2 .\" Title: amanda-compatibility
3 .\" Author: Dustin J. Mitchell <dustin@zmanda.com>
4 .\" Generator: DocBook XSL Stylesheets vsnapshot_8273 <http://docbook.sf.net/>
6 .\" Manual: Miscellanea
7 .\" Source: Amanda 3.1.0
10 .TH "AMANDA\-COMPATIBILIT" "7" "06/01/2010" "Amanda 3\&.1\&.0" "Miscellanea"
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22 amanda-compatibility \- Compatibility between Amanda versions
23 .SH "NETWORK COMPATIBILITY"
25 Amanda has used several on\-the\-wire protocols to communicate between the server and backup clients, and not all of them have been compatible\&.
27 Versions of Amanda prior to about 2\&.3 used a different protocol which is not compatible\&. 2\&.3 is very old so this is not of general interest\&.
29 The Amanda 2\&.4 series all use the same protocol\&. This protocol has support for extensibility\&. Generally upgrading clients or servers along the 2\&.4 branch does not cause difficulty\&.
31 Amanda 2\&.5\&.0 uses the same protocol as 2\&.4\&. One can use a 2\&.5\&.0 server with 2\&.4 clients and a 2\&.4 server with 2\&.5\&.0 clients\&.
33 Kerberos4 authentication in 2\&.5 is compatible with 2\&.4\&. In 2\&.5, kerberos4 encryption is broken, at least for the server\&.
35 Amanda 2\&.5\&.1 introduced a new recover protocol\&. Backup communication works with any combination of versions, but 2\&.5\&.1\'s amrecover cannot communicate with an older server\&. Use oldamrecover on 2\&.5\&.1 and higher clients when communicating with an older server\&.
37 Amanda 2\&.6\&.0 and later are completely compatible with 2\&.5\&.1\&.
39 To restore a dump created with the tapesplit_size option using amrecover, you need at least a 2\&.5 server and late\-2\&.4 client\&. (Extracting that backup using only shell, mt and dd is also possible\&.)
42 The recommended course for Amanda upgrades is to upgrade the server first, and test backups and restores before upgrading clients\&. Consult the changes described below for the relevant span of versions to determine what adjustments, if any, are required\&. Also see the NEWS file shipped with each Amanda release for more detailed information\&.
45 Although it is a significant rewrite, there are no incompatible changes in this release\&.
47 Old\-style changer scripts are deprecated in this release\&. While they remain available, they may be removed in a future release\&. Consider upgrading to one of the new changer scripts\&. Users of
49 are particularly encouraged to consider the much more intelligent
50 \fIchg\-robot\fR\&. See
51 \fBamanda-changers\fR(7)
52 for more information\&.
54 The following configuration configration keywords are deprecated\&. This is currently a warning, but will become an error soon\&.
70 .SS "Amanda 2\&.6\&.1"
72 There are no incompatible changes in this release, but consider switching to some of the new applications instead of the old GNUTAR and DUMP programs\&.
74 The following configuration configration keywords are deprecated\&. This is currently a warning, but will become an error soon\&.
86 device\-output\-buffer\-size
113 \- this is no longer optional, and all files are padded
117 .SS "Amanda 2\&.6\&.0"
122 are removed and replaced with
123 \fBamcheckdump\fR(8)\&. Both
129 Some Amanda files are now installed in new
131 subdirectories: libraries are now installed in
133 and internal programs are now installed in
134 $libexecdir/amanda\&.
136 The amandates file, previously at
137 /etc/amandates, is now at
138 $localstatedir/amanda/amandates\&. You may want to move your existing
140 when you upgrade Amanda\&.
142 GLib is now required to build and run Amanda\&.
149 : http://wiki.zmanda.com/
152 \fBDustin J\&. Mitchell\fR <\&dustin@zmanda\&.com\&>
154 Zmanda, Inc\&. (http://www\&.zmanda\&.com)