[OPLINTECH] Dropbox and File Sharing

[Karl Jendretzky]

My curiosity got the best of me. 

-5 Tests
-Each 60 seconds long
-The two YouTube videos where each ~4:00 long
-Adblock Plus was enabled, so numbers don't include Flash ads
-Taken by using Wireshark to capture all packets on eth0
-Each line is "Test Name: Average Bandwidth over 60 sec; amount of data downloaded (notes)"

Control: .001 Mbps
Minecraft: .285 Mbps; 2MB downloaded (runs at about 100Kbps after initial area loaded. Probably a bad example of an online game due to abnormally large amount world data)
360p Youtube Video: 1.479Mbps; 11MB (didn't finish downloading, ran at full the entire time)
720p YouTube: 11.3Mbps; 87MB downloaded(finished downloading then nothing, ran at ~25Mbps for 30 seconds)
Flash Game (armorgames.com): .819Mbps; 6MB downloaded (ran at ~25Mbps for 5 seconds, then nothing)
Runescape: .064Mbps; 468KB downloaded (ran at ~40Kbps the entire sample)


Karl Jendretzky
Technology Manager
Ohio Public Library Information Network
jendreka at oplin.org
(614) 728-1515 

----- Original Message -----
From: "Karl Jendretzky" <jendreka at oplin.org>
To: oplintech at lists.oplin.org
Sent: Thursday, September 29, 2011 1:29:56 PM
Subject: Re: [OPLINTECH] Dropbox and File Sharing

I'd be pretty surprised if online gaming was a big bandwidth eater. For client/server based games all the big graphics should be stored locally, and for Flash games you should only be looking at the initial download, which would be much better than a Youtube video if you consider the ratio of data downloaded vs time spent. 

If anyone is curious, I'd be happy to run some tests and report back that stats. I'll play some Minecraft at the office......if I must.

Karl Jendretzky
Technology Manager
Ohio Public Library Information Network
jendreka at oplin.org
(614) 728-1515 

----- Original Message -----
From: "Nathan Eady" <oplintech at galionlibrary.net>
To: oplintech at lists.oplin.org
Sent: Thursday, September 29, 2011 12:53:12 PM
Subject: Re: [OPLINTECH] Dropbox and File Sharing

"Stephen Cram" <steve at nbpubliclibrary.org> writes:

> Chad,
>
> You might want to ask OPLIN about your bandwidth use.  Downloading
> files with a gazillion GB will really use up a lot of bandwidth.
>
> We block those sites here in North Baltimore.  We allow gaming and
> music downloads - that slows access down noticibly now.

I'm pretty sure blocking Dropbox and allowing online gaming is, from a
bandwidth perspective, kind of like putting bars on the upstairs windows
and leaving the ground-floor windows wide open.  Under anything
resembling normal usage conditions, I would not expect Dropbox to
consume even 1% of the bandwidth that online gaming does.  (Granted,
it'll be rather spikier usage, but still.)

-- 
Nathan Eady
Galion Public Library
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