Home gigabit network throughput?

ChrisLX200 · 5 Apr 2006 at 12:34

V-Spec said:
As its been said hundreds of times, your hdds will be the bottleneck, the max theoretical speed of 1Gb is 125MBps, problem is its ethernet so you only get 70% of that... your doing pretty well with 30MBps, I certainly wouldn't be complaining..

I'm not complaining, but we all want whatever hardware we have to run at best speed possible!

I've seen figures of 50MB/sec bandied about and figured that was the target to go for. I think I'll try setting up some RAM disks on 2 machines and see what speed I get like that.

Still haven't figured out what I need to do to get jumbo frames working.

Skilldibop · 5 Apr 2006 at 12:42

Just had a CRAZY thought...how are you measuring your throughput? might be worth plugging into your router and checking CRC and input error rates. That will tell you if your cable/ adapter is dodgey.

ChrisLX200 · 5 Apr 2006 at 19:56

Skilldibop said:
Just had a CRAZY thought...how are you measuring your throughput? might be worth plugging into your router and checking CRC and input error rates. That will tell you if your cable/ adapter is dodgey.

Well I don't go through the router for LAN connections, the router hangs off the DLink gigbit switch (setup is much like encephalopathy's)

I used SiSoft Sandra (which gives the figure of 29-30MB/sec) and also DuMeter to monitor transfer of a 4.5GB test file. Interestingly, the latter test gives in one direction 19MB/sec (from the Opty to an Intel 3GHz PC), and 29MB/sec the other direction. The Opty is initiating the transfers both ways. Both HDs in use are new and similar spec (albeit one is SATA I and the other ATA).

V-Spec · 5 Apr 2006 at 22:10

If you really wanna see what the throughput of your network can handle, you need a traffic generator, this will make a pc generate traffic at line rate, the one I use on gigabit networks for testing qos and congestion alongside VOIP, video and bulk traffic is called "Lan Traffic V2" do a google search and try it.
You need 2 pcs with gigabit cards, install the software on 2 machines and set one as the sender and one as the receiver, you can then generate traffic at line rate for any protocol and watch it be received, along with jitter/loss statistics. As its not limited to HDD speed, you can set it to generate different types of data with its algorithm, compressed traffic is handled differently from uncompressed traffic, loads of other options.

Skilldibop · 6 Apr 2006 at 16:17

ChrisLX200 said:
Well I don't go through the router for LAN connections, the router hangs off the DLink gigbit switch (setup is much like encephalopathy's)

well dergh, 99.99%of routers are 10/100.
You connect to the router to use it's error checking facilities. High levels of input errors will result in loss of throughput. It's an elimination test.

OllyM · 6 Apr 2006 at 18:31

Unless the router has a managed switch inside it, it won't do anything...

Most/all consumer routers are unmanaged.

Skilldibop · 7 Apr 2006 at 11:14

They nrealy all have error counters on both WAN and LAN interfaces though.
What i actually suggeted was take the cable out of the switch and put it in the router, do a bit of dowloading and see what the LAN side error rates are. This will tell you if you have a bad cable/RJ45 port