[Samba] Samba query on possible backend database

[satya panda]

Hi Group,
       This is the first time , im mailing to the group. I go through
research on the possible databases as backend for samba. Here the
below matrix...

                                                possible backend
Samba                 mysql      oracle        open LDAP     MS SQL  
TDB   NIS   AD   RADIUS
3.0.22      result:   (  Not
                       supported)      ?              testing on      
  ?             ?       ?        ?        ?
                                                             progress..


Can anybody help me out, on which databse or server (on above matrix)
,act as a backend for samba..
    Its urgent...

Satya prasad,