Network Problem AFP/SAMBA - MAC OSX 10.4.8 (Server & Desktop)

Question

Hi all,
I don't know if someone have already post this problem.
We have many Apple ( + - 200) as desktop (G5,G4 no Intel) and with the last 2 update of 10.4 (7&8) we have many problems with the volumes of the servers.
The servers have Linux as OS and Fullpress for Filesystem.
The linux version is : Red Hat enterprise Linux 3.
The Samba Version is : 3.0.14 a
The Full Press Version is : 15.01
10.4.7
In AFP sharing we see some folder with lock put from Old OS9 (with the other relase of 10.4 before 7 we don't see them).
10.4.8(desktop & server)
The network speed is very slow. If we copy from Server to Server or we copy from server to desktop the speed is avarage to 500-700 kb/s with 100mb or 1000mb network connection (LAN).
If we copy (with the same network setup in the client) from a Unix server with Helios the speed is more and more fast (from Fullpress 2 gb -> 2 hours from Helios 2gb -> 3 minutes)
the problem is , if we don't update to version 7 & 8 , the release 10.4.5(for example) copy the same file to server or desktop more and more and more fast (2gb from full press avg. 5 minutes).
How can we fix this?
(sorry for my english)
All   Mac OS X (10.4.8)   All System

Answer 1

"maybe change the protocol is a solution (but i can't change ) .
the "problem" is for esample if you have an Online Databank with images/xpress/indesign ( for me with fullpress and helios) and if we change the protocol we "destroy" the resources of files and something going wrong in the db(many many problems).
We must use Fullpress and Appleshare (years and years of data stored) and a change is not very easy."
Well not necessarily. Im sure your system coud be tranistioned to something new. You have all the data.. its just a matter of converting to another system. I doubt its impossible - just REALLY expensive
"For the fullpress (i'm not sure) i think to listen talk about bonjour , but i'm not sure and i don't knows the difference from appleshare (that "fullpress" says it is an old protocol).
Time ago i have also 6 Silicon with Full press but Os X don't have problem , but the Os arrived at version 10.4.5 so... The helios (in appleshare and smb) don't have problem."
Well technically i beleive Appleshare was basically the old afp protocol over appletalk, this is pre OS X (so OS n-9.x.x). Appletalk was the old apple networking protocol similar to what Bonjour is now. However now afp runs over tcp/ip and 3.0 functions more like NFS or SMB. You can access it with Bonjour networking or standard tcp/ip. I cant imagine this Full Press software not supporting that from here on out. I suspect most bureaus are all but rid of non OS X macs so it would make sense theyd let appleshare support die while moving to afpovertcp, smb and possibly webDAV and NFS.
"Now i think maybe is a problem of Linux and how manage the connection , but something change in the clients (upgrade) and not in the servers so....."
THis is most likely the case.. or something very simiilar.