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# Replace a node in subnet io67a

Motivation: 
 - replacing dead node ahekl-ihkqy-u4jqo-5kjvc-ygeuv-ejmin-25kld-7vyop-d6unr-uhlrv-wqe

Calculated potential impact on subnet decentralization if replacing:

- 1 additional node: equal decentralization across all features

Based on the calculated potential impact, not replacing additional nodes to improve optimization.

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 `io67a-2jmkw-zup3h-snbwi-g6a5n-rm5dn-b6png-lvdpl-nqnto-yih6l-gqe`:
```
    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:
- `ahekl-ihkqy-u4jqo-5kjvc-ygeuv-ejmin-25kld-7vyop-d6unr-uhlrv-wqe` [health: dead, impact on decentralization: (gets better) the average log2 of Nakamoto Coefficients across all features increases from 2.2575 to 2.3219]

Nodes added:
- `poyg5-cbmcm-a372x-j72lt-zm4rz-4sf5v-ajtle-hyqkt-rdgaz-eqzmi-5qe` [health: healthy, impact on decentralization: (gets better) the number of different NP actors increases from 12 to 13]


```
    node_provider                                                              data_center            data_center_owner              area                        country        
    -------------                                                              -----------            -----------------              ----                        -------        
    3oqw6-vmpk2-mlwlx-52z5x-e3p7u-fjlcw-yxc34-lf2zq-6ub2f-v63hk-lae  0 -> 1    bc1               1    Africa Data Centres       1    British Columbia       1    AU            1
    64xe5-tx2s3-4gjmj-pnozr-fejw2-77y5y-rhcjk-glnmx-62brf-qin5q-pqe       1    bo1               1    Anonstake                 1    Brussels Capital       1    BE            1
    6nbcy-kprg6-ax3db-kh3cz-7jllk-oceyh-jznhs-riguq-fvk6z-6tsds-rqe       1    br1               1    Cloud9                    1    Cape Town              1    CA            1
    7at4h-nhtvt-a4s55-jigss-wr2ha-ysxkn-e6w7x-7ggnm-qd3d5-ry66r-cae       1    ct1               1    Cyxtera                   1    Florida           1 -> 0    CH            1
    eatbv-nlydd-n655c-g7j7p-gnmpz-pszdg-6e6et-veobv-ftz2y-4m752-vqe       1    hk4               1    DEAC                 0 -> 1    HongKong               1    GE            1
    kos24-5xact-6aror-uofg2-tnvt6-dq3bk-c2c5z-jtptt-jbqvc-lmegy-qae       1    jv1          1 -> 0    Digital Realty            1    Ljubljana              1    HK            1
    lq5ra-f4ibl-t7wpy-hennc-m4eb7-tnfxe-eorgd-onpsl-wervo-7chjj-6qe       1    lj2               1    Equinix                   1    Massachusetts          1    JP            1
    optdi-nwa4m-hly3k-6ua4n-sqyxf-yahvb-wps77-ddayn-r7zcz-edla5-7qe       1    pc1               1    INAP                      1    Panama City            1    LV       0 -> 1
    rbn2y-6vfsb-gv35j-4cyvy-pzbdu-e5aum-jzjg6-5b4n5-vuguf-ycubq-zae       1    rg1          0 -> 1    NEXTDC                    1    Queensland             1    PA            1
    sixix-2nyqd-t2k2v-vlsyz-dssko-ls4hl-hyij4-y7mdp-ja6cj-nsmpf-yae       1    sc1               1    Navegalo                  1    Riga              0 -> 1    SG            1
    spp3m-vawt7-3gyh6-pjz5d-6zidf-up3qb-yte62-otexv-vfpqg-n6awf-lqe  1 -> 0    sg3               1    Nine.Ch                   1    Singapore              1    SI            1
    ucjqj-jmbj3-rs4aq-ekzpw-ltjs3-zrcma-t6r3t-m5wxc-j5yrj-unwoj-mae       1    tb1               1    Racks Central             1    Tbilisi                1    US       2 -> 1
    unqqg-no4b2-vbyad-ytik2-t3vly-3e57q-aje2t-sjb5l-bd4ke-chggn-uqe       1    ty2               1    Tierpoint            1 -> 0    Tokyo                  1    ZA            1
    vegae-c4chr-aetfj-7gzuh-c23sx-u2paz-vmvbn-bcage-pu7lu-mptnn-eqe       1    zh4               1    hkntt                     1    Zurich                 1                   
```



Forum post link: https://forum.dfinity.org/t/subnet-management-io67a-application


Replace a node in subnet io67a