hadd - Man Page
Synopsis
usage: hadd [-a A] [-k K] [-T T] [-O O] [-v V] [-j J] [-dbg DBG] [-d D] [-n N]
[-cachesize CACHESIZE]
[-experimental-io-features EXPERIMENTAL_IO_FEATURES] [-f F]
[-fk FK] [-ff FF] [-f0 F0] [-f6 F6]
TARGET SOURCES
Description
This program will add histograms from a list of root files and write them to a target root file.
The target file is newly created and must not exist, or if -f ("force") is given, must not be one of the source files.
Options
- -a
Append to the output
- -k
Skip corrupt or non-existent files, do not exit
- -T
Do not merge Trees
- -O
Re-optimize basket size when merging TTree
- -v
Explicitly set the verbosity level: 0 request no output, 99 is the default
- -j
Parallelize the execution in multiple processes
- -dbg
Parallelize the execution in multiple processes in debug mode (Does not delete partial files stored inside working directory)
- -d
Carry out the partial multiprocess execution in the specified directory
- -n
Open at most 'maxopenedfiles' at once (use 0 to request to use the system maximum)
- -cachesize
Resize the prefetching cache use to speed up I/O operations(use 0 to disable)
- -experimental-io-features
Used with an argument provided, enables the corresponding experimental feature for output trees
- -f
Gives the ability to specify the compression level of the target file(by default 4)
- -fk
Sets the target file to contain the baskets with the same compression
as the input files (unless -O is specified). Compresses the meta data
using the compression level specified in the first input or the
compression setting after fk (for example 206 when using -fk206)
- -ff
The compression level use is the one specified in the first input
- -f0
Do not compress the target file
- -f6
Use compression level 6. (See TFile::SetCompressionSettings for the support range of value.)
- TARGET
Target file
- SOURCES
Source files