Debian Configuration :: Abysmal Write Speeds Over Network
Nov 11, 2010
Linux beginner, first project is a NAS based on Debian Lenny. Have SMB and AFP running. Hooked to a gigabit network. 8 disk RAID6 with mdadm. Need the NAS to back up our production company's video files.First attempt at back up was very, very slow on smb and afp. Used a Mac disk benchmark app, shows 100+MBps reads, but only .4MBps (as in 400kbps!) writes. Went through office LAN, and also tried just cabling the two machines (MacPro and Debian NAS) directly. Same results. Not sure what the write speeds are internally, as I don't know of any Linux/Debian disk testing software.
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Feb 12, 2016
I'm having a strange problem with data transfers between systems. I have a file server + my desktop. Both are running Debian 8.3. I have a samba share running on the file server and I mount the shares on my desktop on boot via /etc/fstab
When I copy a file using the nautilus from my home folder (on my HDD) on my desktop to the mounted network location, my transfers start out at gigabit speeds 80MB/s-90MB/s for a couple seconds and then drop down to about 8MB/s
But when I terminate the transfer and then use scp to transfer the same file, I get consistent gigabit speed throughout the transfer. I am not sure what is going on.
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Jul 21, 2011
I am getting extremely poor write speeds with my RAID. My setup is as follows: > HP Proliant Microserver > 4 2TB Samsung F4 drives > 60GB root drive > Ubuntu 10.10 64bit > mdadm 3.2.2. I have two of the above servers, connected via gigabit LAN. The read speeds I am happy with, but write speeds are running at about 20Mb/s at the very best, Especially when people with a similar setup on a machine like this are running at about 90MB/s write speeds. My array is as follows (mdadm --detail -D /dev/md0):
[code]...
I have also started the partitions at 64 instead of 63 in a bid to correctly align the partitions, although this doesn't seem to have made any difference.
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Sep 30, 2010
When I copy files to my External NTFS HDD using Ubuntu the write speeds are about 10-12 MB/sec, but when I copy files using Windows the write speeds are about 25-30 MB/sec.
Exact same files, tried all three ports on my netbook and even timed it to see if the speeds are by any chance miscalculated by either operating system and Ubuntu is definitely writing at half the speed.
So what could be the problem? When I had Windows on this Netbook I never got had a problem with write speeds so I don't think it is a hardware issue.
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Mar 3, 2010
I have a 4 drive RAID 5 array set up using mdadm. The system is stored on a seperate physical disk outside of the array. When reading from the array its fast but when writing to the array its extremely slow, down to 20MB/Sec compared to 125MB/Sec reading. It does a bit then pauses, then writes a bit more and then pauses again and so on.The test i did was to copy a 5GB file from the RAID to another spare non-raid disk on the system average speed 126MB/s. Copying it back on to the RAID (in another folder) the speed was 20MB/s.The other thing is very slow several KB/s write speed copying from eSATA drive to the RAID.
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Oct 11, 2010
I'm trying to back up my hard drive to a 2 TB WD external so that I can do a clean install of 10.10, however I'm getting tremendously slow write speeds. It hovers around 1.5 MB/s and steadily slows from there. It tells me it will take 150+ hours to transfer 400 GB of data.
I have a AMD quad core processor and 8 gigs of ddr3 ram... USB 2.0... I feel this should go much faster.
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Feb 13, 2010
I'm using openSUSE 11.2 (GNOME), When I go to yast and if I try configuring Fingerprint Reader or Windows domain membership I get the following error
Code:
Cannot write PAM settings
I want to understand whether its a bug or something related to configuration. When I
[code]...
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May 8, 2010
I am running Slackware 12.2.
I have checked the file like /etc/rc.d/rc.inet1.conf, and the command 'ip' or 'ifconfig', but still can not figure out how to write a script to switch between two network configurations easily.
Suppose that one configuration uses DHCP server to dynamically give the ip address, and uses a Default Gateway 1.1.1.1, a net mask 1.0.0.0, a DNS server 1.1.1.0;
and in another configuration the Ip address is fixed, and use a Default Gateway 2.2.2.2, a net mask 2.0.0.0, a DNS server 2.2.2.0;
Anyone would like to give me a hint on how to write one (or two separate) script(s) to switch between these two settings?
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Dec 13, 2010
About NFS.
Server:
Client(s):
Code:
I have followed Robbie Workmans' HowTo [url]
Reading and writing works absolutely fine with small files but large files are tediously slow in writing to the server. (rw,no_subtree_check) are options in exported directories.
What is your experience with NFS and how can I speed up large file/folder transfer(write) speeds?
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Jul 20, 2010
Having trouble with mounting drives, I have a usb pen drive that mounts no trouble now I've installed ntfs-3g and modified the fstab. however i can't write to it. I get the error as shown in the attached screen shot.
[Code]....
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Oct 11, 2015
When I plug in a usb flash drive, my Debian mount it, but when i am going to write, mkdir, rename file or paste a file permission denied.
The result of Code: Select alldev/sdc1 /media/usb0 auto rw,user,noauto 0 0
is Access denied
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Jan 5, 2011
I have a USB stick, formatted as FAT32 and I assumed that everybody would be able to read from and write to it. However, I find that if more than one person is logged on to the machine (logged on locally, with "Switch User"), then only one of the users is allowed to write to the stick, and the other users are only allowed to read from it. Is that normal?
Here's the scenario: person A logs into the machine, is in the middle of something but gets called away and the screensaver kicks in. The screen is now locked. Person B comes to the machine to quickly copy a file onto a USB stick, doesn't know person A's password so does a "Switch User" and logs in as themselves. They plug in the stick, can read from it, but can't write to the stick at all. Permission denied.
By doing a "ls -l /media", person B can see that the stick is mounted but is owned by personA with permissions drwxr-xr-x . So only person A can write to the stick. I haven't done extensive testing but it seems to be the person who logged on first who gets to own the stick. It's certainly repeatable as described above. And it's really annoying, because unless person B knows the root password, he can't write to the stick. As a real last resort person B could reboot the computer but he doesn't know whether person A has any important stuff open or not.
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Feb 13, 2011
Has someone tried to build and install wine in squeeze? I tried follow different manuals (e.g. [URL].. but always run into lots of warnings, missing packages and abortion of make. No wonder, squeeze seem to be pretty different from lenny.
I installed the binary wine, but that does not help in my case. There is a kind of bug in code for the mouse that can be fixed only by applying a patch. So anyone want to build wine and write down all the actions?
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May 1, 2011
jeff@optiplex:/media$ ls -l
total 124
lrwxrwxrwx 1 root root 6 Apr 7 14:46 cdrom -> cdrom0
drwxrwxr-x 2 root root 4096 Apr 7 14:46 cdrom0
[code]....
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Sep 14, 2010
I got a new machine with GA-p55A-ud3 mobo and a WDC WD10EARS 1T disk. When I tried to benchmark the disk IO, I was suprised by the low write speed:
[Children see throughput for 1 initial writers = 35962.63 KB/sec
Parent sees throughput for 1 initial writers = 35962.63 KB/sec
Min throughput per process = 35962.63 KB/sec
[code].....
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Mar 23, 2011
is there a way to give an application (controlaula) write access to a folder /var/lib/monitorprofe and files on that folder.
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Mar 3, 2011
I was playing with my debian server when something went totally wrong while i was editing something on my network interface,i removed those crap that i wrote and left the network interface configuration as it was
Like for example after re-editing my network interface,it was like :
As i did a network restart, i get this error saying :
There is already a pid file /var/run/dhclient.eth0.pid with pid 2802 killed old client process, removed PID file.
What is this error and how can i fix it,because every time im re booting my server i lost my network config.
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Feb 17, 2010
have the latest Vbox installed on CentOS 5.4, i have a XP home VM & Server 2003 VM set up. Im using the T1000 Emulated network driver and only getting 100-150mbps throughput when checked with QCheck. I tried the virtio-net (paravirtualized) drivers and only getting 50-90mbps using it, which i found odd. Is there any way i can increase the througput to my VMs? I seen some people on forums talking about getting 300-350mbps, but im no where close to that. When i check throughput to the host (CentOS) i get at least 800 mbps.
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Oct 24, 2010
I'm planning to use Debian as the OS for a firewall machine, which will sit between my internet connection and the rest of my computers. Now my network is all wired, no wireless whatsoever. I'm using the onboard the motherboards cat5 socket which seems to be using the VIA rhine driver and I'm also using a 3com 100MBps card.
I can list the machine spec if you want but it's nothing special, an old Athlon 64 rig with 1gb ram and an OEM motherboard, it all seems to work ok apart from the internet doesn't' seem to work. Lenny seems to detect both cards ok and I even used the net install CD and it managed to download everything using the 3com card.
