Proposal 137126 Observations | LORIMER 
VOTE: Pending… NO
Thanks @alexu, before I vote on this I’d like to make sure I understand the situation completely. I think there are aspects that haven’t been made as clear as they could be.
I’ve diffed the proposed IC Target Topology table with the existing one (red deletions and green additions highlighted below).
| Subnet Type | # Subnets | # Nodes in subnet | Total | SEV | Subnet limit NP, DC, DC Provider* | Subnet limit country |
|---|---|---|---|---|---|---|
| NNS | 1 | 43 | 43 | no | 1 (with exception for DFINITY nodes) | 3 |
| SNS | 1 | 34 | 34 | no | 1 | 3 |
| Fiduciary | 1 | no | 1 | 3 | ||
| Internet Identity | 1 | yes | 1 | 3 | ||
| ECDSA signing | 1 | 28 | 28 | yes | 1 | 3 |
| ECDSA backup | 1 | 28 | 28 | yes | 1 | 3 |
| Bitcoin canister | 1 | 13 | 13 | no | 1 | 2 |
| European subnet | 1 | 13 | 13 | yes | 1 | 2 |
| Swiss subnet | 1 | 13 | 13 | yes | 1 | 13 |
| US subnet (NEW) | 1 | 13 | 13 | yes | 1 | 13 |
| Application subnet (NEW) | 13 | no | 1 | 2 | ||
| Total |
A point that is not made clear is that the number of nodes in the Fiduciary and Internet Identity subnets are proposed to be reduced. This hasn’t been mentioned (other than by the figures in the table). Could you elaborate on this aspect?
For voters reading this, here’s the context for why the Fiduciary and Internet Identity subnets were expanded to 34 nodes → Adjustment of IC Target Topology to Increase Subnet Size of Fiduciary and II subnets - Governance - Internet Computer Developer Forum
This proposal proposes to shrink them back to 28 nodes. I think this deserves some discussion.
I also noticed that the total count of nodes is 2 less than last time.
My understanding is that there are 1425 replica nodes currently onboarded on the IC (or 1445 if you include boundary nodes). Am I correct in understanding this means there are 404 ‘reserve nodes’ (if you just count replica nodes)?
Can I ask why reserve nodes were omitted from the table this time around? Have I misunderstood the purpose that those two removed rows served?
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