I’ve been unable to comment on a lot of the recent activity in this thread but it’s really fascinating.
It’s hard to reason about the security model without a clear understanding of safecoin and how it will affect vault behaviour / incentives. Will it be better to have many small vaults or a few large ones or somewhere in between? Can’t know until safecoin algorithm is clearly defined.
The design of security and incentives seems to come down to how ‘health’ of the network is defined and measured. I don’t feel health is clear (at least not to me) and thus the design work here and elsewhere is not as well directed as it could be. The existing work is a very interesting exploration and learning, but eventually it must become directed and measurable.
I’ve been working on a spreadsheet of measurable metrics for network health (see this spreadsheet, comments welcome). Maybe it’s not so helpful, I don’t know, but hopefully it can clarify what the targets are rather than some abstract idea of ‘optimum’.
Network Health is defined as ‘the ability to securely store and deliver data’.
These metrics determine how well or poorly the network has ‘the ability to securely store and deliver data’.
Health is an ongoing assessment to correlate real-world actions with desired consequences.
Section Prefix Length Similarity
Chunk Distribution Variation
New Vault Rejection Rate
New Vault Acceptance Rate
Unexpected Departure Rate
Expected Departure Rate
Vault Age Distribution
Section Farm Rate Similarity
Section Vault Count Similarity
Age Distribution of Unexpected Departures
Safecoin Allocation Rate
Total Vault Count
Eventually the goal is to have a monitoring program that can measure these aspects of the network and alert if poor health is detected and maybe trigger human (ie vault operator) intervention.