The strange thing is when I'm in Lenny, I can't seem to connect. I can ping google, but when I try and view a webpage, the browser just sits there with a while screen... Could it be that using 2 network cards is confusing Debian? Right now I've only got the modem hooked up the the 3com card, and nothing connected to the onboard network card.
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Jun 30, 2011
In my desktop I recently installed one of these network cards. Web pages load pretty quickly, but the signal is only 2 out of 5 bars. On my notebook, I get 4/5 bars from the same location away from my wireless router. I have a 25/25 Verizon FiOS plan and can usually obtain around 30Mbps through Speedtest on my wired machines and notebook. But for some reason, my desktop barely goes over 4Mbps.
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Nov 16, 2010
Trying to watch movies between my systems and I'm getting upload speeds of 6.5 kb/s from my system to the one connected to the tv. I'm running Ubuntu on both machines, tried with VLC and XBMC. Both are running wirelessly but I know that this issue is new, I used to get at least a meg a second on LAN.
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Jun 8, 2011
during an "apt-get install" the filesystem of a virtual machine filled up and so it failed. I have now increased the file-system size but running the same "apt-get install" again results in this error: "E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem." However when I try to run 'sudo dpkg --configure -a' I get this error: "dpkg: failed to write status database record about 'libxmuu1' to '/var/lob/dpkg/status': No space left on device" How can I recover from this situation?
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Feb 14, 2011
I have a new install of Debian Squeeze from debian-6.0.0-amd64-kde-CD-1.iso but I'm experiencing problems with the wireless internet applet in the taskbar.When the computer boots, it doesn't connect automatically eventhough I have it set as such. I have to fiddle with it until I get the request from KDE Wallet Manager to insert the password to complete the connection. I didn't have this behavior in Kubuntu.
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Jan 18, 2010
I'm opening up Network and it asks me for the root password. I enter it and the program comes up. I enter a static address for both eth0 and eth1.
I don't see a Save button. Eventually I get out of the configuration tool. The next time I run the tool, my static addresses have not been saved.
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Sep 14, 2010
I've illustrated it on this picture, and hope to get the help i need to set it up... [URL]Thow it has to be furture secured, in that meaning it has to be abel to attach a eth2 on the main server, so i have 3 NIC's.Also, i want to have fully controll over ports, IP/MAC's and data overview (Such as a view of the files beeing downloadet/uploadet).
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Apr 9, 2011
I installed testing on my netbook with cd1. and too my suprise it didn't even include something as important as network manager. all i want to do is connect to my wired internet, install network manager, then install my driver for card. if i can just get wired working i will be homefree. the directions for installing my wire3less driver look super simple.
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May 21, 2011
I have a server and I have a few computers connected to it via a Airport Extreme. Using network cable. So when Im uploading,(ftp) IE using a lot of the network "space" the other computers on the network gets kicked out. So what is going on? My Airport Extreme is doing fine, but my other clients just get kicked out. If I pause the upload, everything is okay again. The whole network is 1 gigabit, clients, everything.
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May 25, 2011
I have a computer home that I use a web server and I had Lenny in it for about a year and didn't experience any problems. Recently I needed to update to Squeeze just to be able and use part of my server for a game(which I couldn't compile on Lenny). I renamed every "lenny" word in the /etc/apt/sources.list with "squeeze" and ran dist-upgrade. Everything seemed fine(minor some "link not found" warnings). I also had some minor problems with the mysql configuration after the update but I managed to fix them all. Then I noticed that after some hours(not sure how many) I can suddenly not reach my computer via ssh. Neither can I visit my website(even from the local network). The computer doesn't appear either in the router's "attached devices" list. My other computers have no problems so it can't be a router issue.Pinging from the server to the outside world doesn't work. I tryied "sudo /etc/init.d/networking restart" and that didn't do anything. The only way to fix the problem is by rebooting but then again after some hours the problem is still there. Do you guys have any idea what the problem can be?
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Aug 4, 2015
I'm trying to install using windows 7 on a 2010 macbook pro. Firstly the network configuration won't work and secondly the cd rom can't be detected. I've rewritten the usb drive several times with no joy.
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Aug 11, 2011
Some problems keep bothering me and dont let me use my debian sqeeze with joy.Im in network with no DHCP on. When installing i didnt configure my eth network card.After each restart i need to configure manually my eth because it loses it.
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