Fedora Networking :: Slower Data Transfer Rate In KDE V GDM?
Nov 25, 2010
I have a FC13 box that has both Gnome and KDE sessions installed.
I have noticed on the KDE session that data transfer rates are slower than when I use Gnome.
In Gnome, I can transfer files between my FC13 machine and my Ubuntu 10.04 pc at a rate of 6.5 MB/s (52 Mb/s if my maths is correct), but in KDE the rate is only 3.5 MB/s (28 Mb/s).
"ethtool eth0" shows my NIC speed as 100 Mb/s. Obviously I am not hitting anywhere near that speed in either session, (a separate article may be happen in the future to address that), but I am curious as to why KDE is that much slower for file transfer.
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Apr 25, 2010
anyone know why this would happen? I ran the following dd command:
Code:
dd if=/dev/sdb1 of=hard/old_dell_desk_part1.img
a USB external drive was mounted to the 'hard' directory with the standard mount command. it is a ntfs-3g filesystem. it is a mechanical drive.
same behavior with solid state memory (flash, and solid state hard drives)
3693492+0 records in
3693492+0 records out
1891067904 bytes (1.9 GB) copied, 274.562 s, 6.9 MB/s
[Code].....
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Jul 4, 2010
My friend bought an old hard drive. He noticed something with the hard drive that it was just replaced with a SATA socket. So meaning, the SATA socket was soldered to the PATA hard disk to replace the PATA socket to SATA socket to make it a SATA.
Now the question is:
1. Does the Transfer Rate of the harddisk (that has been replaced from PATA socket to SATA socket) would be SATA transfer rate? OR would still be PATA transfer rate?
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Mar 27, 2010
I have a LaCie NAS which is mounted on my main linux machine over a wifi LAN using the cifs file system. I would stupidly expect the transfer rate between my hard drive and the NAS to be limited by the Wifi speed (54 Mbps) but when I transfer files, the speed tops at 1.9 Mb/s which is roughly 15.2 Mbps. The most puzzling thing is that when I do multiple simultaneous transfers, I reach approximately 3MB/s in total but none of the individual transfers goes beyond 1.8. Does anyone have an idea about what is keeping the transfer rate so low?
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Apr 1, 2010
We have a Linux box which acts a a file server. Currently, files and directories are exported using NFS.At the moment, we are a bit concern on its data transfer performance. FYI, we are using a embedded Gigabit Ethernet port on the file server. We ran a few simple write tests between NFS client (also utilizes GigE port) and the NFS server. In these tests, both NFS server and client are both connected directly to each other with a Cat5E cable. Unfortunately, the write/transfer speed results are not as per our expectation. It scores roughly about 11-12MByte/s, where as theoretically Gigabit Ethernet transfer rate is able to reach up to approximately 120MByte/s.I wouldn't expect to reach the theoretical max transfer rate (it would be great if we can , but I would appreciate if you guys can share with us in terms of the following :
1) What's the practical max data transfer rate which you guys managed to observe in a normal Gigabit based connection? What about jumbo frames configuration?
2) Is there any additional tuning/configuration we need to do within the OS to reach those practical max data transfer rate figure?
3) Does PCI-e / system bus plays a role in achieving this speed? For example, we are using the embedded GigE port and we heard some people says embedded ports are actually sharing the system bus and resources with other devices, which might adds into performance issue. Correct me if I'm wrong.
4) Does converting to Cat6 cabling will guarantee an increase in the data transfer performance?
5) In the future (once we are clear on how much single GigE transfer rate we can go) , we are looking into doing bonding since that the NFS server's shared directory/volume read-write speed is way much higher (i.e 400-600MByte/s). Will bonding allow us to achieve higher NFS read/write speed? What are the bonding modes best used for this purposes? Appreciate if anybody who has experience in doing bonding for NFS can share their experience.
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Mar 2, 2011
I am struggling trying to understand the reason for a fairly slow data transfer rate between two machines. ( tried point to point and also via a 1 gb switch )
One is nfs/http/ftp server ( with raid1 and lvm on top ), the other one my desktop pc. Both OS with default options, no changes to kernel in proc or other sort of thing.
Hardware is full recognized and perfectly working: The server has 4gb ram, Intel Core 2 Duo CPUE6850 @ 3.00GHz, 1000Mb/s NIC card and Lucid 10.04 64 bit, 250Giga Hard disk. The client has 3gb ram, Intel Core 2 CPU 6320 @ 1.86GHz, 1000Mb/s NIC card and Ubuntu Maverick 32bit , 150Gb Hard disk.
