Now, I didn't want to start a thread about how to deinfe "network throughput".
I just had been astonished by the large gap between signaling bandwidth (54Mbit) and the effective transfer speed I'm getting for the two two tested methods of file transfer (SMB and scp). Of course, there's a full stack of protocol overhead (physical layer> ...>IP>TCP>scp>"file transfer"), but here we're talking about a 25...30% max. (worst case). Further, signal quality on a radio link level doesn't allow to specify an exact number in general, but : I have a 54MB WiFi cell with a router and a single client (SB Touch). My PC is now connected via wire (100MBit) and there are no strong interfere for the radio link accoring to the SNR numbers I can get for from my router. This means we have a "half-duplex" WiFi link between router and SB Touch when transfering a large files (PC and SB Touch do not share bandwidth for up- and downlink!). What I get is a net file transfer rate of 500kByte/sec (4Mbit) for both scp and SMB. Now, do we really have >90% protocol overhead, etc .. ??? 4MBit net rate is way of from typical numbers you can get for a 54Mbit physical link with TCP/IP(scp/smb) file transfer. There must be a serious limiting factor ! (SB Touch CPU ?) Since I've "some" doubt's regarding my router (AVM Fritz!Box 3030), I was asking for other users experience and their "transfer rates". Meanwhile, I've switched my PC from WiFi to cable to double x-check. No influence. According to other forum posts (not in this forum), up to 3Mbyte/sec net SMB file transfer rate are possible between two WiFi clients in a 54MBit cell (no ad-hoc / via router,with shared bandwidth for up and downlink). Could anyone report his file transfer rate for SMB access via 54Mbit ? 500kByte is way below the typ. limits of USB storage devices (even the worst USB memeory sticks) There's no need to discuss these limits at the moments. -- streumix ------------------------------------------------------------------------ streumix's Profile: http://forums.slimdevices.com/member.php?userid=39267 View this thread: http://forums.slimdevices.com/showthread.php?t=80707 _______________________________________________ Touch mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/touch
