01-21-2005
Speed of mv vs. cp
Hi,
Is mv (move) command quicker than cp (copy command)?
I have large files and I want to know if mv actually copy the data to a new file then deletes the old or whether it just alters information the file system without physically moving data - Unfortuanately I don't have large files to test with...
Thanks.
GMMIKE
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I wonder, are there any "tricks" to increase my server's access time in general? (4 Replies)
Discussion started by: pappous
4 Replies
2. HP-UX
Background;
FTP-ing a small 210K file to a HP7410 attached to a EVA500 the averaging speed 400KB/s
FTP-ing a small 210K file to a K570 the average speed is 4500KB/s
FTP-ing a 31MB file to a HP7410 attached to a EVA 5000 the average speed is 5500KB/s
FTP-ing a 31MB file to a K570 the average... (3 Replies)
Discussion started by: ottof
3 Replies
3. Filesystems, Disks and Memory
Hello,
I have a Supermicro server with a P4SCI mother board running Debian Sarge 3.1. This is the "dmidecode" output related to RAM info:
RAM speed information is incomplete.. "Current Speed: Unknown", is there anyway/soft to get the speed of installed RAM modules? thanks!!
Regards :)... (0 Replies)
Discussion started by: Santi
0 Replies
4. Shell Programming and Scripting
How would one go about optimizing this current .sh program so it works at a more minimal time. Such as is there a better way to count what I need than what I have done or better way to match patterns in the file? Thanks,
#declare variables to be used.
help=-1
count=0
JanCount=0
FebCount=0... (3 Replies)
Discussion started by: switch
3 Replies
5. Shell Programming and Scripting
Hi
I need a command to know how many processors are available and what is their speed in UNIX.
Thanks (2 Replies)
Discussion started by: diksha2207
2 Replies
6. Filesystems, Disks and Memory
I analysed disk performance with blktrace and get some data:
read:
8,3 4 2141 2.882115217 3342 Q R 195732187 + 32
8,3 4 2142 2.882116411 3342 G R 195732187 + 32
8,3 4 2144 2.882117647 3342 I R 195732187 + 32
8,3 4 2145 ... (1 Reply)
Discussion started by: W.C.C
1 Replies
7. Shell Programming and Scripting
Hi,
Im quite new to scripting and would like a bit of assistance with trying to speed up the following script. At the moment it is quite slow....
Any way to improve it?
total=111120
while
do
total=`expr $total + 1`
INCREMENT=$total
firstline = "blablabla"
secondline = "blablabla"... (5 Replies)
Discussion started by: brunlea
5 Replies
8. Programming
Which one is faster among malloc and new?
My understanding is that since new also has to call constructors after allocating memory it must be slower than malloc.
Am I correct? (1 Reply)
Discussion started by: rupeshkp728
1 Replies
9. Shell Programming and Scripting
Hi,
I have to grep string from 20 - 30 files each carries 200 - 300 MB size and append to the
file. How to speed the
grepping time.
cat catalina.out_2012_01_01 | grep "xxxxx" >> backup.txt
PLZ, Suggest me,
Regards,
Nanthagopal A (5 Replies)
Discussion started by: nanthagopal
5 Replies
10. Shell Programming and Scripting
hey guys i have a perl script wich use to compare hashes but it tookes a long time to do that so i wich i will have the soulition to do it soo fast
he is the code
<redacted> (1 Reply)
Discussion started by: benga
1 Replies
MRENAME(1) General Commands Manual MRENAME(1)
NAME
mrename - program to rename files
SYNOPSIS
mrename 'pattern' prefix [option]
DESCRIPTION
This manual page documents briefly the mrename command. This manual page was written for the Debian GNU/Linux distribution because the
original program does not have a manual page.
mrename is a tool for easy and automatic renaming of many files. The 'pattern' is the pattern to search files to rename (quoted to avoid
that bash resolve it), and prefix is the prefix that will be added to the name of each file. The two alternative options for copying or
moving files in the new name are explained below. All parameters are needed, and you have to stay and launch the script in the same direc-
tory of the files to be renamed. The program should be able to write in this directory.
OPTIONS
There are only the following three options.
-c The option -c will copy each file with the new filename.
-m The option -m will move each file in the new filename.
-h Display help.
EXAMPLE
If you have a directory with two jpeg images prof.jpg and forp.jpg and you want to add them a prefix like item0, item1 etc.. (that is
item0prof.jpg, item1forp.jpg etc..) do this:
cd /path/to/the/images
mrename '*.jpg' item -c
to copy each matching file into another with the new name
mrename '*.jpg' item -m
to rename each file without keeping a copy with the previous name
Word-Wide-Web:
http://alfalinux.sourceforge.net/mrename.php3
AUTHOR
:
Giancarlo -rofus- Erra
e-mail: rofus@mindless.com
This manual page was written by Dr. Guenter Bechly <gbechly@debian.org>, for the Debian GNU/Linux system (but may be used by others). It is
distributed under the GPL just like mrename itself.
October 22, 2000 MRENAME(1)