10-02-2018
How big are your files, how long do they take, and how fast is your disk? If you're hitting throughput limits optimizing your programs won't help one iota. If you're not, however, you can process several files at once for large gains.
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1. Shell Programming and Scripting
hii everyone ,
i have a file in which i have line numbers.. file name is file1.txt
aa bb cc "12" qw
xx yy zz "23" we
bb qw we "123249" jh
here 12,23,123249. is the line number
now according to this line numbers we have to print lines from other file named... (11 Replies)
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2. Programming
Hi,
I'm trying to figure out the best solution to the following problem, and I'm not
yet that much experienced like you. :-)
Basically I have to read a fairly large file, composed of "messages" , in order
to display all of them through an user interface (made with QT).
The messages that... (3 Replies)
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3. AIX
We just set up a system to use large pages. I want to know if there is a command to see how much of the memory is being used for large pages. For example if we have a system with 8GB of RAm assigned and it has been set to use 4GB for large pages is there a command to show that 4GB of the *GB is... (1 Reply)
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4. Shell Programming and Scripting
Hello
I have the following files
VOICE_hhhh
SUBSCR_llll
DEL_kkkk
Consider that there are 1000 VOICE files+1000 SUBSCR files+1000DEL files
When i try to tar these files using
tar -cvf backup.tar VOICE* SUBSCR* DEL*
i get the error:
ksh: /usr/bin/tar: arg list too long
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Discussion started by: chriss_58
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5. Emergency UNIX and Linux Support
Hello,
Error
awk: Internal software error in the tostring function on TS1101?05044400?.0085498227?0?.0011041461?.0034752266?.00397045?0?0?0?0?0?0?11/02/10?09/23/10???10?no??0??no?sct_det3_10_20110516_143936.txt
What it is
It is a unix shell script that contains an awk program as well as... (4 Replies)
Discussion started by: script_op2a
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6. Shell Programming and Scripting
Hi All,
I have some 80,000 files in a directory which I need to rename. Below is the command which I am currently running and it seems, it is taking fore ever to run this command. This command seems too slow. Is there any way to speed up the command. I have have GNU Parallel installed on my... (6 Replies)
Discussion started by: shoaibjameel123
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7. Shell Programming and Scripting
awk "/May 23, 2012 /,0" /var/tmp/datafile
the above command pulls out information in the datafile. the information it pulls is from the date specified to the end of the file.
now, how can i make this faster if the datafile is huge? even if it wasn't huge, i feel there's a better/faster way to... (8 Replies)
Discussion started by: SkySmart
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8. Shell Programming and Scripting
I have script like below, who is picking number from one file and and searching in another file, and printing output.
Bu is is very slow to be run on huge file.can we modify it with awk
#! /bin/ksh
while read line1
do
echo "$line1"
a=`echo $line1`
if
then
echo "$num"
cat file1|nawk... (6 Replies)
Discussion started by: mirwasim
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9. Shell Programming and Scripting
This basic code works.
I have a very long list, almost 10000 lines that I am building into the array. Each line has either 2 or 3 fields as shown in the code snippit. The array elements are static (for a few reasons that out of scope of this question) the list has to be "built in".
It... (5 Replies)
Discussion started by: sumguy
5 Replies
10. Shell Programming and Scripting
I have the below command which is referring a large file and it is taking 3 hours to run. Can something be done to make this command faster.
awk -F ',' '{OFS=","}{ if ($13 == "9999") print $1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12 }' ${NLAP_TEMP}/hist1.out|sort -T ${NLAP_TEMP} |uniq>... (13 Replies)
Discussion started by: Peu Mukherjee
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LEARN ABOUT HPUX
prealloc
prealloc(1) General Commands Manual prealloc(1)
NAME
prealloc - preallocate disk storage
SYNOPSIS
name size
DESCRIPTION
preallocates at least size bytes of disk space for an ordinary file name, creating the file if name does not already exist. The space is
allocated in an implementation-dependent fashion for fast sequential reads and writes of the file.
fails and no disk space is allocated if name already exists and is not an ordinary file of zero length, if insufficient space is left on
disk, or if size exceeds the maximum file size or the file size limit of the process (see ulimit(2)). The file is zero-filled.
DIAGNOSTICS
returns one of the following values upon completion:
0 Successful completion.
1 name already exists and is not an ordinary file of zero length.
2 There is insufficient room on the disk.
3 size exceeds file size limits.
EXAMPLES
The following example preallocates 50000 bytes for the file
WARNINGS
Allocation of file space is highly dependent on current disk usage. A successful return does not indicate how fragmented the file actually
might be if the disk is approaching its capacity.
AUTHOR
was developed by HP.
SEE ALSO
prealloc(2), ulimit(2).
prealloc(1)