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Forum Discussion
uploading to NAS over gigabit LAN speeds good?
I am uploading from my laptop to the RadyNas Ultra 4 plus. Connected on the Wire. Netgear gigabit switch in between. I am using filezilla to upload (ssh) I am getting 1-2MB/s steady. is thi...
Check the MTU size on your laptop's NIC to ensure packets are not being fragmented over the network.
You might also want to check the auto-scaling feature of Windows if your using Vista / 7. Auto scaling attempts to increase the MTU of the machine incrementally when Windows detects it can support a higher MTU than currently set. There sre two issues with this approach as far as I can see; Firstly the constant checking generates additional traffic, and secondly any packets lost due to failed attempts at raising the MTU of the source machine will affect write performance to the NAS as those packets need to be re-sent.
The NAS itself can intelligently negotiate it's packet size down to a level that it's packets are not fragmented en-route to your PC. However, if your PC is constantly attempting to raise this value (and failing) your read/write performance will suffer. It's because of this auto-tuning feature in Windows Vista / 7 (which was designed to stop people having to adjust MTU's manually) that performance can suffer over wireless connections. A desktop wired NIC will respond quicker than a wireless one in my experience and so adjust for changes in MTU easier than the wireless connection, which also has to deal with other considerations like signal strength and interferance.
1-2MB/s is about what you can expect for Wireless-G, but you should expect 8-10MB/sec for a wired 10/100 ethernet connection and faster for Gigabit connections (depending on the NAS / Switch / Router used on your network). Also, it's likely that your router won't support jumbo frames, even if your desktop PC and the NAS do. Most consumer Netgear routers for example don't support jumbo frames. But by adding in a network switch and connecting your NAS and PC to that via Gigabit LAN, you bypass the router, which will then only be responsible for assigning an IP address to those devices if your using DHCP. Any subsequent communications between the Gigabit-enabled PC and the NAS ought to go direct to each other via the switch. I bought one for exactly this purpose.
Search Google for instructions on how to set your MTU under Windows and look into either "restricting" or totally disabling the auto-tuning feature of Vista / 7 if that's what you desire. There are also other TCP settings that can be adjusted at the same time such as side-scaling, chimney offload and congestion detection, but these features (and your ability to use them) will depend on the hardware your using. your main concern is restricting the auto-tuning feature and getting a good MTU size, and then you should see much improved performance.
You might also want to check the auto-scaling feature of Windows if your using Vista / 7. Auto scaling attempts to increase the MTU of the machine incrementally when Windows detects it can support a higher MTU than currently set. There sre two issues with this approach as far as I can see; Firstly the constant checking generates additional traffic, and secondly any packets lost due to failed attempts at raising the MTU of the source machine will affect write performance to the NAS as those packets need to be re-sent.
The NAS itself can intelligently negotiate it's packet size down to a level that it's packets are not fragmented en-route to your PC. However, if your PC is constantly attempting to raise this value (and failing) your read/write performance will suffer. It's because of this auto-tuning feature in Windows Vista / 7 (which was designed to stop people having to adjust MTU's manually) that performance can suffer over wireless connections. A desktop wired NIC will respond quicker than a wireless one in my experience and so adjust for changes in MTU easier than the wireless connection, which also has to deal with other considerations like signal strength and interferance.
1-2MB/s is about what you can expect for Wireless-G, but you should expect 8-10MB/sec for a wired 10/100 ethernet connection and faster for Gigabit connections (depending on the NAS / Switch / Router used on your network). Also, it's likely that your router won't support jumbo frames, even if your desktop PC and the NAS do. Most consumer Netgear routers for example don't support jumbo frames. But by adding in a network switch and connecting your NAS and PC to that via Gigabit LAN, you bypass the router, which will then only be responsible for assigning an IP address to those devices if your using DHCP. Any subsequent communications between the Gigabit-enabled PC and the NAS ought to go direct to each other via the switch. I bought one for exactly this purpose.
Search Google for instructions on how to set your MTU under Windows and look into either "restricting" or totally disabling the auto-tuning feature of Vista / 7 if that's what you desire. There are also other TCP settings that can be adjusted at the same time such as side-scaling, chimney offload and congestion detection, but these features (and your ability to use them) will depend on the hardware your using. your main concern is restricting the auto-tuning feature and getting a good MTU size, and then you should see much improved performance.
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