undefined | Better HN

0 pointsrottyguy10y ago0 comments

How long does it take to transfer a gigabyte file? Sure we can do the math but why (considering the average person)? Maybe there should be a common core revolution in engineering :-)

0 comments

jo90910y ago

I can't do the exact math for that without looking up up a bunch of stuff.

I don't how much I need to subtract for the multiple headers and other overhead, how fast the transfer rate gets to the maximum, how many packages get lost, what other factors of the congestion control algorithms might impact my transfer etc

jdiez1710y ago

I just divide by 10. How long will it take to download a 100MB file with a 100Mbps connection? Approximately 10 seconds. I know that the theoretical maximum is 8 seconds, but practical factors like flow control and all that more or less cancel out the 20% error.

Tepix10y ago

Try this bandwidth calculator (it's in German, but I think it's not hard to understand)

http://www.heise.de/netze/tools/bandbreitenrechner/

jo90910y ago

You are missing my point: the raw bit rate of the network is not the rate of file transfers. There is a bunch of logic around the raw bits in the wire that make it mich more complicated than dividing by 8

2 more replies

Spooky2310y ago

Ask Google:

  100 Mbps in MBps.
  250GB / 100 Mbps
  100 Mbps * 0.8 in MBps

j / k navigate · click thread line to collapse

0 comments

jo90910y ago

I can't do the exact math for that without looking up up a bunch of stuff.

jdiez1710y ago

Tepix10y ago

Try this bandwidth calculator (it's in German, but I think it's not hard to understand)

http://www.heise.de/netze/tools/bandbreitenrechner/

jo90910y ago

2 more replies

Spooky2310y ago

Ask Google:

  100 Mbps in MBps.
  250GB / 100 Mbps
  100 Mbps * 0.8 in MBps

j / k navigate · click thread line to collapse