[volunteergrid2-l] Recommended settings

[Shawn Willden]

On Wed, Jun 29, 2011 at 7:41 AM, Marco Tedaldi <marco.tedaldi at gmail.com>wrote:

> Just one thought on the settings:
>
> Setting N to the number of nodes might not be the best idea anyway. At
> least if this node also provides storage. I think, there is not much sense
> in putting my data on my own node.
>

Setting N to T-1 (I'm going to use T to mean "total number of nodes" will
not prevent your node from getting a share.  Server selection is basically
randomized so if all nodes in the grid are performing well, and T=10 and
N=9, your node will get one of your shares 90% of the time.  If some of the
nodes in the grid are slow to respond, your node will get one of your shares
*more* than 90% of the time.

For the backup use case this behavior isn't ideal.  But for a lot of other
use cases it makes a great deal of sense.


> Setting the values automatically has some benefits. But there would have to
> be quite some code behind it. Imagine a network with 50 nodes or more...
> Setting "shares.total" to 48 would not make too much sense in my oppinion.
>

Why not?


> Also automatically generating the config options does not seem too sensible
> to me, since the should change dynamically at runtime (especially in bigger
> and more volatile grids).
>

Right, my goal would be to calculate the N and K values dynamically, for
every upload.

-- 
Shawn
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