[Samba] Samba 3.0.12pre1 Available for Download

Volker Lendecke Volker.Lendecke at SerNet.DE
Fri Mar 4 16:59:30 GMT 2005

On Mon, Feb 28, 2005 at 08:11:44AM -0600, Gerald (Jerry) Carter wrote:
> Volker still owes some docs on it as far as I know.

By default, Samba as a Domain Controller with an LDAP backend needs to use the
Unix-style NSS subsystem to access user and group information. Due to the way
Unix stores user information in /etc/passwd and /etc/group this inevitably
leads to inefficiencies. One important question a user needs to know is the
list of groups he is member of. The plain Unix model involves a complete
enumeration of the file /etc/group and its NSS counterparts in LDAP. In this
particular case there often optimized functions are available in Unix, but for
other queries there is no optimized function available. 

To make Samba scale well in large environments, the ldapsam:trusted=yes option
assumes that the complete user and group database that is relevant to Samba is
stored in LDAP with the standard posixAccount/posixGroup model, and that the
Samba auxiliary object classes are stored together with the the posix data in
the same LDAP object. If these assumptions are met, ldapsam:trusted=yes can be
activated and Samba can completely bypass the NSS system to query user
information. Optimized LDAP queries can speed up domain logon and
administration tasks a lot. Depending on the size of the LDAP database a factor
of 100 or more for common queries is easily achieved.

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