DFINITY Foundation

Internet Computer Association

Synapse.vote (original)

Arthur’s Neuron (used to be cycle_dao)

ICDevs.org

CryptoIsGood

Anvil

ICPL.app

Inactive (Request Removal) - The Fools' Court

ysyms

The Accumulators’ Neuron

RawTech Venture

Paul Young

ICPMANUAL

8yeargangDAO

John Wiegley

Isaac Valadez

Krzysztof Żelazko

Always Rejects

Nicolas.ic

Smaug’s Neuron for Retail Investors

ICLight.io

Synapse.vote (NEW)

Taggr Network

CodeGov

Sonic AMM

Rakeoff.io

$STACK

OpenChat

ELNA AI

GEEKFACTORY

ICP Hub México

ICP Hub Poland

Jerry Banfield

WaterNeuron

ICP Hub Bulgaria

Gold DAO

NeuronPool

LORIMER

B3Pay

ZenithCode

Aviate Labs

D-QUORUM

# Replace nodes in subnet nl6hn

Motivation: 
 - replacing dead node nebck-zsvl3-ihtov-dgrji-q7xly-qhbwu-53rao-7ysgi-x7aof-wgvna-eae
 - replacing node ptxxp-fechw-m6taf-lrkaj-hwtas-rxq6p-o6tko-yho6t-cjfzc-zkgdd-sae to optimize network topology

Calculated potential impact on subnet decentralization if replacing:

- 1 additional node would result in: (gets better) the average log2 of Nakamoto Coefficients across all features increases from 2.2575 to 2.3219

Based on the calculated potential impact, replacing 1 additional nodes to improve optimization

Note: the heuristic for node replacement relies not only on the Nakamoto coefficient but also on other factors that iteratively optimize network topology.
Due to this, Nakamoto coefficients may not directly increase in every node replacement proposal.
Code for comparing decentralization of two candidate subnet topologies is at:
https://github.com/dfinity/dre/blob/79066127f58c852eaf4adda11610e815a426878c/rs/decentralization/src/nakamoto/mod.rs#L342

Note: the information below is provided for your convenience. Please independently verify the decentralization changes rather than relying solely on this summary.
Here is [an explaination of how decentralization is currently calculated](https://dfinity.github.io/dre/decentralization.html), 
and there are also [instructions for performing what-if analysis](https://dfinity.github.io/dre/subnet-decentralization-whatif.html) if you are wondering if another node would have improved decentralization more.



Decentralization Nakamoto coefficient changes for subnet `nl6hn-ja4yw-wvmpy-3z2jx-ymc34-pisx3-3cp5z-3oj4a-qzzny-jbsv3-4qe`:
```
    node_provider: 5.00 -> 5.00    (+0%)
      data_center: 5.00 -> 5.00    (+0%)
data_center_owner: 5.00 -> 5.00    (+0%)
             area: 5.00 -> 5.00    (+0%)
          country: 4.00 -> 5.00   (+25%)
```

**Mean Nakamoto comparison:** 4.80 -> 5.00  (+4%)

Overall replacement impact: (gets better) the average log2 of Nakamoto Coefficients across all features increases from 2.2575 to 2.3219


# Details

Nodes removed:
- `nebck-zsvl3-ihtov-dgrji-q7xly-qhbwu-53rao-7ysgi-x7aof-wgvna-eae` [health: dead]
- `ptxxp-fechw-m6taf-lrkaj-hwtas-rxq6p-o6tko-yho6t-cjfzc-zkgdd-sae` [health: healthy]

Nodes added:
- `lz3ap-rjo2a-ilqjt-jkyhb-t4ewt-b37eu-gl246-ltnyu-jrkec-6bi5m-cqe` [health: healthy]
- `fwpkp-tbgp3-rhl4h-njm2i-ebtn2-5susq-o765o-hjop2-qktc7-uo2kf-xae` [health: healthy]


```
    node_provider                                                              data_center            data_center_owner            area                     country        
    -------------                                                              -----------            -----------------            ----                     -------        
    4dibr-2alzr-h6kva-bvwn2-yqgsl-o577t-od46o-v275p-a2zov-tcw4f-eae  0 -> 1    an1               1    Cloud9             0 -> 1    Flanders            1    AU            1
    64xe5-tx2s3-4gjmj-pnozr-fejw2-77y5y-rhcjk-glnmx-62brf-qin5q-pqe  1 -> 0    fr2               1    Cyxtera                 1    Florida             1    BE            1
    6nbcy-kprg6-ax3db-kh3cz-7jllk-oceyh-jznhs-riguq-fvk6z-6tsds-rqe       1    ge2               1    Datacenter United       1    Geneva              1    CA            1
    7at4h-nhtvt-a4s55-jigss-wr2ha-ysxkn-e6w7x-7ggnm-qd3d5-ry66r-cae       1    gn1               1    Digital Realty          1    Greater Noida       1    CH       2 -> 1
    7ryes-jnj73-bsyu4-lo6h7-lbxk5-x4ien-lylws-5qwzl-hxd5f-xjh3w-mqe       1    hk4               1    Equinix                 1    Hesse               1    DE            1
    bvcsg-3od6r-jnydw-eysln-aql7w-td5zn-ay5m6-sibd2-jzojt-anwag-mqe       1    jv1               1    Gasan              1 -> 0    HongKong            1    GE       0 -> 1
    cgmhq-c4zja-yov4u-zeyao-64ua5-idlhb-ezcgr-cultv-3vqjs-dhwo7-rqe       1    kr2          1 -> 0    Megazone Cloud     0 -> 1    Ljubljana           1    HK            1
    cp5ib-twnmx-h4dvd-isef2-tu44u-kb2ka-fise5-m4hta-hnxoq-k45mm-hqe       1    lj1               1    NEXTDC                  1    Melbourne           1    IN            1
    ihbuj-erwnc-tkjux-tqtnv-zkoar-uniy2-sk2go-xfpkc-znbb4-seukm-wqe       1    mn2               1    Nine.Ch            1 -> 0    Ontario             1    KR            1
    rbn2y-6vfsb-gv35j-4cyvy-pzbdu-e5aum-jzjg6-5b4n5-vuguf-ycubq-zae       1    sg1               1    Posita.si               1    Seoul               1    SE            1
    spp3m-vawt7-3gyh6-pjz5d-6zidf-up3qb-yte62-otexv-vfpqg-n6awf-lqe       1    sh1               1    SafeHost                1    Singapore           1    SG            1
    ucjqj-jmbj3-rs4aq-ekzpw-ltjs3-zrcma-t6r3t-m5wxc-j5yrj-unwoj-mae  1 -> 0    sl1          0 -> 1    Telin                   1    Stockholm           1    SI            1
    vegae-c4chr-aetfj-7gzuh-c23sx-u2paz-vmvbn-bcage-pu7lu-mptnn-eqe  0 -> 1    tb1          0 -> 1    Tierpoint               1    Tbilisi        0 -> 1    US            1
    wdjjk-blh44-lxm74-ojj43-rvgf4-j5rie-nm6xs-xvnuv-j3ptn-25t4v-6ae       1    to1               1    Yotta                   1    Zurich         1 -> 0                   
    wdnqm-clqti-im5yf-iapio-avjom-kyppl-xuiza-oaz6z-smmts-52wyg-5ae       1    zh4          1 -> 0    hkntt                   1                                            
```


Forum post link: https://forum.dfinity.org/t/subnet-management-nl6hn-application/33659/13


Replace nodes in subnet nl6hn