Networking :: Delay In Reading The Huge Proc Net Tcp6 File?

Dec 7, 2010

I am trying to read the /proc/net/tcp6 file of a huge server (chat server) for monitoring the tcp6 connection states.

This tcp6 file has more than 26000 lines. For monitoring the server connections, my monitoring tool has to read the /proc/net/tcp6 file quickly in regular interval. Presently it takes minimum 6-7 seconds for reading the whole file.

My tool can able to read the normal file (26,000 lines) less than 1 second, but it is not possible to read the same size of proc file.

I have 2 questions:

1) Why proc file takes more read time than normal file?

2) Is there any way to read the /proc/net/tcp6 file more quickly?

View 1 Replies


ADVERTISEMENT

Programming :: Read Time Of /proc/net/tcp6 File

Dec 8, 2010

I am trying to read the /proc/net/tcp6 file of a huge server (chat server) for monitoring the tcp6 connection states.

My server's tcp6 file has more than 26000 lines. For monitoring the server connections, my monitoring tool has to read the /proc/net/tcp6 file quickly in a regular interval (5 secs) and process. Presently it takes minimum 6-7 seconds for reading the whole file.

My tool can able to read the normal file (26,000 lines) less than 1 second, but it is not possible to read the same size of proc file.

I have 2 questions:

1) Why proc file takes more read time than normal file?

2) Is there any way to read the /proc/net/tcp6 file more quickly?

View 2 Replies View Related

Software :: Delay When Reading From An USB-A-port?

Jun 29, 2010

Working on a project based on embedded linux. The system is based on an Atmel ARM9 processor.

On one of the ports, an USB-A, we are constantly talking with several pieces external equipment (hereafter called slaves) at the speed of 4800 baud.

The communication is designed so that one messages is sent to a certain slave. The answer is expected to arrive directly. If no answer is received within 2 seconds, the sent message is sent in a resend buffer, and will be sent next cycle.

My problem is now that sometimes, the answer isn't received in 2 seconds. But when the message to the next slave is sent, the answer from the previous slave is received.

That is at least how it looked like from my software point of view.

But, then I used a serial sniffer on the USB port, and found out that the answer actually did arrive in time. Thus the delay must be somewhere between the USB port and my software. Linux in other words?

My software uses standard functions read() and write() for the communication.

View 1 Replies View Related

Networking :: Statistic About Interfaces From /proc/net/dev - File Is Reset When Get Reach More Than 4G Byte

Jun 27, 2010

I have to get soem statistic about interfaces from /proc/net/dev. but statistic on this file is reset when get reach more than 4G byte.I think linux has limitation on this case.

View 1 Replies View Related

Fedora :: Install Firestarter: Insufficient Privileges + Visudo Error + Error Reading /proc/ne

Dec 1, 2009

i try today to install Firestarter , unfortunately i got some problems regarding of the following messages:

1- insufficient privileges :
2- how can i change and save the file /etc/sbin/firestarter with visudo cammand
3-i got this message when i try to run it through terminal Error reading /proc/net/ip_conntrack: No such file or directory

View 5 Replies View Related

General :: Why Is Reading A FILE Faster Than Reading A VARIABLE?

May 4, 2011

I don't understand the results of a simple performance test I ran using two basic scripts (running on a high end server):

perfVar.zsh :

#!/bin/zsh -f
MYVAR=`cat $1`
for i in {1..10}

[code]...

Performance test result:

> time ./perfVar.zsh BigTextFile > /dev/null
./perfVar.zsh FE > /dev/null 6.86s user 0.32s system 100% cpu 7.177 total
> time ./perfCat.zsh BigTextFile > /dev/null
./perfCat.zsh FE > /dev/null 0.01s user 0.10s system 91% cpu 0.118 total

I would have thought that accessing a VARIABLE was way faster than reading a FILE on the file system... Why this result ?Is there a way to optimize the perfCat.zsh script by reducing the number of accesses to the file system ?

