[volunteergrid2-l] Failure Analysis

[Jody Harris]

Okay, a rough draft is up:
http://bigpig.org/twiki/bin/view/Main/FailureAnalysisOverview

<http://bigpig.org/twiki/bin/view/Main/FailureAnalysisOverview>Have at it.
----
- Think carefully.


On Wed, Feb 2, 2011 at 10:38 AM, Shawn Willden <shawn at willden.org> wrote:

> On Wed, Feb 2, 2011 at 10:31 AM, Jody Harris <jharris at harrisdev.com>wrote:
>
>> All failure analysis should be in a single document per node, with
>> "overlapping failure" links between nodes. Once we start getting a handle on
>> the grid and the failures, we will be aware of having too many nodes under
>> single failure points.
>>
>
> Very cool.  If you look at my Tahoe-LAFS reliability modeling paper, you'll
> see I've described how to compute reliability estimates that accurately
> incorporate both overlapping and non-overlapping failure modes.  At bottom
> it's all really very simple.  If you can identify the failure modes, and
> then assign probabilities to each (hard to do accurately, but I think we can
> take some reasonable SWAGs), then you can model each individual failure with
> a trivial probability mass function and combine those PMFs in fairly
> straightforward ways to build up an overall reliability estimate for your
> files.
>
> --
> Shawn
>
> _______________________________________________
> volunteergrid2-l mailing list
> volunteergrid2-l at tahoe-lafs.org
> http://tahoe-lafs.org/cgi-bin/mailman/listinfo/volunteergrid2-l
> http://bigpig.org/twiki/bin/view/Main/WebHome
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://tahoe-lafs.org/cgi-bin/mailman/private/volunteergrid2-l/attachments/20110202/be40e373/attachment.html>