Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: File sort performance
Top Forums UNIX for Dummies Questions & Answers File sort performance Post 302955777 by jim mcnamara on Monday 21st of September 2015 12:57:56 PM
Old 09-21-2015
Some OS's have user-accessible RAM drives, or ssd drives mounpoints. MadeInGermany is trying to point out that sort uses disk I/O for files that big. TMPDIR or -T being the disk device where most of the sorting work happens. The fast -T directory is, the faster the sort will go.

What directory is mounted on an ssd or a fast SAN mountpoint or a RAM disk? Or even a SAS disk? I cannot tell positively what OS you are on. Please post the output of uname -a
 

10 More Discussions You Might Find Interesting

1. Programming

performance of writing into a file

Hi , I have a question about performance of writing into a file. Will it take more time to open a file, write a line into the file and close the file if the file size grows bigger and bigger?? Say, I have two files of sizes 100KB and 20MB. Will it take more time to open/write a... (1 Reply)
Discussion started by: shriashishpatil
1 Replies

2. News, Links, Events and Announcements

Announcing collectl - new performance linux performance monitor

About 4 years ago I wrote this tool inspired by Rob Urban's collect tool for DEC's Tru64 Unix. What makes this tool as different as collect was in its day is its ability to run at a low overhead and collect tons of stuff. I've expanded the general concept and even include data not available in... (0 Replies)
Discussion started by: MarkSeger
0 Replies

3. Programming

File - reading - Performance improvement

Hi All I am reading a huge file of size 2GB atleast. I am reading each line and cutting certain columns and writing it to another file. Here is the logic. int main() { string u_line; string Char_List; string u_file; int line_pos; string temp_form_u_file; ... (10 Replies)
Discussion started by: dhanamurthy
10 Replies

4. Shell Programming and Scripting

performance issue using gzcat, awk and sort

hi all, I was able to do a script to gather a few files and sort them. here it is: #!/usr/bin/ksh ls *mainFile* |cut -c20-21 | sort > temp set -A line_array i=0 file_name='temp' while read file_line do line_array=${file_line} let i=${i}+1 (5 Replies)
Discussion started by: naoseionome
5 Replies

5. UNIX for Dummies Questions & Answers

poor performance processing file with awk

Hello, I'm running a script on AIX to process lines in a file. I need to enclose the second column in quotation marks and write each line to a new file. I've come up with the following: #!/bin/ksh filename=$1 exec >> $filename.new cat $filename | while read LINE do echo $LINE | awk... (2 Replies)
Discussion started by: scooter53080
2 Replies

6. Shell Programming and Scripting

Performance issue in UNIX while generating .dat file from large text file

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)
Discussion started by: KRAMA
19 Replies

7. UNIX for Dummies Questions & Answers

I/O performance in HPUX file systems

Hi guys, what is the relation between I/O performance and file systems. I have a file systems called /dcs/data01 which is having 4Tb size. According our application we can split the file system like dcs/data01 -> 1Tb dcs/data02 -> 1Tb dcs/data03 -> 1Tb dcs/data04 -> 1Tb do you... (4 Replies)
Discussion started by: Davinzy
4 Replies

8. Shell Programming and Scripting

Slow performance filtering file

Please, I need help tuning my script. It works but it's too slow. The code reads an acivity log file with 50.000 - 100.000 lines and filters error messages from it. The data in the actlog file look similar to this: 02/08/2011 00:25:01,ANR2034E QUERY MOUNT: No match found using this criteria.... (5 Replies)
Discussion started by: Miila
5 Replies

9. UNIX for Advanced & Expert Users

Script to sort the files and append the extension .sort to the sorted version of the file

Hello all - I am to this forum and fairly new in learning unix and finding some difficulty in preparing a small shell script. I am trying to make script to sort all the files given by user as input (either the exact full name of the file or say the files matching the criteria like all files... (3 Replies)
Discussion started by: pankaj80
3 Replies

10. Shell Programming and Scripting

Sort help: How to sort collected 'file list' by date stamp :

Hi Experts, I have a filelist collected from another server , now want to sort the output using date/time stamp filed. - Filed 6, 7,8 are showing the date/time/stamp. Here is the input: #---------------------------------------------------------------------- -rw------- 1 root ... (3 Replies)
Discussion started by: rveri
3 Replies

LEARN ABOUT MINIX

installboot

installboot(1M)                                                                                                                    installboot(1M)

NAME

       installboot - install bootblocks in a disk partition

SYNOPSIS

       installboot bootblk raw-disk-device

       The boot(1M) program, ufsboot, is loaded from disk by the bootblock program which resides in the boot area of a disk partition.

       The  ufs  boot objects are platform-dependent, and reside in the /usr/platform/platform-name/lib/fs/ufs directory. The platform name can be
       found using the -i option of uname(1).

       The installboot utility is a SPARC only program. It is not supported on the  architecture.  users should use installgrub(1M) instead.

       bootblk         The name of the bootblock code.

       raw-disk-device The name of the disk device onto which the bootblock code is to be installed; it must be a character device which is  read-
                       able and writable. Naming conventions for a SCSI or IPI drive are c?t?d?s? and c?d?s? for an IDE drive.

       Example 1: Installing UFS Boot Block

       To install a ufs boot block on slice 0 of target 0 on controller 1 of the platform where the command is being run, use:

              example# installboot /usr/platform/`uname -i`/lib/fs/ufs/bootblk 
                   /dev/rdsk/c1t0d0s0

       /usr/platform/platform-name/lib/fs/ufs

           directory where ufs boot objects reside.

       /platform/platform-name/ufsboot

           second level program to boot from a disk or CD

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

       od(1), uname(1), boot(1M), init(1M), kadb(1M), kernel(1M), monitor(1M), reboot(1M), rpc.bootparamd(1M), init.d(4), attributes(5)

WARNINGS

       The installboot utility fails if the bootblk or openfirmware files do not exist or if the raw disk device is not a character device.

                                                                    11 Apr 2005                                                    installboot(1M)
All times are GMT -4. The time now is 03:47 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy