Re: Slow network with F13

john wendel wrote:
I've got a couple of boxes connected with wire and a gigabit ethernet
switch. With F11 on the sending and receiving sides, I see a transfer
speed of ~ 40 MB/s transfering large files. With F13 on the sending box
(same box, just new software), I get a transfer speed of ~ 23 MB/s with
the same files. The disk read speed on the F13 box looks to be ~ 75
MB/s, so it doesn't seem to be the bottleneck.

I'm not sure where to start looking. Any help will be much appreciated.

Since you only changed the OS at the sending end, that lets out a slowing of
disk write on the receiver. Since you have tested the speed of disk reads and
found it adequate, it's likely that the issue is the network code on the sending
end.

However... do check the speed of reading that particular file. Remember that
different parts of the disk are faster than others, even on Linux files
fragment, etc. The easy way to do this is:
dd if=my.file of=/dev/null
and dd will report the speed. You can see as much as 50% slower on inner tracts,
so it's at least a possibility.

--
Bill Davidsen <davidsen@xxxxxxx>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot
--
users mailing list
users@xxxxxxxxxxxxxxxxxxxxxxx
To unsubscribe or change subscription options:
https://admin.fedoraproject.org/mailman/listinfo/users
Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines

Relevant Pages

  • Re: delayed write failed
    ... an increasing number of users in our organisation are receiving this ... The "Enable write caching on the disk" feature for your disk is turned on. ... Your Ultra Direct Memory Access hard disk controller is configured in ... You are using a 40-wire connector cable to connect the UDMA drive to the ...
    (microsoft.public.windowsxp.general)
  • Re: AACP - Apple-to-Apple Copy
    ... terminal program will suffice, ... the received file from a remote Apple can be saved to disk, ... KERMIT works for me in transferring single files from PC to Apple 2e. ... receiving computer as a 1 MHz Apple 2 is rather slow at data comm. ...
    (comp.sys.apple2.comm)
  • Re: NDISPROT read and speed problems.
    ... Receiving NIC runs out of resources ... NdisProt discards received packets due to your app. ... If you also need to write all packet data to disk - well, ok, but think ...
    (microsoft.public.development.device.drivers)
  • Low Disk Space
    ... Using VPC running XP Pro, but receiving a warning message in the taskbar ... stating "Low Disk Space" (message also states you are running out of disk ... MyComputer), but the space available in MyComputer only shows 150mb free ...
    (microsoft.public.mac.virtualpc)
  • Re: not receiving anything from users at lists.fedoraproject. [SOLVED]
    ... not receiving anything from users at lists.fedoraproject. ... G ood morning, ... To unsubscribe or change subscription options: ... Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines ...
    (Fedora)