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 [-f[0-9] F[0_9]] [-fk FK] [-ff FF] [-f0 F0] [-f6 F6]
11 TARGET SOURCES
12
13
15 This program will add histograms, trees and other objects from a list
16 of ROOT files and write them to a target ROOT file. The target file is
17 newly created and must not exist, or if -f ("force") is given, must not
18 be one of the source files.
19
21 -a Append to the output
22
23 -k Skip corrupt or non-existent files, do not exit
24
25 -T Do not merge Trees
26
27 -O Re-optimize basket size when merging TTree
28
29 -v Explicitly set the verbosity level: 0 request no output, 99 is
30 the
31
32 default
33
34 -j Parallelize the execution in multiple processes
35
36 -dbg Parallelize the execution in multiple processes in debug mode
37 (Does
38
39 not delete partial files stored inside working directory)
40
41 -d Carry out the partial multiprocess execution in the specified
42
43 directory
44
45 -n Open at most 'maxopenedfiles' at once (use 0 to request to use
46 the
47
48 system maximum)
49
50 -cachesize
51 Resize the prefetching cache use to speed up I/O operations(use
52 0 to
53
54 disable)
55
56 -experimental-io-features
57 Used with an argument provided, enables the corresponding exper‐
58 imental
59
60 feature for output trees
61
62 -f Force overwriting of output file.
63
64 -f[0-9]
65 Gives the ability to specify the compression level of the target
66 file
67
68 (by default 4)
69
70 -fk Sets the target file to contain the baskets with the same com‐
71 pression
72
73 as the input files (unless -O is specified). Compresses the meta
74 data
75
76 using the compression level specified in the first input or the
77
78 compression setting after fk (for example 206 when using -fk206)
79
80 -ff The compression level use is the one specified in the first in‐
81 put
82
83 -f0 Do not compress the target file
84
85 -f6 Use compression level 6 (see TFile::SetCompressionSettings for
86 the
87
88 supported range of values)
89
90 TARGET Target file
91
92 SOURCES
93 Source files
94
95
96
97 hadd(1)