1ZCK_DELTA_SIZE(1)         BSD General Commands Manual        ZCK_DELTA_SIZE(1)
2

NAME

4     zck_delta_size — calculate the differences between two zchunk files
5

SYNOPSIS

7     zck_delta_size [-v | --verbose] file1 file2
8     zck_delta_size -? | --help | --usage | --version
9

DESCRIPTION

11     The zck_delta_size utility examines two zchunk compressed files and
12     determines how similar they are: how many chunks are the same between the
13     files, so that tools like e.g.  rsync(1) or zckdl(1) could only transfer
14     the small parts that differ instead of the full files.  This is espe‐
15     cially useful for structured files that have been compressed using the
16     zck(1) tool's -s (--split) option.
17
18     The zck_delta_size utility accepts the following optional arguments:
19
20     -v, --verbose
21             Verbose operation; display some diagnostic output.
22
23     -?, --help
24             Display program usage information and exit.
25
26     --usage
27             Display brief program usage information and exit.
28
29     --version
30             Display program version information and exit.
31

EXIT STATUS

33     The zck_delta_size utility exits 0 on success, and >0 if an error occurs.
34

EXAMPLES

36     Examine two zchunk files:
37
38           zck_delta_size doc1.txt.zck doc2.txt.zck
39

SEE ALSO

41     unzck(1), zck(1), zck_gen_zdict(1), zck_read_header(1), zckdl(1)
42

AUTHOR

44     The zck_delta_size utility was written by Jonathan Dieter
45     <jdieter@gmail.com>.  This manual page stub was written by Peter Pentchev
46     <roam@ringlet.net>.
47
48BSD                              May 31, 2020                              BSD
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