1CEPH-DIFF-SORTED(8)                  Ceph                  CEPH-DIFF-SORTED(8)
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NAME

6       ceph-diff-sorted - compare two sorted files line by line
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SYNOPSIS

9       ceph-diff-sorted file1 file2
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DESCRIPTION

13       ceph-diff-sorted  is  a  simplifed diff utility optimized for comparing
14       two files with lines that are lexically sorted.
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16       The output is simplified in comparison to that  of  the  standard  diff
17       tool  available in POSIX systems. Angle brackets ('<' and '>') are used
18       to show lines that appear in one file but not the other. The output  is
19       not compatible with the patch tool.
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21       This  tool  was created in order to perform diffs of large files (e.g.,
22       containing billions of lines) that the standard diff tool cannot handle
23       efficiently.  Knowing  that the lines are sorted allows this to be done
24       efficiently with minimal memory overhead.
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26       The sorting of each file needs to be done lexcially. Most POSIX systems
27       use  the LANG environment variable to determine the sort tool's sorting
28       order. To sort lexically we would need something such as:
29          $ LANG=C sort some-file.txt >some-file-sorted.txt
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EXAMPLES

32       Compare two files:
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34          $ ceph-diff-sorted fileA.txt fileB.txt
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EXIT STATUS

37       When complete, the exit status will be set to one of the following:
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39       0      files same
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41       1      files different
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43       2      usage problem (e.g., wrong number of command-line arguments)
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45       3      problem opening input file
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47       4      bad file content (e.g., unsorted order or empty lines)
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AVAILABILITY

50       ceph-diff-sorted is part of Ceph, a  massively  scalable,  open-source,
51       distributed  storage system.  Please refer to the Ceph documentation at
52       http://ceph.com/docs for more information.
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SEE ALSO

55       rgw-orphan-list(8)
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58       2010-2021, Inktank Storage, Inc. and contributors. Licensed under  Cre‐
59       ative Commons Attribution Share Alike 3.0 (CC-BY-SA-3.0)
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64dev                              Sep 28, 2021              CEPH-DIFF-SORTED(8)
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