In my C program i am using very large file(approx 400MB) to read parts of it frequently. But due to large file the performance of the program goes down very badly. It shows very high I/O usage and I/O wait time.
My question is, What are the ways to optimize or tune I/O on linux or how i can get... (10 Replies)
Hello Gurus,
We are facing some performance issue in UNIX. If someone had faced such kind of issue in past please provide your suggestions on this .
Problem Definition:
/Few of load processes of our Finance Application are facing issue in UNIX when they uses a shell script having below... (19 Replies)
Hi Gurus,
I am beginner in solaris and want to know what are the things we need to check for performance monitoring on our solairs OS.
for DISK,CPU and MEMORY.
Also how we do ipforwarding in slaris
Many thanks for your help
Pradeep P (4 Replies)
Hi All,
I have the following script which I use in Nagios to check the health of the applications, the problem with it is that the curl part ($TOTAL) does not return anything after running for 2-3 hrs, even though from command line the script runs fine but not from Nagios.
There are 17... (1 Reply)
hi I am having a performance issue with the following requirement
i have to create a permutation and combination on a set of three files
such that each record in each file is picked and the output is redirected in
a specific format but it is taking around 70 odd hours to prepare a
combination... (7 Replies)
I have 2 files; one file (say, details.txt) contains the details of employees and another file (say, emp.txt) has some selected employee names. I am extracting employee details from details.txt by using emp.txt and the corresponding code is:
while read line
do
emp_name=`echo $line`
grep -e... (7 Replies)
Hi,
We have 2 lpars on p6 blade. One of the lpar is having 3 core cpu with 5gb memory running sybase as database. An EOD process takes 25 min. to complete.
Now we have an lpar on P7 server with entitled cpu capacity of 2 with 16 Gb memory and sybase as database. The EOD process which takes... (17 Replies)
Hi,
I have created a shell script for Server Log Automation Process. I have used
find xargs grep command to search the string.
for Example,
find -name | xargs grep "816995225" > test.txt .
Here my problem is,
We have lot of records and we want to grep the string... (4 Replies)
Hi
We have an AIX5.3 server with application which is written in C. We are facing server (lpar) hangs intermediately. If we open new telnet window prompts for user and takes hell of a time to authenticate, not only that if we run ps -aef then also it takes lot of time. surprisingly there is no... (2 Replies)
Discussion started by: powerAIX
2 Replies
LEARN ABOUT V7
diff
DIFF(1) General Commands Manual DIFF(1)NAME
diff - differential file comparator
SYNOPSIS
diff [ -efbh ] file1 file2
DESCRIPTION
Diff tells what lines must be changed in two files to bring them into agreement. If file1 (file2) is `-', the standard input is used. If
file1 (file2) is a directory, then a file in that directory whose file-name is the same as the file-name of file2 (file1) is used. The
normal output contains lines of these forms:
n1 a n3,n4
n1,n2 d n3
n1,n2 c n3,n4
These lines resemble ed commands to convert file1 into file2. The numbers after the letters pertain to file2. In fact, by exchanging `a'
for `d' and reading backward one may ascertain equally how to convert file2 into file1. As in ed, identical pairs where n1 = n2 or n3 = n4
are abbreviated as a single number.
Following each of these lines come all the lines that are affected in the first file flagged by `<', then all the lines that are affected
in the second file flagged by `>'.
The -b option causes trailing blanks (spaces and tabs) to be ignored and other strings of blanks to compare equal.
The -e option produces a script of a, c and d commands for the editor ed, which will recreate file2 from file1. The -f option produces a
similar script, not useful with ed, in the opposite order. In connection with -e, the following shell program may help maintain multiple
versions of a file. Only an ancestral file ($1) and a chain of version-to-version ed scripts ($2,$3,...) made by diff need be on hand. A
`latest version' appears on the standard output.
(shift; cat $*; echo '1,$p') | ed - $1
Except in rare circumstances, diff finds a smallest sufficient set of file differences.
Option -h does a fast, half-hearted job. It works only when changed stretches are short and well separated, but does work on files of
unlimited length. Options -e and -f are unavailable with -h.
FILES
/tmp/d?????
/usr/lib/diffh for -h
SEE ALSO cmp(1), comm(1), ed(1)DIAGNOSTICS
Exit status is 0 for no differences, 1 for some, 2 for trouble.
BUGS
Editing scripts produced under the -e or -f option are naive about creating lines consisting of a single `.'.
DIFF(1)