View 3 Replies View Related

Networking :: Pxe Booting Is Not Reading Kickstart File?

Jun 27, 2010

i am trying to boot linux pc from network booting.. so using pxe,tftp,dhcp(1).i configured my /etc/dhcpd.conf file as...

ddns-update-style none;
ignore client-updates;
allow booting;

[code]....

View 5 Replies View Related

Ubuntu Networking :: Broadcom On 2.6.34 - Reinstall Error Code: Reading Package Lists ... Done Building Dependency Tree Reading State Information

May 20, 2010

i installed kernel 2.6.34 to fix my lid closing issue, and that went great. but now when i go to reinstall my broadcom i get this error. Code: Reading package lists... Done Building dependency tree Reading state information... Done bcmwl-kernel-source is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded. 1 not fully installed or removed. After this operation, 0B of additional disk space will be used. Setting up bcmwl-kernel-source (5.60.48.36+bdcom-0ubuntu3) ... Removing old bcmwl-5.60.48.36+bdcom DKMS files...

[Code].....

View 9 Replies View Related

Fedora Installation :: An Error Occurred Mounting Device Proc As /proc: Mount Failed

Jul 6, 2010

I've got the F13 LiveCD that I was able to boot and use using the "nomodeset" boot option. From the desktop I'm trying to perform an Install to Hard Drive. I've read the Install from LiveCD post regarding the creation of a /boot partition and a / root partition. I've tried creating them without the LVM group and with. But every time I appempt to install I get...

An error occurred mounting device proc as /proc: mount failed: (9, None). This is a fatal error and the install cannot continue.

Hardware is a Sager 8887 (P4, 3.06HT, 60GB HDD, Radeon 9000 graphics adapter)

View 7 Replies View Related

Ubuntu Installation :: Post-GRUB 2 Delay - Troubleshoot This And Determine What Is Causing The Delay

May 11, 2011

After GRUB 2 comes up (I'm running Ubuntu 10.10) and I choose the OS to boot, there is about a 5 second delay where nothing appears to happen after I make the selection -- no disk activity. It happens consistently every time I boot. Again, this is after I choose the OS to boot, so it shouldn't have anything to do with the standard delay to allow me to choose the appropriate OS.Is there a good way to troubleshoot this and determine what is causing the delay?

View 4 Replies View Related

Programming :: HUGE Files - Compare A List Of Patterns From One File And Grep Them Against Another File And Print Out Only The Unique Patterns?

Aug 13, 2010

I am trying to compare a list of patterns from one file and grep them against another file and print out only the unique patterns. Unfortunately these files are so large that they have yet to run to completion. Here's the command that I used:

Code: grep -L -f file_one.txt file_two.txt > output.output Here's some example data:

Code:
>FQ4HLCS01BMR4N
>FQ4HLCS01BZNV6
>FQ4HLCS01B40PB
>FQ4HLCS01BT43K
>FQ4HLCS01CB736
>FQ4HLCS01BU3UM
>FQ4HLCS01BBIFQ

how to increase efficiency or use another command?

View 14 Replies View Related

Ubuntu :: Transfer Huge Music File To XP?

Feb 13, 2010

Seldom use windows, but need to transfer huge music file from Linux to XP

View 3 Replies View Related

Ubuntu :: How To Compress Huge File With JPEGs

Feb 23, 2011

I want a huge file of .jpeg files. How can I can compress these files to save my space? Is there any s/w for this??

View 2 Replies View Related

Debian :: Edit The File Shmmax In Proc/sys/kernel?

Jun 24, 2010

I am trying to edit the file shmmax in proc/sys/kernel/. I want to increase the value. I am using vim to edit it. But when I try to write and close the file I get the following error: "shmmax" E667: Fsync failed Press ENTER or type command to continue

View 3 Replies View Related

Ubuntu :: Change Permissions On A File In /proc/sys/fs/inotify?

