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update CHANGES
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Changelog
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=========
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Version 1.0.0 (not released yet)
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--------------------------------
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The major release number change (0.x -> 1.x) indicates bigger incompatible
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changes, please read the compatibility notes carefully and adapt / test your
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scripts and carefully check your backup logs.
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Compatibility notes:
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- drop support for python 3.2 and 3.3, require 3.4 or 3.5, #221 #65 #490
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note: we provide binaries that include python 3.5.1 and everything else
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needed. they are an option in case you are stuck with < 3.4 otherwise.
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- change encryption to be on by default (using "repokey" mode)
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- remove support for --encryption=passphrase,
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use borg migrate-to-repokey to switch to repokey mode, #97
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- remove deprecated "--compression <number>",
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use --compression zlib,<number> instead
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in case of 0, you could also use --compression none
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- remove deprecated "--hourly/daily/weekly/monthly/yearly"
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use --keep-hourly/daily/weekly/monthly/yearly instead
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- remove deprecated "--do-not-cross-mountpoints",
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use --one-file-system instead
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- disambiguate -p option, #563:
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- -p now is same as --progress
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- -P now is same as --prefix
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- remove deprecated "borg verify",
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use borg extract --dry-run instead
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- cleanup environment variable semantics, #355
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the environment variables used to be "yes sayers" when set, this was
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conceptually generalized to "automatic answerers" and they just give their
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value as answer (as if you typed in that value when being asked).
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See the "usage" / "Environment Variables" section of the docs for details.
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- change the builtin default for --chunker-params, create 2MiB chunks, #343
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--chunker-params new default: 19,23,21,4095 - old default: 10,23,16,4096
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one of the biggest issues with borg < 1.0 (and also attic) was that it had a
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default target chunk size of 64kiB, thus it created a lot of chunks and thus
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also a huge chunk management overhead (high RAM and disk usage).
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please note that the new default won't change the chunks that you already
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have in your repository. the new big chunks do not deduplicate with the old
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small chunks, so expect your repo to grow at least by the size of every
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changed file and in the worst case (e.g. if your files cache was lost / is
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not used) by the size of every file (minus any compression you might use).
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in case you want to immediately see a much lower resource usage (RAM / disk)
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for chunks management, it might be better to start with a new repo than
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continuing in the existing repo (with an existing repo, you'ld have to wait
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until all archives with small chunks got pruned to see a lower resource
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usage).
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if you used the old --chunker-params default value (or if you did not use
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--chunker-params option at all) and you'ld like to continue using small
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chunks (and you accept the huge resource usage that comes with that), just
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explicitly use borg create --chunker-params=10,23,16,4095.
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New features:
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- borg migrate-to-repokey ("passphrase" -> "repokey" encryption key mode)
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Other changes:
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- suppress unneeded exception context (PEP 409), simpler tracebacks
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- removed special code needed to deal with imperfections / incompatibilities /
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missing stuff in py 3.2/3.3, simplify code that can be done simpler in 3.4
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- removed some version requirements that were kept on old versions because
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newer did not support py 3.2 any more
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- use some py 3.4+ stdlib code instead of own/openssl/pypi code:
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- use os.urandom instead of own cython openssl RAND_bytes wrapper, fixes #493
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- use hashlib.pbkdf2_hmac from py stdlib instead of own openssl wrapper
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- use hmac.compare_digest instead of == operator (constant time comparison)
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- use stat.filemode instead of homegrown code
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- use "mock" library from stdlib, #145
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- remove borg.support (with non-broken argparse copy), it is ok in 3.4+, #358
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- Vagrant: copy CHANGES.rst as symlink, #592
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Version 0.30.0
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--------------
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