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download speed from NY to LA

Posted on 2011-02-14
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Last Modified: 2012-06-27
I am a  testing a server in New York datacenter and I tried to download a (135 Mb) file from a server in Los Angeles.

From New York  I am getting at 451.99KB/s and takes me about 14 minutes to download the file. From a server in different datacenter in Los Angles I get about 6657.31KB/s and takes me about 22 seconds to  download the file.

I was just curious if the speed I'm getting from New York to Los Angeles is good? Or is my download rate slow?
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Question by:ShadowColossus
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by:Mez4343
ID: 34892364
Download speeds will vary from either Server since they are different access points. The most likely problem is that the first LA server is on a slow connection or experiencing heavy traffic and its not an issue with your NY connection to the internet.

Bottom line is you can only verify 1 access point to another. The idea that 2 servers existing in the same sort of location should have the same download speed is not guaranteed.

To verify your NY download speed to LA indepenently, I would run a Speedtest. I use http://www.dslreports.com/speedtest?java=1 and they have a LA server for you to test.
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by:ShadowColossus
ID: 34892654
Hello,

I tried the speedtest from Washington and got a 70Mb/sec download 40Mb/sec upload on a server in LA. If I try a server in NY I get about 104Mb/sec and 64Mb/sec upload.


I think there is some confusion. I am trying to download a file from Los Angles. From another server in LA (different datacener) I could download the file in about 22 secs. If I try to download the file from NY it takes me about 6 minutes. I  am not trying to download a file from two different servers in the same location.


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by:Mez4343
ID: 34899405
yea i understand that you are not trying to download at the same time.

Is this what your doing?

1) NY machine1 -> LA Server 1 = 22 sec
2) NY machine1 -> LA Server 2 (different datacenter) = 14-22 minutes

If yes, my point is just because both servers are in same general location (LA area) you cant expect similar download speeds. Each datacenter has their own bandwidth and traffic situations that will affect your download speed.

You may want to run a traceroute on each download to see if there are different paths.
http://msdn.microsoft.com/en-us/library/cc779346(v=ws.10).aspx

If the paths are similar, then the problem is the LA server on download#2 above
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Author Comment

by:ShadowColossus
ID: 34900476

Hello,

This is how I'm downloading

1) NY Machine -> LA server 1 = 6 minutes
2) LA server 2 (diff datacenter) -> LA server 1= 22 seconds

The file is 135 Mb. Is 6 minutes download a good speed? Traceroute from both paths are decent (about 80 ms between NY and LA).


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Mez4343 earned 1000 total points
ID: 34900717
135MB at 6 minutes (about 452 KB/s) is not great but it seems that you are comparing 2 different things.

Your NY machine got a 70 Mb/s download to Washington when running the speedtest which is good.

So the NY -> LA Server1 of 6 minutes could be an issue with bandwidth/traffic on LA server1 but comparing that to the LA server2 -> LA server1 download cant really be be compared equally because 1) they are totally differnt End points and 2) the physical location is much less.

hope this helps.

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Author Comment

by:ShadowColossus
ID: 34975756
Thanks for your help Mez4343 I will look into this and let you know, I also been looking at http://www.ipbalance.com/traffic-analysis/throughput/104-tcp-throughput-calculation-formula.html for tcp throughput.
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