[volunteergrid2-l] Revisiting space contribution caps

[Jody Harris]

Yeah, good points. I'm going to change my meta formula to reflect that.

S = Min Node Size
N = Number Of Nodes
U = Number Of Users
M = Number of nodes owned by user
E = Expansion Factor (7:15 - 2.2)
A = space available per user

Something in the range of:

A = (S * M) / E

Which is actually much cleaner.
----
- Think carefully.


On Thu, Feb 3, 2011 at 9:45 AM, Shawn Willden <shawn at willden.org> wrote:

> On Thu, Feb 3, 2011 at 9:33 AM, Jody Harris <jharris at harrisdev.com> wrote:
>
>> Thus, I think we can safely remove our max-size policy without any impact
>> on the grid. Our concern then shifts to simply monitoring the smallest nodes
>> and making sure those are upgraded to larger drives or removed from the grid
>> as content grows.
>>
>
> If you read the version of the policy that I put on the Wiki, it actually
> doesn't mention a maximum node size, just a maximum consumption level.  I
> didn't write it very clearly, I guess, but my intent is that you are allowed
> to consume min(node_size, 1 TB).  If you have multiple nodes, you take the
> min for each and sum them
>
> sum([ min(size, 1TB) for size in my_node_sizes ])
>
> If you can think of a nice, compact way to write that Python expression in
> English, I'd love to hear it.  It's simple to express in Python, and very
> simple to express in math, but harder to say clearly and concisely in
> English.
>
> However, that doesn't directly address your comment.
>
> Allowing users to use whatever they provide could still get us in trouble
> if we had a user join who wanted to deploy a node with, say 10 TB, and then
> consume 10 TB in the grid.  Since the rest of us probably aren't ready (or
> interested) in upgrading to that level, allowing that person to join the
> grid would create a situation where the grid cannot fulfill that person's
> expectations and attempting to would make the grid useless for the rest of
> us.
>
> Thus, we want a policy that politely makes clear to that person that this
> grid is not the grid he's looking for.
>
> --
> Shawn
>
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