[volunteergrid2-l] upload speeds

[erpo41 at gmail.com]

>
> I'm seeing around 200Kbps upload speed from my server. Is this typical?
>>
>
> Are you positively, or negatively, surprised? :-P
>

Negatively?


> The number seems pretty typical to me. Remember that a) most of the people
> here are not on "commercial" broadband lines, but have typical
> "residential" connections, and b) you are uploading multiples of the actual
> data volume because of redundancy.

What might be even more surprising if you're on a broadband connection is
> that downloads tend to be slower than uploads -- simply because your
> download uses other nodes' upstream bandwidth (which, for residential
> connections, is typically only a fraction of their downstream bandwidth).
>
>
Indeed; I had factored in the asynchronous nature of residential Internet
connections. As far as uploading multiples goes, I'm measuring the upstream
speed with iftop, which counts raw bytes coming out of my server's network
interface, so the multiplying effect of erasure coding shouldn't be a
factor.

So, what is the bottleneck?

*I don't think it's my CPU since the load average on my server is 0.19.
*I don't think it's my upstream connection since I have about 1000Kbps
upstream capacity and I'm not using it for anything else.
*I don't think it's everyone else's downstream connection because those are
typically way faster than 200Kbps.
*I don't think it's anyone else's CPU because the encryption and erasure
coding are done on my machine.

I'm at a loss.
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