Availability: ncea, ncecat, ncra, ncrcat Short options: ‘-H’ Long options: ‘--fl_lst_in’, ‘--file_list’ |
history
attribute no longer contains the exact command by which the file
was created.
NCO solves this dilemma by archiving input file list
attributes.
When the input file list to a multi-file operator is specified
via stdin
, the operator, by default, attaches two global
attributes to any file they create or modify.
The nco_input_file_number
global attribute contains the number of
input files, and nco_input_file_list
contains the file names,
specified as standard input to the multi-file operator.
This information helps to verify that all input files the user thinks
were piped through stdin
actually arrived.
Without the nco_input_file_list
attribute, the information is lost
forever and the “chain of evidence” would be broken.
The ‘-H’ switch overrides (turns off) the default behavior of
writing the input file list global attributes when input is from
stdin
.
The ‘-h’ switch does this too, and turns off the history
attribute as well (see History Attribute).
Hence both switches allows space-conscious users to avoid storing what
may amount to many thousands of filenames in a metadata attribute.