Sep 16, 2010

Trying to change permissions on a file in /proc/sys/fs/inotify. The command syntax are:

Code:
sudo chmod u+w max_user_watches
and the result is:

Code:
chmod: changing permissions of `max_user_watches': Operation not permitted Also tried to change it when logged in as root, same results. Parent directory permissions are dr-xr-xr-x, and are the same up the chain. Tried to change the directory permissions to u+w, that didn't work either. FWIW, /proc is part of the / partition, and it has ~600MB free space.

View 9 Replies View Related

Red Hat :: Generate Default_smp_affinity File In /proc/irq Virtual Directory ?

Mar 16, 2010

I am using RedHat MRG on a standalone intel PC that has 8 cpus. It has 2 Quad cores. I am trying to force some specific persistent tuning on it so that the OS and IRQs are all on one CPU socket and then I can run my Application on the other CPU socket (4 CPUs) using the taskset command.

I have been reading up on this mainly at [url] and having some success. But, I have one IRQ that is not active until my application runs that I want to force it to be on CPU 4.

And so I believe I can do this by setting /proc/irq/default_smp_affinity to 10. But, I do not have such a file on my system. How can I create this file at boot time properly?

View 1 Replies View Related

Red Hat :: /proc/devices: Fopen Failed: No Such File Or Directory?

Jan 14, 2010

I am booting RH 5.4 over network (PXE) with custom initrd.img. I managed to get NFS working and switch root and do normal RH /sbin/init, but as RH boots it complains about /proc/devices missing:/proc/devices: fopen failed: No such file or directoryThe file is indeed missing, even though I'm doing "modprobe dm_mod" before. But still /proc/devices is not created. What am I doing wrong?init script for that initrd.img:

Code:
#!/bin/bash
export LD_LIBRARY_PATH=/lib:/usr/lib:/usr/kerberos/lib

[code]....

View 2 Replies View Related

General :: RSYNC Error .tar.gz 14gb File / Transfer Huge 14 Gb File Over Network,vpn,wan Transfer?

Mar 10, 2010

i am trying to transfer a file from my live linux machine to remote linux machine it is a mail server and single .tar.gz file include all data. but during transfer it stop working. how can i work and trouble shooot the matter. is there any better way then this to transfer huge 14 gb file over network,vpn,wan transfer. the speed is 1mbps,rest of the file it copy it.

rsync -avz --stats bkup_1.tar.gz root@10.1.1.22:/var/opt/bkup

[root@sa1 logs_os_backup]# less remote.log
Wed Mar 10 09:12:01 AST 2010
building file list ... done
bkup_1.tar.gz
deflate on token returned 0 (87164 bytes left)
rsync error: error in rsync protocol data stream (code 12) at token.c(274)
building file list ... done
code....

View 1 Replies View Related

General :: Unzipping A Huge File Stalls The Server?

Jul 8, 2011

I want to extract a huge .tar.gz file but when I do extract it stalls the server. The server is write heavy and extracting seems to choke the disk. Is there a nice way to extract without stopping the world? I've tried the 'nice' and 'cpulimit' command but they don't seem to do the trick.

View 2 Replies View Related

Ubuntu :: Copying File - Error Reading From File Input/output

Jun 29, 2010

I have a 7.2 GB file (VMWare virtual machine file) that I am trying to copy from its original location to the another folder OR to external hard drive...each time I try to do this, I always get the following error after the copying process reach 'exactly' 1.4 GB

Error reading from file input/output error

And I have to either Cancel or Skip

I've tried to split the files to smaller pieces but the idea didn't work as I still get the same error whenever I try to compress/ split or do any operation with this file. how I can copy this file?

View 2 Replies View Related

General :: Using The /proc File Systems To Increase Performance And Functionality?

Jul 5, 2010

I'm interesting in knowing what processes could be altered to improve performance and functionality on my system. And which process may be the best one to alter

View 2 Replies View Related

General :: Grab A Random Section In The Middle Of A Huge File?

Apr 23, 2011

I have a huge log file of around 3.5 GB and would like to sample random sections in the middle of say 10 MB for the purpose of debugging what my application is doing.

