[TriLUG] Ethernet Question

[Steve Kuekes]

Thanks for the suggestion, but I don't think its disk I/O.  The server 
is an Athlon 2400+ with pretty fast SATA disks.  I can locally copy a 
~700 mb iso is about 15 seconds from one file to another on the disk.

So the mystery continues.

Brian Henning wrote:
> My first guess would be differences in the disk read/write performance 
> of the two systems.  If the server is a little clunkier and can only 
> store data at 500kb/sec, the transfer isn't going to go any faster.
> 
> On the other hand, for magnetic media it doesn't seem to make sense that 
> reads and writes wouldn't be the same speed (compared to, for example, 
> flash, where writes are much slower than reads), so that doesn't 
> necessarily make any sense either..  Unless perhaps the filesystem is 
> having to fragment the data, which would introduce more seek delays..
> 
> So I stand by my guess.  Disk I/O.
> 
> ~B
> 
> Steve Kuekes wrote:
> 
>> I'm having a strange problem on my home ethernet.
>>
>> I have two linux systems that are connected via a 10/100 hub, a linux 
>> workstation and a linux server, both running slightly different 
>> versions of Mandrake 10.0.
>>
>> When I do a sftp get from the server to the workstation for a large 
>> file (like an iso image) I get about 170kb/sec throughput (as 
>> indicated by sftp).  When I do a sftp put from the workstation to the 
>> server I get 500kb/sec.  And a get of the same file takes much longer 
>> than a put of the same file.  I've also noticed this performance 
>> problem reading from the linux server using a Windows/Samba connection 
>> and using a linux client using NFS.  Writing data is fast, but reading 
>> is slow.
>>
>> Any ideas on where to look for this problem?
> 
> 

-- 
Steve Kuekes

Insight Racing http://www.insightracing.org
Private Pilot: N9259R '95 Saratoga based at Sanford-Lee County Regional 
(TTA)
email: skuekes at nc.rr.com