hadd(1) | General Commands Manual | hadd(1) |
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]
[-f[0-9] F[0_9]] [-fk FK] [-ff FF] [-f0 F0] [-f6 F6]
TARGET SOURCES
DESCRIPTION
This program will add histograms, trees and other objects 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
- Force overwriting of output file.
- -f[0-9]
- 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
- supported range of values)
- TARGET
- Target file
- SOURCES
- Source files