I could use head or tail commands to get the beginning or end of the file, how can I grab an arbitrary portion from the middle of the file? I guess I could do something like head -n 1.75GB | tail -n 10MB but that seems clumsy and I'd need to determine line numbers for the midpoint of the file to get 1.75GB and 10MB line counts.

View 2 Replies View Related

Ubuntu :: Huge UUID File In Gvfs-metadata - 8.4 Gigs

Feb 14, 2010

I have a UUID file that has grown to 8.4 gigs... and I don't know what to do. Its sucking up all the free space in the partition. I guess I will have to delete the file but I don't know how to do it properly.I suspect this is a backup of all the data I have been moving around between drives recently.

View 2 Replies View Related

General :: Split Huge File Into Small Parts And Compress Them?

May 30, 2011

I've a file with a size of 6GB. I would like to compress this file and split them into smaller files. I was also thinking in use bzip2 to compress it, because if offers a good compression rate. How can I split this file into small ones to compress it?

View 5 Replies View Related

General :: Ifconfig Indicates Different Interrupt Number For Eth0 Than Proc Aqd Sys File System

Sep 22, 2011

On my system (OpenSUSE 11.4 - kernel 2.6.37) ifconfig indicates different interrupt number for eth0 than proc aqd sys file system.

ifconfig indicates 17:

proc fs indicates 43:

sys fs indicates 43:

Relevant part of lspci -vv output for irq 17 (this belongs to wlan0 and not to eth0):

Relevant part of lspci -vv output for irq 43:

View 1 Replies View Related

General :: Java Process Without Memory Detail In Proc File System?

May 13, 2010

To get the kernel messages of new java process, i refer the details from /proc/<java pid>/stat and /proc/<java pid>/statm files. For some java processes, I didn't find any details in the /proc/<java pid>/statm file. It has only 7 number of 0s. But /proc/<java pid>/stat file has the details. And also this kind of process will have the life time of nearly 1 minute.

Kernel version using: Linux-2.6.18-8.1.8.el5 Is there any possibility of java process without the memory details in the /proc/<java pid>/statm file? If it is possible, how to know the memory related details of that processes?

View 1 Replies View Related

CentOS 5 :: No Support For /proc/modules - No Such File Or Directory /sbin/modprobe -l?

May 19, 2009

i'm using Centos 5.3 (2.6.27.10-grsec-xxxx-grs-ipv4-64 x86_64 kernel) and i got a problem with installing apf/configuring iptables. It seems that my kernel doesn't support Loadeble Kernel Modules. I'm receiving following message when catting /proc/modules: Quote: cat: /proc/modules: No such file or directory /sbin/modprobe -l FATAL: Could not load /lib/modules/2.6.27.10-grsec-xxxx-grs-ipv4-64/modules.dep: No such file or directory

View 4 Replies View Related

Ubuntu Multimedia :: WinFF Converts But With Huge File Size Output

Jun 1, 2010

I haven't used WinFF before yesterday. Looks simple so I tried to convert an AVI file of 600MB to DV and ended up with an 8GB conversion.For device preset I used Raw DV for Pal Fullscreen as I'm in Australia.Does WinFF always produce such large files?

View 1 Replies View Related

Debian :: E667: Fsync Failed - Edit The File Shmmax In Proc/sys/kernel/?

Jun 24, 2010

I am trying to edit the file shmmax in proc/sys/kernel/. I want to increase the value. I am using vim to edit it. But when I try to write and close the file I get the following error:
Quote:

"shmmax" E667: Fsync failed
Press ENTER or type command to continue

I have read that this can be cause by a full disk. I checked with df and have plenty of space available.

View 3 Replies View Related

Ubuntu Networking :: Permissions For Proc Files?

Jul 30, 2010

i want to change permissions for /proc/sys/net/ipv4/ip_forward and permission denied.when i want to delete it , operation not permitted.i know it is dynamically created file . but i want to chenge its permittion to read-only or delete it

View 2 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved