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You are here: MacNN Forums > Enthusiast Zone > Networking > Max throughput of Gigabit ethernet on PowerMac G4?

Max throughput of Gigabit ethernet on PowerMac G4?
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zerostar
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Sep 11, 2006, 09:42 AM
 
**Posted this in the proper forum now, feel free to move the other!**

Basically I am trying to find out if anyone is achieving greater speeds than my setup with an older G4 Tower.

I am using the built-in ethernet connecting at 1000T full duplex. I have a 3-drive RAID 0 using 2 SATA Drives on a PCI Card, the drives pull about 130MB Read/Write locally but over the network they are pulling around 50MB Read 65MB Write

Is this just a limitation of the machine? I thought gigabit could do 125MB?

I am using a Dell 48 port gigabit switch and all Cat 6 cabling. The Host is a Quicksilver 1.5GHz single G4 with 2GB Ram running OS X Server 10.4.7

Any Ideas or other tests I can do?
     
Camelot
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Sep 12, 2006, 01:27 AM
 
Yes, theoretically gigabit ethernet can achieve 125MB/sec, but you are never going to get that on a single host. Most networks run at about half the theoretical speed, and that's what you're getting, so you're about right.
Gods don't kill people - people with Gods kill people.
     
zerostar  (op)
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Sep 12, 2006, 07:28 AM
 
Ok just checking, I am thinking of other ideas for sharing the data with 4 machines, something like a fibre channel setup. Then just let the OS X Server do its duties (print que, mail, web) without the file sharing pressure.
     
Camelot
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Sep 12, 2006, 12:45 PM
 
I'm not sure how you expect to integrate fiber channel into this setup unless you're talking XServe RAID, in which case you'll need the RAID, a fiber channel switch, HBAs, etc. - you're talking $20K now (at least for a fully-loaded XServe RAID). At that rate you could replace all your machines with new quad-core MacPros with a terabyte of storage each, eliminating the network bottleneck altogether.
Gods don't kill people - people with Gods kill people.
     
zerostar  (op)
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Sep 16, 2006, 09:16 PM
 
Right, but the problem is we all need to access each-others files and they need to be centralized the way our backups and general workflow goes. We might just be stuck at gigabit speed.

I did find out that our cable is Cat 5e and upgrading it to Cat 6 would probably not do much for us.
     
   
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