Samba 3.0.25rc3 Available for Download

Gerald (Jerry) Carter jerry at
Wed Apr 25 12:09:01 GMT 2007

Hash: SHA1

                    I'm not really concerned with performance.
                              -- SambaXP 07 Attendee referring
                                           to LDAP Directories
Release Announcements
This is the third release candidate of the Samba 3.0.25 code base
and is provided for testing only.  An RC release means that we are
close to the final release but the code may still have a few
remaining minor bugs.  This release is *not* intended for production
servers.  There has been a substantial amount of development since
the 3.0.23/3.0.24 series of stable releases.  We would like to ask the
Samba community for help in testing these changes as we work towards
the next significant production upgrade Samba 3.0 release.

Major features included in the 3.0.25 code base include:

  o Significant improvements in the winbind off-line logon support.
  o Support for secure DDNS updates as part of the 'net ads join'
  o Rewritten IdMap interface which allows for TTL based caching and
    per domain backends.
  o New plug-in interface for the "winbind nss info" parameter.
  o New file change notify subsystem which is able to make use of
    inotify on Linux.
  o Support for passing Windows security descriptors to a VFS
    plug-in allowing for multiple Unix ACL implements to running side
    by side on the Same server.
  o Improved compatibility with Windows Vista clients including
    improved read performance with Linux servers.
  o Man pages for IdMap and VFS plug-ins.

Off-line Logons and AD Site Support

Winbind's capability to support offline logons has been greatly
improved with the 3.0.25 release including support for locating
domain controllers asynchronously using Active Directory Site

New IdMap Interface for Winbindd

The 3.0.25 release of Samba includes a rewritten IdMap interface
for winbindd which replaces the "idmap backend" parameter.  Please
refer to the "idmap domains" description in the smb.conf(5) man
page for more details.

Dynamic DNS Updates

The "net ads join" command is now able to register the host's DNS A
records with Windows 2000 SP4 and 2003 DNS servers.  This
feature must be enabled at compile time using the --with-dnsupdate
when running the ./configure script.  There is also a related "net ads
dns" command for refreshing a host's records which could be launched
from a dhcp client script when a new IP address is obtained.

Support for Additional ACL Modules

Samba's POSIX ACL support has been moved inside of the VFS layer
which means it is now possible to support multiple ACL implementations
on the same server including NFSv4 and GPFS ACLs.

VFS ReadAhead Plugin

Windows Vista introduces pipe-lined read support for improved
performance when transferring files.  The new vfs_readahead plugin
allows Linux file servers to utilize additional Kernel buffers
for caching files in order to avoid Disk I/O wait time when serving
Vista clients.  If you experience poor read performance between
Linux servers and Vista clients, please test the vfs_readahead
module by adding the following lines to the share definition
in smb.conf:

	vfs objects = readahead

Note that this plugin will result in additional RAM requirements
due to the increased amount of kernel buffer caches used by smbd.
Please refer to vfs_readahead(8) for more information.

Windows Vista, Office 2007, and Offline Files

Research surrounding offline files, Windows Vista, and Microsoft
Office 2007 has revealed a incompatibility between these
applications and the "map acl inherit = no" setting in smb.conf.
Users requiring support client side caching (csc) and offline
files are encouraged to enable the "map acl inherit" for any
affected share definitions in the server's configuration.
Future versions of Samba will enable this setting by default.

Please refer to the smb.conf(5) man page for more details on
"map acl inherit".

Download Details

The uncompressed tarballs and patch files have been signed
using GnuPG (ID 6568B7EA).  The source code can be downloaded

The release notes are available online at:

Binary packages will be made available on a volunteer basis from

Our Code, Our Bugs, Our Responsibility.

			The Samba Team
Version: GnuPG v1.4.3 (GNU/Linux)
Comment: Using GnuPG with Mozilla -


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