samba] Anything like "nss_updatedb" for ldapsam account information backend?

[Jack Bates]

Is there anything like "nss_updatedb" [1] for ldapsam account 
information backend?

nss_updatedb caches unix account information, so it is available even 
when the LDAP directory isn't available

But ldapsam stores additional account information. How can I cache this 
additional account information, so it is also available even when the 
LDAP directory isn't available?

[1] http://www.padl.com/OSS/nss_updatedb.html