Take the 2-minute tour ×
Server Fault is a question and answer site for professional system and network administrators. It's 100% free, no registration required.

I got a file server that is connected via an HP switch to multiple clients. The clients are mapping network drives of shared folder on the server and copy files from an external e-sata drive to the server.

All adapters, switch and cables are 1Gbe. the connection on all machine indicate as 1.0Gbe

When a single client is copying files to the server, i'm getting nice copy speed, around 90MB/s.

When two clients are copying files to the server, i can see a drop down in the copy speed, to around 60MB/s per client.

Is it normal?

should the clients effect each other because of the 1Gbe bottleneck? the server got a fast 16 drives raid so storage speed is not the issue.

Clients are a mix of Win 7 Pro x64 and Win XP Pro x32 and the server is Win Server 2008 R2.

Thanks

Dori

share|improve this question
add comment

1 Answer 1

up vote 0 down vote accepted

Yes. At 90MB/sec you are at .72 Gigabits/sec. When you factor in protocol overheads, that's pretty good throughput.

share|improve this answer
    
so 1.0Gbe=125MB/s total throughput. And its normal to get a speed drop down when copying files from multiple machines to the same server? –  user152175 Feb 28 '13 at 19:23
    
There are multiple layers of protocols that add overhead, like TCP for example. You will not get 125MB/sec on a gigabit link at the application level. As for the 'speed drop down', yes. You have a maximum amount of data the physical link can handle. It's basic division. –  yoonix Feb 28 '13 at 19:30
    
Thanks. understood. –  user152175 Feb 28 '13 at 19:33
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.