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AMANDA-COMPATIBILIT(7)		  Miscellanea		AMANDA-COMPATIBILIT(7)

NAME
       amanda-compatibility - Compatibility between Amanda versions

NETWORK COMPATIBILITY
       Amanda has used several on-the-wire protocols to communicate between
       the server and backup clients, and not all of them have been
       compatible.

       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.

       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.

       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.

       Kerberos4 authentication in 2.5 is compatible with 2.4. In 2.5,
       kerberos4 encryption is broken, at least for the server.

       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.

       Amanda 2.6.0 and later are completely compatible with 2.5.1.

       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.)

UPGRADES
       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.

   Amanda 3.2
       The following configuration configration keywords are deprecated. This
       is currently a warning, but will become an error soon.

       ·   amrecover-do-fsf - amrecover always seeks to files when recovering

       ·   amrecover-check-label - amrecover always checks the volume label
	   when recovering

       ·   Dumptype parameters tape-splitsize, split-diskbuffer, and
	   fallback-splitsize - see allow-split and tapetype parameters
	   part-size, part-cache-type, part-cache-dir, and
	   part-cache-max-size. See amanda.conf(5) for more information on
	   these new parameters, noting particularly that all but the first
	   are tapetype parameters, not dumptype parameters.

	   To convert most cases to the new parameters, set part-size to the
	   old value of tape-splitsize and part-cache-dir to the old value of
	   split-diskbuffer, if present. If split-diskbuffer was set, then set
	   part-cache-type to disk, otherwise memory. Finally, if using memory
	   caching, set part-cache-max-size to the previous value of
	   fallback-splitsize. Be sure to remove all of the old keywords from
	   your configuration.

   Amanda 3.1
       Although it is a significant rewrite, there are no incompatible changes
       in this release.

       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 chg-zd-mtx are
       particularly encouraged to consider the much more intelligent
       chg-robot. See amanda-changers(7) for more information.

       The following configuration configration keywords are deprecated. This
       is currently a warning, but will become an error in a future version.

       ·   label_new_tapes - use autolabel

   Amanda 2.6.1
       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.

       The following configuration configration keywords are deprecated. This
       is currently a warning, but will become an error soon.

       ·   tapebufs - use device-output-buffer-size instead

       ·   rawtapedev - use tapedev instead

       ·   file-pad - this is no longer optional, and all files are padded

   Amanda 2.6.0
       amverify and amverifyrun are removed and replaced with amcheckdump(8).
       Both amdd and ammt are removed.

       Some Amanda files are now installed in new amanda/ subdirectories:
       libraries are now installed in $libdir/amanda and internal programs are
       now installed in $libexecdir/amanda.

       The amandates file, previously at /etc/amandates, is now at
       $localstatedir/amanda/amandates. You may want to move your existing
       /etc/amandates when you upgrade Amanda.

       GLib is now required to build and run Amanda.

SEE ALSO
       amanda(8), amanda.conf(5)

       The Amanda Wiki: : http://wiki.zmanda.com/

AUTHOR
       Dustin J. Mitchell <dustin@zmanda.com>
	   Zmanda, Inc. (http://www.zmanda.com)

Amanda 3.3.3			  01/10/2013		AMANDA-COMPATIBILIT(7)
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