[tahoe-dev] Tahoe-LAFS v1.8 planning / Administrivia / Big Picture

Francois Deppierraz francois at ctrlaltdel.ch
Mon Nov 15 11:02:29 UTC 2010


Hi,

On 11/15/2010 07:16 AM, Zooko O'Whielacronx wrote:

> In fact, could you run this a few times and collect multiple
> measurements? Maybe it was just a transient "fluke" -- some kind of
> noise on your network or one of your machines interfered with the
> download.
> 
> If it wasn't a fluke I wonder if it could be the effect of issue
> #1223, which is fixed in trunk (== 1.8.1 release candidate). #1223
> should have the impact of slowing downloads, but I'm not sure by how
> much.

Oh, sorry I made a mistake in the previous mail, the version this server
is running is 1.8.0-r4784 which is only 9 patches away from trunk. So
the fix for #1223 was actually already in.

It seems that encoding parameter has a huge impact on download speed.
This is the average time in seconds across three runs that a 100 MB file
download takes depending on the encoding parameters.

1-of-3     58
2-of-3     63
3-of-3     58
10-of-30  210
20-of-60  394

> Anyway, is the overall performance good enough for your current uses?

As usual, I would love to see better performances in those use cases.
But it's not currently a show-stopper for me.

François


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