Raw data is good:
gettons@gettons-desktop:~$ iperf -c MYSERVER
------------------------------------------------------------
Client connecting to MYSERVER, TCP port 5001
[Code].....
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Jan 28, 2011
I have not tried this, and I am only wondering about the result.Let's say that I have a PC/Laptop with two network devices: an ethernet and a wireless. Can I connect both of the to the same network (if this network allows both connection) to increase the transfer rate between the PC/Laptop and the server???
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Sep 26, 2010
I have 2 10.04 machines connected through a switch, both with gigabit on board ethernet. Both machines show 1000 Mb/s connections.When I transfer large files (gig plus up to multi-gig) the maximum I get according to ftp 11472 kB/s.I did rough computer school math in my head and that seems low but I'll admit I know very little about network transfer rates.My question is what transfer rates should I expect to get between the 2?
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Aug 21, 2010
I am newbie to linux, I am dealing with Fedora core 13. I have already succeedded in building an ad hoc network and a WLAN network. My next step is to get some networking statistics such delay, throughput, etc. So, I need traffic to flow through the network for both multimedia traffic and bulk data traffic. How to send files between nodes on the network (I found commands ftp, rcp but do not know whether they are the correct choice for this). ID their any application to perform this?
Also, I want to perform some video streaming between two nodes to study the behavior of real time data transfer. Is thier any application to perform this?
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Jan 11, 2010
I just bought a HP 3085dx laptop with an intel 5100 agn wireless card.
The problem: copying a big file over the wireless to a gigabit hardwired to the router computer only gives an average 3.5MB/Second transfer rate. If I do the same copy from my wireless-n macbook pro to the same computer. I get a transfer rate of about 11MB/sec. Why the big difference? I noticed the HP always connects to the 2.4 GHZ band instead of the 5GHZ bands...
On the HPL
[jerry@bigbox ~]$ ifconfig wlan0
wlan0 Link encap:Ethernet HWaddr 00:246:36:AC4
inet addr:192.168.1.75 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::224:d6ff:fe36:acc4/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:639243 errors:0 dropped:0 overruns:0 frame:0
TX packets:1293049 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:53832795 (51.3 MiB) TX bytes:1888619922 (1.7 GiB)
[jerry@bigbox ~]$ iwconfig wlan0
wlan0 IEEE 802.11abgn ESSID:"<censored>"
Mode: Managed Frequency:2.412 GHz
Access Point: 00:24:36:A7:27:A3
Bit Rate=0 kb/s Tx-Power=15 dBm
Retry long limit: 7 RTS thr: off Fragment thr:off
Power Management: off
Link Quality=70/70 Signal level=-8 dBm Noise level=-87 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
I am not getting any errors. I don't know why the bit rate is not known. My airport extreme base station typically reports that the 'rate' for the hp is typically 250~300MBi and about the same for the MacBook Pro. The hp is about 6 inchs away from the base station. Is there anyway to get the rascal to go mo'faster? Is there anyway to get the rascal to use the 5GHZ band.
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Aug 8, 2010
I'm sure this is simple but I haven't a clue how to do it other than System Monitor, which only displays for the total uptime.
I want to see what my total network data use is in Bytes (GB, MB, or KB) downloaded/uploaded for the month or any given date range.
Rationale is I want to use wireless tethering from my phone to replace my broadband connection at home. At the moment my phone contract gives me unlimited data access, however if I were to sign a new contract today this would drop to 2 GB a month with hefty overage charges.
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Sep 28, 2010
I first noticed the disparity when I was moving some ISO files from Maverick to another partition. It was around 12-15 mb/s, where later I found Lucid to be around 30-50 mb/s.I then dropped into a VT and tried both from there, and discovered Maverick still much slower.thinking it may be the newer Nautilus, I re-booted and telinit 3, first using Maverick then Lucid.Lucid moved several gigabytes of data from one partition to another. It finished in "0m5.290s" where Maverick using the same computer and exact same data, moving to the exact same location "0m8.870s", Maverick being almost 60% slower.Not sure now where to look. Perhaps a newer library, or extra process being in use. Using telinit 3, I never loaded anything else. Is there any tools that can trace the moves.
