[volunteergrid2-l] Network speed on volunteergrid2

[Vlastimil Ovčáčík]

Hi Shawn,

thanks for the reply. It's home computer and for various reasons (especially
undisturbed sleeping) I can't improve its availability. I plan to convert it
into home server once I buy new pc, but its not going to happen any time
soon :( As I see it now, it does not make sense to let someone with 55 %
availability in the grid if you actually maintain 95 %.

The speed sounds painfully, I reckoned that it could be at least 4 Mbps or
more likely around 10 Mbps. I am wondering if this is typical speed for
everyone in the grid? Anyway I read on Tahoe wiki that they improved
transfer speeds in the latest version - 2 MBps to 4 MBps on LAN. I guess
over-the-internet speeds will improve also.

Vlastimil

On Fri, Sep 23, 2011 at 16:57, Shawn Willden <shawn at willden.org> wrote:

> Hi Vlastimil!
>
> 2011/9/23 Vlastimil Ovčáčík <v.ovcacik at gmail.com>
>
>> I'm new to this mailing list and I am thinking of joining volunteergrid2
>> (if you are opened).
>
>
> We are actively seeking more members/storage nodes.
>
>
>> The idea is to use volunteergrid2 as my backup. I'd like to share/give 1
>> TB and store 300 GB in (3-10 settings).
>
>
> Sounds perfect.
>
>
>> My ISP will soon upgrade my connection to 20/20 Mbps (which will be
>> effectively 15/15 Mbps or more).
>
>
> Should be just fine.
>
>
>> The only requirement I can't actually meet is 95 % uptime, it is rather 50
>> - 60 %.
>
>
> Hmm.  50-60% uptime is pretty low availability.  One of the key goals of
> this grid is to achieve high availability for both reads and writes.  Thanks
> to Tahoe, read availability should be near-perfect even with a few nodes
> down, but write availability is a different matter; we really need to ensure
> that most of the grid is always available.  Even with 95% per-host uptime,
> with 20 hosts at least one host will be down 65% of the time.  If we were to
> accept 60% uptime we'd always have multiple hosts unavailable.
>
> Is there something you can do to improve that uptime number?
>
>
>> I am located in Czech Republic.
>>
>
> Cool!  We like wide geographic distribution.
>
>
>> 300 GB is lot of data and I would like to know what's the average/typical
>> network speed on volunteergrid2? I would really like to know the speed
>> regardless you are open or I am fitting candidate.
>
>
> I usually get around 100-110 KBps upload speeds.  My upstream bandwidth is
> about 50 Mbps, so it's Tahoe inefficiency which is the limiting factor, and
> you can probably expect the same.  At that rate, it takes about one month of
> uploading 24x7 to upload 300 GB.
>
> I use some software I wrote that allows me to upload multiple files in
> parallel, which allows Tahoe to make better use of my available bandwidth.
>
> --
> Shawn
>
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