starting 2.7.x pre-release phase

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From: Denis Corbin <[email protected]>
To: DAR news mailing-list <[email protected]>
Message-ID: <b2368791-c861-6bf8-7063-4c4c29fbf3bd-GANU6spQydw@public.gmane.org>
Subject: starting 2.7.x pre-release phase

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Hello,

Pre-release phase has started for branch 2.7.x and will end with the
2.7.0 release in a few weeks.

You are welcome to participate to this last testing phase of a 2.7.x
branch of releases, by downloading, compiling and testing in your
environment the new features but also the old ones you were used to
use with current release as well as check the updated documentation.

For more info about pre-release phase check the details at
http://dar.linux.free.fr/pre-release/index.html

Follows an extract of the changelog

Cheers,
Denis

from 2.6.x to 2.7.0
- using the truncate system call whenever possible in place of skipping
  back in the archive when file need to resave uncompressed, file saved
  to be read from filesystem or when file has changed while it was read
  for backup
- improved slice name versus base name error, now substiting (rather
  than just asking the user) the first by the later when else it would
  lead to an execution error.
- added the possibility to specify a gnupg key by mean of its keyid in
  addition to the email address it may be associated to, both for
  asymmetrical encryption and archive signing.
- added -b option to dar_split to set the I/O block size
- added -r option to dar_split to limit the transfer rate
- added -c option to dar_split to limit the number of tape to read
- new feature: zstd compression algorithm added
- replaced old and experimental multi-threaded implementation, -G option
  now needs an argument on command line. New methods added in libdar API
  accordingly.
- added multi-threaded compression when using the new per block
  compression mode, the legacy streaming compression mode is still
  available (see both -G and -z option extended syntax).
- added lz4 compression algorithm.
- removed some deprecaded old options (--gzip,...)
- increased timestamp precision from microsecond to nanosecond when the
  operating system supports it. It is still possible to use configure's
  --enable-limit-time-accuracy=3Dus at compilation time to use microsecon=
d
  or even second accuracy even if the OS can support finer precision.
- added argon2 hashing algorithm for key derivation function (kdf) which
  becomes the default if libargon2 is available, else it defaults to
  sha1 as for 2.6.x. When argon2 is used and kdf default iteration count
  is reduced to 10,000 (and stays 200,000 with sha1). This can be tuned
  as usual with --kdf-param option.
- adding support for statx() under Linux which let libdar save file's
  birthtime. Unfortunately unlike under FSD systems (FreeBSD, MACoS X,
  and so on), the utime/utimes/timensat call do not set birthtime, so
  you can restore birthtime of Linux's file only under BSD systems
  today.
- AES becomes the default when gnupg is used without additional
  algorithm.
- new implementation of the libcurl API use for more efficient reuse of
  established sessions.
- new feature: dar_manager can now change the compression algorithm of
  an existing database



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