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Jun 12, 2010
when I try to transfer a folder from the desktop machine to laptop I get the following:
Code:
morad@linux-m9c6:~> cd /data/
morad@linux-m9c6:/data> scp -r nobani@192.168.1.3:/data/geant .
Password:
[Code]....
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Jul 26, 2011
Recently I had a situation where I had to transfer data from a PC to a Mac. Usually we simply convert the data as necessary, ie. bookmarks, contacts, etc. move the info to a dropbox account and use Windows networking to access the dropbox from a Mac. Well, there was a network issue and it was suggested that I boot to Ubuntu and do this. We do have Ubuntu on a flash drive but I was lost from there. Can anyone point me in the direction of documentation or assist me in understanding how this would be accomplished? I have a Mac, PC and Linux box at home so hopefully I have all the necessary tools to test this out.
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Aug 19, 2009
I am quite newbie with Linux networking and I want to know if there exist a log in Linux where errors during transfers are stored. I mean, when I'm transferring data between two hosts is there any way to log somewhere (where?) the errors or warning during the transfer? That is, connection failures, TCP or UDP errors, etc.? Is there any "log level" to select the errors to be displayed in the log not to work with a huge log file?
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May 11, 2011
Iam using public ftp server,the server file transfer rate is very very slow & the server is also very slow,In which way can i check the server to make it fast,can any one give sugession on this.
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Feb 27, 2010
i am using NCTUns simulator and having problem while receiving message from an OBU. sending a message works properly but recving creates problem and fails. i am using exactly the same function as used by the developers in the demos but still no luck. i copy the code attch the screen shots to have a look
sendto() and recvfrom() are used for message transfer. they both return >-1 if they are executed successfully. please have a look in the screenshots. agentClientReportStatus is the built in packet format which im using here whose fields i filled manually are in the code below.
agentClientReportStatus *message,*mssg;
int remainTime,n,n2,n3,i,sendingaddress,value;
sockaddr_in cli_addr;
timeval now;
[Code].....
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Feb 12, 2011
I am using Workstation machine linux 64bit, having two NICs I assigned diffrent IPs for two MAC IDs. Through router I connected both cards to a sing port.
My doubt is will it improve the bandwidth of path? or I need connect different socket?
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Mar 23, 2011
Sd card transfer rate is 133mb/s and ide transfer rate is same 133mb/s. Using no extra wire and direct connection, why is that sd card is much gradual than ide?
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Jul 17, 2010
I bought a laptop today (Compaq Presario cq62) and loaded Ubuntu 10.04 on it. Everything has been running great, but the Wifi has been acting up. It connects to my router for a few seconds to a minute, and then stops all data transfer (although it still shows that I am connected to the internet). My other computers running Mac work fine. I took my laptop to another place with wifi, and it did the same thing.
The data transfer seems to stop when there is a lot going on. Whenever I try downloading new software, it gets to exactly 5% then stops. If I disconnect the wifi, and reconnect it works again for another minute. I may need to be walked through any terminal codes.
On that note, where would be a great place to read up on using Ubuntu (online book?)
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Mar 14, 2011
I am trying to transfer a lot of data from my laptop to my computer. Both are running Ubuntu 10.04 and both have Samba installed, and folders are setup for sharing. The laptop has a 56Mbps Wireless G built in module, and the computer has a Airlink AWLL6075 Wireless N USB Adapter 300Mbps. (I got the USB adapter working with the internet, since there was an issue with it just working out the box)
I have a wireless network, since wired is out of the question. The router is a Belkin Play N600 HD if that makes any difference. When i try to transfer the files across the speed of the transfer maxes out at about 785 Kbps (My Internet speed is 7Mbps=875 KB/s). It seems that the file is being sent to the router and then the internet and back to the router and then my computer.
I figure that bottleneck is my Laptop at 56Mbps, but that still gives a theoretical max of 7MB/s even at a low connection/link counting it at 24Mbps would still be 3MB/s. I even tried making a wireless Ad-Hoc network to transfer the files but when i went to Network it wouldn't show any shares.
I'm missing something to make it go faster and i really can't figure out what it is, maybe because I am too close to it.
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Oct 3, 2010
I would like to know if it is normal to experience 10MB/s data transfer rates during copying between partitions on my local hard drives (Toshiba 250GB 5400rpm SATA) while having three times faster (30MB/s) transfer rates between local partitions and USB drives (Kingston 8GB).
