1hadd(1) General Commands Manual hadd(1)
2
3
4
6 usage: hadd [-a A] [-k K] [-T T] [-O O] [-v V] [-j J] [-dbg DBG] [-d D]
7 [-n N]
8 [-cachesize CACHESIZE]
9 [-experimental-io-features EXPERIMENTAL_IO_FEATURES] [-f F]
10 [-fk FK] [-ff FF] [-f0 F0] [-f6 F6]
11 TARGET SOURCES
12
13
15 This program will add histograms from a list of root files and write
16 them to a target root file.
17
18 The target file is newly created and must not exist, or if -f ("force")
19 is given, must not be one of the source files.
20
21
22
24 -a Append to the output
25
26 -k Skip corrupt or non-existent files, do not exit
27
28 -T Do not merge Trees
29
30 -O Re-optimize basket size when merging TTree
31
32 -v Explicitly set the verbosity level: 0 request no output, 99 is
33 the default
34
35 -j Parallelize the execution in multiple processes
36
37 -dbg Parallelize the execution in multiple processes in debug mode
38 (Does not delete partial files stored inside working directory)
39
40 -d Carry out the partial multiprocess execution in the specified
41 directory
42
43 -n Open at most 'maxopenedfiles' at once (use 0 to request to use
44 the system maximum)
45
46 -cachesize
47 Resize the prefetching cache use to speed up I/O operations(use
48 0 to disable)
49
50 -experimental-io-features
51 Used with an argument provided, enables the corresponding exper‐
52 imental feature for output trees
53
54 -f Gives the ability to specify the compression level of the target
55 file(by default 4)
56
57 -fk Sets the target file to contain the baskets with the same com‐
58 pression
59
60 as the input files (unless -O is specified). Compresses the meta
61 data
62
63 using the compression level specified in the first input or the
64
65 compression setting after fk (for example 206 when using -fk206)
66
67 -ff The compression level use is the one specified in the first
68 input
69
70 -f0 Do not compress the target file
71
72 -f6 Use compression level 6. (See TFile::SetCompressionSettings for
73 the support range of value.)
74
75 TARGET Target file
76
77 SOURCES
78 Source files
79
80
81
82 hadd(1)