[volunteergrid2-l] Grid problem: uploads failing

[Shawn Willden]

So far, I've been uploading without error for four hours, and as far as I
can tell every single file is going to all 14 nodes, so it appears not to be
the case that a node sometimes refuses or fails to take a share.

On Thu, Oct 20, 2011 at 12:14 PM, Iantcho Vassilev <ianchov at gmail.com>wrote:

> Hmm...Your thesis is interesting.
> Please keep us informed what happened after.
>
> ianchov at gmail.com is accepting new shares..
>
>
> Regards,
> Iantcho
>
>
> On Thu, Oct 20, 2011 at 19:52, Shawn Willden <shawn at willden.org> wrote:
>
>> So... this is interesting.
>>
>> I changed the params to 6/11/11 and was able to upload.
>>
>> Then it occurred to me that if I set shares.total to 14 I could see
>> exactly which servers were accepting shares and, theoretically, identify the
>> three which are not.  So, I set my params to 6/11/14... and what I found was
>> that *all 14 nodes are accepting shares*.  Which is good, but raises the
>> question of why I was getting happiness failures when trying to upload to
>> 12.
>>
>> Then -- and here's the really bizarre part -- I changed my settings to
>> 7/12/14.  So I'm requiring 12 shares to be happy, but trying to push 14.
>>  And all of my uploads are succeeding!  In fact, I'm getting all 14 shares
>> for all of them.
>>
>> I'm going to ask about this on tahoe-dev, but my theory is that it may be
>> a bad idea to set shares.happy == shares.total.  I suspect that tahoe sends
>> out shares.total requests and is happy if shares.happy or more servers
>> respond within some timeout.  This means that if shares.total ==
>> shares.happy, and one of the servers (for whatever reason) is a little slow
>> to respond, the upload fails.
>>
>> Anyway, 7/12/14 is working fine for me.
>>
>> On Thu, Oct 20, 2011 at 10:12 AM, Marco Tedaldi <marco.tedaldi at gmail.com>wrote:
>>
>>> On 20.10.2011 17:11, Shawn Willden wrote:
>>> > Occasional errors due to slow-responding servers I could understand.
>>>  But
>>> > since yesterday afternoon I cannot upload anything with
>>> shares.happy=12.  I
>>> > have a little shell script that attempts to run my backup every 60
>>> seconds
>>> > (until success) and logs failures, and it hasn't been able to upload a
>>> > single file since about 4 PM MST yesterday.
>>> >
>>> Funny thing. I'm uploading my images just fine the whole day. Have stops
>>> with shares happy=12 every few hours, that's true. But I can upload most
>>> of the time.
>>>
>>> And this despite my quite limited upload bandwith (500kbit/s)
>>>
>>>
>>> best
>>>
>>> Marco
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>>
>>
>>
>> --
>> Shawn
>>
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>
>
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-- 
Shawn
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