1 'Samba4 TP4' presents you with an opportunity to see a Technology
2 Preview (TP) snapshot of Samba4's development, as at January 2007.
4 In the last few months since TP3 was released in October 2006,
5 significant work has been done across many parts of Samba4. Since that
6 time, we have added the basis for some new and exciting features:
8 PKINIT support to Samba4's KDC will allow, smart-card login to a
9 Samba4 domain. TP4 demonstrates this with static key files, but
10 work will continue to enable actual hardware cards.
12 Clustering support was always a design goal of Samba4, and with TP4
13 we have the ctdb framework, a cluster-aware shared database. This
14 allows Samba4 to share a shared cluster file-system with it's clients.
15 Presented at this year's linux.conf.au, including a highly rigged
16 demo, you can expect to see this mature over the next few months.
18 Non-blocking and Asynchronous IO support, has always been a design
19 goal in Samba4, and TP4 will use new Linux Kernel features to
20 implement event driven asynchronous IO. This makes Samba more
21 efficient on systems where some data may be 'further away' than a
22 local disk, such as HSM systems. This allows the Kernel to handle
23 reading the returned data from the disk, only notifying Samba when
24 the data is ready for dispatch to the client.
26 Our web-management console, known as SWAT, is being revamped, and in
27 TP4 you can find a new Web 2.0 style user interface, being used to
28 support a web-based ldb browser. We hope this new system will allow
29 things simple not possible with the form-submit style of web
32 Using LDB LDAP back-end integration has improved in this release, with an
33 improved mapping module allowing the start of Fedora DS back-end
36 In continuing our research effort, TP4 includes the work to better
37 understand and implement the DRSUAPI replication protocols. By better
38 understanding the needs of replication now, we can structure our
39 databases so that their format will have to change less in future.
41 We hope to use this replication function to replace the SamSync based
42 Vampire process so effectively demonstrated since TP1, and to
43 eventually join an Active Directory domain, as a replicating partner.
45 Behind the scenes, much of the core infrastructure of Samba4 continues
48 In Kerberos, we have continued to track the development of the
49 Heimdal Kerberos implementation, and reduce the custom diff between
50 our branch and upstream. Heimdal now provides plug-in APIs for
51 almost all of the hooks we need, including management and validation
54 In testing, our test infrastructure has undergone a quiet
55 revolution, as we improve our unit test framework. Likewise, the
56 tests themselves have continued to expand, as we follow our
57 test-driven development pattern.
59 In providing an abstraction above our raw RPC layer, the libnet
60 library continues to expand, becoming a C and JS management API for
61 Samba4 and remote servers.
63 To ensure that, as an administrator and developer, you can easily
64 read and edit our internal databases, our LDB layer has been
65 optimised for speed. The aim here is to avoid needing to use the faster, but
66 more opaque, TDB layer.
68 These are just some of the highlights of the work done in the past few
69 months. More details can be found in our SVN history.