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btrbk: add support for zstandard (zstd) compression

pull/370/head
Lukas Straub 2020-12-23 23:11:41 +01:00 committed by Axel Burri
parent 3adf2f873b
commit 3562e75a70
3 changed files with 6 additions and 4 deletions
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1
btrbk
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@ -54,6 +54,7 @@ my %compression = (
xz => { name => 'xz', format => 'xz', compress_cmd => [ 'xz', '-c' ], decompress_cmd => [ 'xz', '-d', '-c' ], level_min => 0, level_max => 9, threads => '-T' }, xz => { name => 'xz', format => 'xz', compress_cmd => [ 'xz', '-c' ], decompress_cmd => [ 'xz', '-d', '-c' ], level_min => 0, level_max => 9, threads => '-T' },
lzo => { name => 'lzo', format => 'lzo', compress_cmd => [ 'lzop', '-c' ], decompress_cmd => [ 'lzop', '-d', '-c' ], level_min => 1, level_max => 9 }, lzo => { name => 'lzo', format => 'lzo', compress_cmd => [ 'lzop', '-c' ], decompress_cmd => [ 'lzop', '-d', '-c' ], level_min => 1, level_max => 9 },
lz4 => { name => 'lz4', format => 'lz4', compress_cmd => [ 'lz4', '-c' ], decompress_cmd => [ 'lz4', '-d', '-c' ], level_min => 1, level_max => 9 }, lz4 => { name => 'lz4', format => 'lz4', compress_cmd => [ 'lz4', '-c' ], decompress_cmd => [ 'lz4', '-d', '-c' ], level_min => 1, level_max => 9 },
zstd => { name => 'zstd', format => 'zst', compress_cmd => [ 'zstd', '-c' ], decompress_cmd => [ 'zstd', '-d', '-c' ], level_min => 1, level_max => 19, threads => '-T' },
); );
my $compress_format_alt = join '|', map { $_->{format} } values %compression; # note: this contains duplicate alternations my $compress_format_alt = join '|', map { $_->{format} } values %compression; # note: this contains duplicate alternations

7
doc/btrbk.conf.5.asciidoc
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@ -290,7 +290,7 @@ option in ssh_config(5).
remote locations. Defaults to ``no''. If enabled, make sure that remote locations. Defaults to ``no''. If enabled, make sure that
'<compress_command>' is available on the source and target '<compress_command>' is available on the source and target
hosts. Supported '<compress_command>': gzip, pigz, bzip2, pbzip2, hosts. Supported '<compress_command>': gzip, pigz, bzip2, pbzip2,
xz, lzo, lz4. xz, lzo, lz4, zstd.
*stream_compress_level* default|<number>:: *stream_compress_level* default|<number>::
Compression level for the specified '<compress_command>'. Refer to Compression level for the specified '<compress_command>'. Refer to
@ -300,7 +300,7 @@ option in ssh_config(5).
*stream_compress_threads* default|<number>:: *stream_compress_threads* default|<number>::
Number of threads to use for <compress_command>. Only supported Number of threads to use for <compress_command>. Only supported
for "pigz", "pbzip2" and recent versions of "xz". for "pigz", "pbzip2", "zstd" and recent versions of "xz".
*stream_buffer* <size>|no:: *stream_buffer* <size>|no::
Add a buffer to the btrfs send stream (locally, on uncompressed Add a buffer to the btrfs send stream (locally, on uncompressed
@ -565,7 +565,8 @@ Additional options for raw targets:
*raw_target_compress* <compress_command>|no:: *raw_target_compress* <compress_command>|no::
Compression algorithm to use for raw backup target. Supported Compression algorithm to use for raw backup target. Supported
'<compress_command>': gzip, pigz, bzip2, pbzip2, xz, lzo, lz4. '<compress_command>': gzip, pigz, bzip2, pbzip2, xz, lzo, lz4,
zstd.
*raw_target_compress_level* default|<number>:: *raw_target_compress_level* default|<number>::
Compression level for the specified <compress_command>. Compression level for the specified <compress_command>.
*raw_target_compress_threads* default|<number>:: *raw_target_compress_threads* default|<number>::

2
ssh_filter_btrbk.sh
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@ -12,7 +12,7 @@ allow_exact_list=
allow_rate_limit=1 allow_rate_limit=1
allow_stream_buffer=1 allow_stream_buffer=1
allow_compress=1 allow_compress=1
compress_list="gzip|pigz|bzip2|pbzip2|xz|lzop|lz4" compress_list="gzip|pigz|bzip2|pbzip2|xz|lzop|lz4|zstd"
# note that the backslash is NOT a metacharacter in a POSIX bracket expression! # note that the backslash is NOT a metacharacter in a POSIX bracket expression!
option_match='-[a-zA-Z0-9=-]+' # matches short as well as long options option_match='-[a-zA-Z0-9=-]+' # matches short as well as long options