It should run a lot faster because it runs head for groups of files instead of having to run head for each file to be processed. The fork() and exec*() system calls needed to invoke head are expensive, relatively slow operations.
But, this assumes that a lot of files have names starting with star_st.
If . is on a remote filesystem, network issues could also have a significant impact.
Is there other heavy load on the system?
How big is the file hierarchy rooted in .?
How many files have names starting with star_st?
This User Gave Thanks to Don Cragun For This Post:
It should run a lot faster because it runs head for groups of files instead of having to run head for each file to be processed. The fork() and exec*() system calls needed to invoke head are expensive, relatively slow operations.
But, this assumes that a lot of files have names starting with star_st.
If . is on a remote filesystem, network issues could also have a significant impact.
Is there other heavy load on the system?
How big is the file hierarchy rooted in .?
How many files have names starting with star_st?
Hi, I have 99583 files in the directory with start_st
Code:
ls -l start_st* | wc -l
99583
I m on Linux
Code:
uname -a
Linux my_machine1 2.6.32-431.5.1.el6.x86_64 #1 SMP Fri Jan 10 14:46:43 EST 2014 x86_64 x86_64 x86_64 GNU/Linux
Is there other heavy load on the system? Answer: No
How big is the file hierarchy rooted in .? All the files are in the same directory.Answer: There are NO subdirectories.
If . is on a remote filesystem, network issues could also have a significant impact.: Answer: It is on the same Local File System.
Last edited by mohtashims; 05-19-2015 at 06:07 AM..
It is depends on from which directory you are executing this find command and the number of files exists on your machine with the name of "star_st*".
if that . is / (root directory) and if your machine is configured with automount then it will try to mount all the auto mount filesystems and will perform find operation on them.
Last edited by subrkann; 05-19-2015 at 04:31 AM..
Reason: Unexpected code format.
How big is the file hierarchy rooted in . ? All the files are in the same directory.Answer: There are NO subdirectories.
Hello mohtashims,
Could you please try following command and let me know if this helps.
According to your statement alll files are in same directory without any sub directories so following may help you then.
I have many files which contain about two million lines.
Now I want to use sed to delete the 9th line and add a new
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for((i=1;i<100;i++));
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echo $i;
sed -i '9d' $i.dat;
sed -i '8a this is a new line' $i.dat;
done
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I have a large number of input files with two columns of numbers.
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83 1453
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83 175
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Dear All,
I am using the following script to find and replace the date format in a file. The field18 in the file has the following format: "01/26/2010 11:55:14 GMT+04:00" which I want to convert into the following format "20100126115514" for this purpose I am using the following lines of codes:... (5 Replies)
Dear World,
I just wrote a script, which puzzled me somewhat. The siginficant code was:
for file in `ls splits*`; # splits* came from a split command executed earlier
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The interesting thing is this: A few of the $files were... (2 Replies)
All of the sudden scp got really slow ... from 2-3 seconds to 30 seconds.
This happened for 5 hours, and then it went back to running fast.
Why?
If I use the -q qualifier which "Disables the progress meter" could this have any adverse effect?
Thanks (1 Reply)
Hi,
I have an SCO-Unix server running.
There are some processes (unknown to me) which consume a lot of the system resources. This slows down the server dramatically.
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Discussion started by: Hansaplast
3 Replies
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05-18-2015
Command very Slow
