Sponsored Content
Special Forums Hardware Filesystems, Disks and Memory A tcpdump-like tool for disk I/O? Post 302380278 by vsmi on Monday 14th of December 2009 05:55:26 PM
Old 12-14-2009
Corona688, thanks for your input. But I think you agree with me that that's not exaclty it. With strace I cannot see how exactly read/write API calls are mapped into block devide requests, next - a very important one - I cannot see how efficiently I utilize FS. For example on some filesystems I have to allocate file in large chunks and then fseek, on others I have to append, so on... - all these choises become obvious once I can see what's going on under the hood...

PS
I think once I found a tool that did exactly what I need by installing a driver under /proc but now I can't find it anymore...
 

10 More Discussions You Might Find Interesting

1. Programming

How To Use tcpdump

I have two net-card. one is 172.16.24.99(ENG) ,another is 172.16.25.99(ENG-B). Both masks is 255.255.255.0. I will monitor data on the tcp port 8055 in ENG, How do I set option of tcpdump command (2 Replies)
Discussion started by: chenhao_no1
2 Replies

2. UNIX for Dummies Questions & Answers

tcpdump

does anybody know what the -d -dd and -ddd options are used for ? thanks (2 Replies)
Discussion started by: ant04
2 Replies

3. Cybersecurity

i would like to know about tcpdump

i would like to know about tcpdump i would like to use tcpdump to get information about these - Date - time - source hostname - source mac address - source ip address - destination ip address - see outbound only then i use command like this tcpdump -i le0 -n -q -tttt -e src net... (0 Replies)
Discussion started by: chamnanpol
0 Replies

4. IP Networking

i would like to know about tcpdump

i would like to know about tcpdump i would like to use tcpdump to get information about these - Date - time - source hostname - source mac address - source ip address - destination ip address - see outbound only then i use command like this tcpdump -i le0 -n -q -tttt -e src net... (2 Replies)
Discussion started by: chamnanpol
2 Replies

5. AIX

AIX 5.2 5.3 disk performance exerciser tool

I'm search for a disk exerciser / load tool like iometer, iozone, diskx for IBM AIX 5.2 and 5.3 Because of a very bad disk performance on several AIX systems, I need to have a tool which is able to generate a disk load on my local and SAN disks. Does somebody knows a kind of tool which is... (5 Replies)
Discussion started by: funsje
5 Replies

6. IP Networking

tcpdump -w: how to reduce disk space ?

Hello ! I am using tcpdump -w /tr.cap -p -n -s 0 "udp" to trace my network trafic. (analysing later) I want to reduce the size of the trace files. Firtst i can use the great -C option but old files are not deleted... Second I don't want trace RTP packet but i can't find how to use... (1 Reply)
Discussion started by: Calimero90
1 Replies

7. Solaris

iostat as a tool for generating disk IO

Hi All Currently i had a server directly connect to the EMC box. The EMC storage is a FC Direct Attached Storage to the server without going through SAN switches And i had download the Daily data file in /var/adm/sa/sardd But i not sure which one in /var/adm/sa/sardd is the correct... (14 Replies)
Discussion started by: SmartAntz
14 Replies

8. Programming

Tool to simulate non-sequential disk I/O (simulate db file sequential read) in C POSIX

Writing a Tool to simulate non-sequential disk I/O (simulate db file sequential read) in C POSIX I have over the years come across the same issue a couple of times, and it normally is that the read speed on SAN is absolutely atrocious when doing non-sequential I/O to the disks. Problem being of... (7 Replies)
Discussion started by: vrghost
7 Replies

9. Debian

Tcpdump Help !

Hi. Need Help with TcpDump Trying to sniff associatio-request with tcpdump but when i run this tcpdump -i eth0 wlan subtype assoc-req i get this error can anyone help me with this error ? Thanks alot !!:) (1 Reply)
Discussion started by: SoulZB
1 Replies

10. IP Networking

TCPdump

I've recently started learning to use TCPdump, and I find it pretty interesting. There's one thing I don't understand. When I tell it to capture packets on, say, the WiFi interface en1, it often captures packets sent or received by other hosts on the network. How can it do this? My... (3 Replies)
Discussion started by: Ultrix
3 Replies
PYDF(1) 						      General Commands Manual							   PYDF(1)

NAME
pydf - report colourised filesystem disk space usage SYNOPSIS
pydf [options] [file] DESCRIPTION
pydf is a python script that displays the amount of disk space available on the mounted filesystems, using different colours for different types of filesystems. Output format is completely customizable. If an optional file argument is given, pydf displays just information about filesystem containing the file(s), otherwise it displays information about all mounted filesystems. OPTIONS
--help Show summary of options. -v, --version Show version of program. -a, --all include filesystems having 0 blocks -h, --human-readable print sizes in human readable format (e.g., 133K 2341M 2448G) -H, --si likewise, but use powers of 1000 not 1024 --block-size=SIZE use SIZE-byte blocks -k, --kilobytes like --block-size=1024 -i, --inodes show information about inodes instead of blocks -l, --local limit listing to local filesystems -m, --megabytes like --block-size=1048576 -g, --gigabytes like --block-size=1073741824 --blocks use filesystem native block size --bw do not use colours --mounts=FILE file to get mount information from. On normal linux system, only /etc/mtab or /proc/mounts make sense. Use /proc/mounts when /etc/mtab is corrupted or inaccessible (the output looks a bit weird in this case though) -B, --show-binds Show also mount --bind mounted filesystems. BUGS
When running with python3, mountpoints with out-of-locale non ASCII names will not be displayed (due to inability of os.statvfs to use bytes instead of strings). FILES
/etc/pydfrc main configuration file ~/.pydfrc per-user configuration file SEE ALSO
df(1) AUTHOR
Radovan Garabik <garabik@kassiopeia.juls.savba.sk> PYDF(1)
All times are GMT -4. The time now is 11:01 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy