RE: Slow file-upload to share, 2003 server.

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Seem to have solved it. There is evidently a problem with the onboard NIC or
its driver, and the problem only goes away if this is fully deactivated.
Using a second NIC with the onboard still active -as I first tried- the
problem still manifests, hence confusing result.

"Anteaus" wrote:

Investigating a problem of slow upload of files to a server share.

When downloading files to a client, or when using the server console to copy
files to or from another server, the LAN throughput is ~7MB/s which seems
about typical for a 100Mb/s link.

However, when uploading a file from a client to a server share, the
throughput is half that at best, and seems to suffer a further drop in speed
after perhaps 30sec or so of copying, to as low as 1-2MB/s. From then on the
speed fluctuates from 0.5MB/s to 3MB/s, and the total copy takes about 4-6
times as long as it should.

The client copies the same files to another (Debian) server at full speed,
so I think we can rule-out a client problem.

There are no processor-intensive tasks running, and during the copy the
utilization of both CPU and LAN are moderate. A disk-to-disk copy on the
server is >10x the LAN speed, which suggests it's not a disk throughput
problem.

I've tried:
Updating LAN driver.
A different LAN card, RTL8139.
Changing various LAN card parameters, including forcing 100 Duplex.
Changed the relative priority of services/applications.
No joy.

Seems to me it cannot be a LAN interface or IP problem anyway, as the server
can download AND upload files from/to its own console at full speed. It looks
more like a problem with the server process itself.

Any suggestions?

.

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