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May 30, 2010
I recently did a clean install of Ubuntu 10.04 and tried using a DLink DWL-G122 dongle for a wireless connection.
It seems to connect to the wireless router, but I cannot seem to access any websites using the wireless connection. Ethernet connections to the computer work perfectly, but ethernet isn't ideal.
The results of the lsusb command is code...
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Feb 23, 2010
I am using rhel4 with kernel 2.6.9-55 ELsmp. I have recently purchased 250gb seagate portable usb HDD. I have already mounted the usb HDD by updating Kernel with mode 755 and root user. I can transfer file from usb HDD to rhel system. But I am unable to make directory or copy file from rhel4 file system to usb HDD with ntfs. It is giving error message of permission denied though the device having write permission. I have already installed ntfsprog-2.0.0 in root. But there is no improvement. Is there any thing I can do to transfer data from linux system to ntfs.
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Jul 12, 2011
Same computer and flash. Two results on different OS:
Write speed under debian: 0.4 MB/s
Write speed under Windows: 6.6 MB/s
From what i've been reading on the net I guess it's something to do with the mount - sync option.
I've notice that there are couple of workarounds but all of them are pretty tedious.
Is there any simple (GUI - one/two clicks) tool that allow to mount/unmount flash disk easily using the correct options?
I'm using Squeeze 6.0.2 (Kernel 2.6.32-5-amd64), gnome 2.30.2
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Jul 15, 2011
Same computer and flash. Two results on different OS:
Write speed under debian: 0.4 MB/s
Write speed under Windows: 6.6 MB/s
From what i've been reading on the net I guess it's something to do with the mount - sync option. I've notice that there are couple of workarounds but all of them are pretty tedious.
Is there any simple (GUI - one/two clicks) tool that allow to mount/unmount flash disk easily using the correct options?
I'm using Squeeze 6.0.2 (Kernel 2.6.32-5-amd64), gnome 2.30.2
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Apr 7, 2010
I recently purchased an iRiver P7 media player which I am using with Rhythmbox under Ubuntu 9.04. The transfer speed when uploading files to the player is phenomenally slow - the first 50 or so MB reported virtually instantly then the speed immediately drops to about 12-15KB/sec yes KB/sec so a 3-400MB video file takes hours to transfer to the player. This happens with the internal memory and the added memory (SD card) too, althoufg it is faster ror the SD card. No other devices have ever behaved like this on this system (and I have used 2 different Creative players, a different iRiver player and numerous memory sticks). The computer is dual booting with windows (for once that was useful) and under windows it doesn't happen, the speed is as expected so it isn't the hardware. I don't want to have to resort to damned windoze just for this. dmesg after plugging in the player shows it identifying both the internal storage and the added SD card but I don't understand the rest of it:
[code]....
This last message gets repeated lots of times, and during transfers it seems to be issued continuously and I suppose this is why the system is so slow because it is always retrying loads of times before a success.
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Apr 6, 2011
I checked task manager the other day and I discovered that on the network history monitor some bits and bites were transfered in a repeating pattern (like a beacon). The transfer rate (when active) is about 149b/s receiving. And about 70b/s sending. What is this?
No Internet-related program was running from my part...In an attempt to pinpoint what was causing this, I occidentally removed the tools located left and right on the time and date. I've rebooted since but still no tools. The 0/I button is also gone.
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Aug 17, 2010
I would like to know if it is normal to experience 10MB/s data transfer rates during copying between partitions on my local hard drives (Toshiba 250GB 5400rpm SATA) while having three times faster (30MB/s) transfer rates between local partitions and USB drives (Kingston 8GB).
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Oct 2, 2010
I've been trying to make Linux my only OS and have run into another snag - this time with Firefox. I realize I could try Opera or Chrome but for this thread I'm concerned with Firefox.I still dual-boot and while I've always notice that Firefox doesn't scroll as smoothly as it does in Vista, this latest issue is a concern:
I'm on the BOD for a different club forum (hobby) and need to print a list of the new registrants for various reasons. Firefox initially presents the list in portrait mode but I need it to be in landscape. Generating the initial "print preview" then changing the "print preview" from portrait to landscape takes substantially longer than in Vista on the same box...it's 30-40 seconds in Vista and nearly 2 minutes in Linux - that's a huge difference!!
As I mentioned it's a dual boot so the hardware is the same and it shouldn't involve the HPLIP service as it's a preview.I don't know if this is an openSuse issue, Kernel issue or something else.
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