07-19-2007
moving large number of files
I have a task to move more than 35000 files every two hours, from the same directory to another directory based on a file that has the list of filenames
I tried the following logics
(1)
find . -name \*.dat > list
for i in `cat list` do mv $i test/ done
(2)
cat list|xargs -i mv "{}" test/
logic 1 takes 40mins and logic 2 in 25 mins
Is there any other faster way I can move files based on a file that has the list of filenames.
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LEARN ABOUT CENTOS
test::manifest
Manifest(3) User Contributed Perl Documentation Manifest(3)
NAME
Test::Manifest - interact with a t/test_manifest file
SYNOPSIS
# in Makefile.PL
eval "use Test::Manifest";
# in the file t/test_manifest, list the tests you want
# to run
DESCRIPTION
"Test::Harness" assumes that you want to run all of the .t files in the t/ directory in ascii-betical order during "make test" unless you
say otherwise. This leads to some interesting naming schemes for test files to get them in the desired order. This interesting names
ossify when they get into source control, and get even more interesting as more tests show up.
"Test::Manifest" overrides the default behaviour by replacing the test_via_harness target in the Makefile. Instead of running at the t/*.t
files in ascii-betical order, it looks in the t/test_manifest file to find out which tests you want to run and the order in which you want
to run them. It constructs the right value for MakeMaker to do the right thing.
In t/test_manifest, simply list the tests that you want to run. Their order in the file is the order in which they run. You can comment
lines with a "#", just like in Perl, and "Test::Manifest" will strip leading and trailing whitespace from each line. It also checks that
the specified file is actually in the t/ directory. If the file does not exist, it does not put its name in the list of test files to run
and it will issue a warning.
Optionally, you can add a number after the test name in test_manifest to define sets of tests. See "get_t_files" for more information.
Functions
run_t_manifest( TEST_VERBOSE, INST_LIB, INST_ARCHLIB, TEST_LEVEL )
Run all of the files in t/test_manifest through Test::Harness:runtests in the order they appear in the file.
eval "use Test::Manifest";
get_t_files( [LEVEL] )
In scalar context it returns a single string that you can use directly in WriteMakefile(). In list context it returns a list of the
files it found in t/test_manifest.
If a t/test_manifest file does not exist, get_t_files() returns nothing.
get_t_files() warns you if it can't find t/test_manifest, or if entries start with "t/". It skips blank lines, and strips Perl style
comments from the file.
Each line in t/test_manifest can have three parts: the test name, the test level (a floating point number), and a comment. By default,
the test level is 1.
test_name.t 2 #Run this only for level 2 testing
Without an argument, get_t_files() returns all the test files it finds. With an argument that is true (so you can't use 0 as a level)
and is a number, it skips tests with a level greater than that argument. You can then define sets of tests and choose a set to run. For
instance, you might create a set for end users, but also add on a set for deeper testing for developers.
Experimentally, you can include a command to grab test names from another file. The command starts with a ";" to distinguish it from a
true filename. The filename (currently) is relative to the current working directory, unlike the filenames, which are relative to "t/".
The filenames in the included are still relative to "t/".
;include t/file_with_other_test_names.txt
Also experimentally, you can stop Test::Manifest from reading filenames with the ";skip" directive. Test::Harness will skip the
filenames up to the ";unskip" directive (or end of file)
run_this1
;skip
skip_this
;unskip
run_this2
To select sets of tests, specify the level in the variable TEST_LEVEL during `make test`.
make test # run all tests no matter the level
make test TEST_LEVEL=2 # run all tests level 2 and below
make_test_manifest()
Creates the test_manifest file in the t directory by reading the contents of the t directory.
TO DO: specify tests in argument lists.
TO DO: specify files to skip.
manifest_name()
Returns the name of the test manifest file, relative to t/
SOURCE AVAILABILITY
This source is in Github:
http://github.com/briandfoy/Test-Manifest/tree/master
CREDITS
Matt Vanderpol suggested and supplied a patch for the ;include feature.
AUTHOR
brian d foy, "<bdfoy@cpan.org>"
COPYRIGHT AND LICENSE
Copyright (c) 2002-2009 brian d foy. All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.16.3 2009-07-17 Manifest(3)