data transfer rates between networked computers

[Lorenzo Sandini]

Hi,

Just curious about what you people observe on your home networks. I have
a house on 2 floors, and use a Linksys WAG54G ADSL router with a 4 ports
switch. The router is upstairs, and computers are connected either
wirelessly or by wire. I think I get the transfer rates that are
expected with such a setup.

Now with prices dropping, I am recycling the old trusty Linksys and
bought myself a D-Link DGL-4300 router (108Mbps max on WLAN), with
Gigabit switch built-in.

One computer (XP pro) readily had a Marvel Yukon Gigabit interface on
the motherboard, and I added a low-profile PCI intel gigabit NIC in a
linux pizza box.

I haven't tried a crossover cable between 2 machines, they are both
connected to the gigabit switch. What are the expected sustained
transfer rates for big MPG2 files (video editing) from one machine to
the other if both machines ? The Linux machine (Fedora Core 4) is a PIII
1 GHz, the windows machine a P4 3.2 GHz, both with fast HDDs.

I don't have a WLAN NIC on the linux box (I want it cabled), but what if
the linux box is to host most of my starage, and I need to access the
data through WLAN adapters on laptops and desktops ? (108Mbps compatible
WLAN adapters that is).

With the Linksys router (100Mbps switch), I got around 12 MB/s from one
cabled to the other cabled machine, if one machine was on WLAN (54G)
then around 4 MB/sec only.

I know I am not to expect a 10-fold increase, but what typical speeds
are you seeing with a similar setup ? Haven't run any tests yet, or even
tweaked NIC settings (jumbo frames, half/full duplex, etc...).

Any benefit of Cat5e over Cat5 cable ?

Lorenzo
www.brokenbones.d2g.com

 

[Al Dykes]

Hi,

Just curious about what you people observe on your home networks. I have
a house on 2 floors, and use a Linksys WAG54G ADSL router with a 4 ports
switch. The router is upstairs, and computers are connected either
wirelessly or by wire. I think I get the transfer rates that are
expected with such a setup.

Now with prices dropping, I am recycling the old trusty Linksys and
bought myself a D-Link DGL-4300 router (108Mbps max on WLAN), with
Gigabit switch built-in.

One computer (XP pro) readily had a Marvel Yukon Gigabit interface on
the motherboard, and I added a low-profile PCI intel gigabit NIC in a
linux pizza box.

I haven't tried a crossover cable between 2 machines, they are both
connected to the gigabit switch. What are the expected sustained
transfer rates for big MPG2 files (video editing) from one machine to
the other if both machines ? The Linux machine (Fedora Core 4) is a PIII
1 GHz, the windows machine a P4 3.2 GHz, both with fast HDDs.

I don't have a WLAN NIC on the linux box (I want it cabled), but what if
the linux box is to host most of my starage, and I need to access the
data through WLAN adapters on laptops and desktops ? (108Mbps compatible
WLAN adapters that is).

With the Linksys router (100Mbps switch), I got around 12 MB/s from one
cabled to the other cabled machine, if one machine was on WLAN (54G)
then around 4 MB/sec only.

I know I am not to expect a 10-fold increase, but what typical speeds
are you seeing with a similar setup ? Haven't run any tests yet, or even
tweaked NIC settings (jumbo frames, half/full duplex, etc...).

Any benefit of Cat5e over Cat5 cable ?

Some people seem to have too much time and money on their hands.

Switching to 5e wil not get you anything, assuming the CAT5 is
installed properly.

I avoid non-standard equipment, in general, and WiFi in particular.
It gets obsolete very fast.

What task is it that you would like to go faster?

- The Old Curmudgeon

 

[johns]

I'm getting up to 60 mb. Mess with the duplexes. Seems
they default to 10 mb max under certain conditions, even
on gigabit lans. Black magic to me, but I just keep poking
away until it works. Some nic drivers can cause this.

johns

 

[Al Dykes]

I'm getting up to 60 mb. Mess with the duplexes. Seems
they default to 10 mb max under certain conditions, even
on gigabit lans. Black magic to me, but I just keep poking
away until it works. Some nic drivers can cause this.

johns

If all our hadware is 100b capable but it doesn't handshake above
10Mb you've probably got crappy cables.

 

[Paul]

Hi,

Just curious about what you people observe on your home networks. I have
a house on 2 floors, and use a Linksys WAG54G ADSL router with a 4 ports
switch. The router is upstairs, and computers are connected either
wirelessly or by wire. I think I get the transfer rates that are
expected with such a setup.

Now with prices dropping, I am recycling the old trusty Linksys and
bought myself a D-Link DGL-4300 router (108Mbps max on WLAN), with
Gigabit switch built-in.

One computer (XP pro) readily had a Marvel Yukon Gigabit interface on
the motherboard, and I added a low-profile PCI intel gigabit NIC in a
linux pizza box.

I haven't tried a crossover cable between 2 machines, they are both
connected to the gigabit switch. What are the expected sustained
transfer rates for big MPG2 files (video editing) from one machine to
the other if both machines ? The Linux machine (Fedora Core 4) is a PIII
1 GHz, the windows machine a P4 3.2 GHz, both with fast HDDs.

I don't have a WLAN NIC on the linux box (I want it cabled), but what if
the linux box is to host most of my starage, and I need to access the
data through WLAN adapters on laptops and desktops ? (108Mbps compatible
WLAN adapters that is).

With the Linksys router (100Mbps switch), I got around 12 MB/s from one
cabled to the other cabled machine, if one machine was on WLAN (54G)
then around 4 MB/sec only.

I know I am not to expect a 10-fold increase, but what typical speeds
are you seeing with a similar setup ? Haven't run any tests yet, or even
tweaked NIC settings (jumbo frames, half/full duplex, etc...).

Any benefit of Cat5e over Cat5 cable ?

Lorenzo
www.brokenbones.d2g.com

For benchmarking, I've set up RAM disks on two gigabit lan
equipped machines, and with Win2K, the max I can get in an
FTP transfer, from the RAM disk on one computer to the
other, is ~46MB/sec or so (that is 368mb/s of a possible 1000mb/s).
Note that the performance was not symmetric, and 46MB/sec is
not a realistic target with real disks and everyday performance.

http://groups.google.ca/group/alt.comp.periphs.mainboard.asus/msg/a0b9dfaa59c87724?dmode=source

There are some suggestions here, and at the time I didn't attempt
any optimizations in my tests above. It might be faster to use
drive trays and just walk the disk from one machine to the other
There are now SATA cards with ESATA connectors and external SATA
enclosures that support hot swap, so there is no reason to not
be able to run a single disk at maximum speed plus have the
convenience of using "sneakernet".

http://forums.2cpu.com/showthread.php?s=e37051dc04c9d4e98cde288f47e4ff14&threadid=38633

Paul

 

[Dude]

Lorenzo
www.brokenbones.d2g.com

ya you might peak 108jbs+,-

 

[John Weiss]

Just curious about what you people observe on your home networks. I have a
house on 2 floors, and use a Linksys WAG54G ADSL router with a 4 ports switch.
The router is upstairs, and computers are connected either wirelessly or by
wire. I think I get the transfer rates that are expected with such a setup.

My 100 Mbps wired Ethernet tops out at about 73-75 Mbps burst, and the wireless
Linksys GS (Speedbooster) tops out a bit over 50 Mbps; both as measured by Task
Manager. Normal sustained rates are well below that.

I think you'll find the HHDs are the choke points. My older laptop was
significantly slower than the other computers over the net when it had a 4200
RPM HD. It's significantly faster with a 7200 RPM HD...

 

[Dude]

My 100 Mbps wired Ethernet tops out at about 73-75 Mbps burst, and the wireless

that's slow

i always get at least 1G

 

[John Weiss]

that's slow

i always get at least 1G

Sure... I believe you almost as readily as michael jackson!

 

[Dude]

Sure... I believe you almost as readily as michael jackson!

well, i could transfer a chunk of data, and hit screen capture, post
the picture of the data rate displayed, but then you'd accuse me
photoshopping the results!

what is so hard to believe about 1000kbs

 

[Dude]

Sure... I believe you almost as readily as michael jackson!

http://barryparrish.com/Image1.jpg

i tell no lie

it actually jumped to 2.09 this morning, but leveled out at 1.75MBs

 

[John Weiss]

well, i could transfer a chunk of data, and hit screen capture, post
the picture of the data rate displayed, but then you'd accuse me
photoshopping the results!

what is so hard to believe about 1000kbs

Nothing, on a Gigabit net. However, you claimed 1 G, which is 1000Mbps!

 

[Dude]

Nothing, on a Gigabit net. However, you claimed 1 G, which is 1000Mbps!

gasp! 1G is short for 1 grand which is 1000

1GB is Gigabyte to me anyway.

so sorry for the deceptions