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Jerry Banfield

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D-QUORUM

# Replace nodes in subnet tdb26

Motivation: The following nodes in subnet `tdb26` have been cordoned and need to be removed from the subnet:
- fd5e4: offboarding BO1 DC after 48 months; https://forum.dfinity.org/t/dfinity-gen-1-servers-available-for-sale-through-silent-auction/36710
- mf3d3: offboarding SG3 DC after 48 months; https://forum.dfinity.org/t/new-node-provider-proposals/16643/581

Decentralization Nakamoto coefficient changes for subnet `tdb26-jop6k-aogll-7ltgs-eruif-6kk7m-qpktf-gdiqx-mxtrf-vb5e6-eqe`:
```
  node_provider: 11.00 -> 11.00    (+0%)
    data_center: 13.00 -> 13.00    (+0%)
data_center_owner: 12.00 -> 11.00    (-8%)
            area: 9.00 -> 10.00   (+11%)
          country: 6.00 -> 6.00    (+0%)
```

**Mean Nakamoto comparison:** 10.83 -> 10.83  (+0%)

Overall replacement impact: (gets better) the average log2 of Nakamoto Coefficients across all features increases from 3.3845 to 3.3889

Impact on business rules penalties: 30 -> 40


# Details

Nodes removed:
- `fd5e4-a2xzl-lxu7m-kjvn6-2arnt-jghro-rdrgx-zvvkd-j2hza-pbwl4-5qe` [health: healthy]
- `mf3d3-z5tww-ii4jn-zhy4f-ah3un-wpre7-edsb4-ktrb5-h7f3f-uz7rv-bqe` [health: healthy]

Nodes added:
- `5gcqu-upr5b-ol3fj-vz273-3ov5j-s2dzp-d3n4o-c3rdz-rnhto-tovcx-zqe` [health: healthy]
- `ufciq-eduab-vwpdh-pfizy-jr6cj-xykuv-i3c64-b2odl-3nii3-b7r5f-jae` [health: healthy]


```
    node_provider                                                              data_center            data_center_owner                                    area                             country        
    -------------                                                              -----------            -----------------                                    ----                             -------        
    3oqw6-vmpk2-mlwlx-52z5x-e3p7u-fjlcw-yxc34-lf2zq-6ub2f-v63hk-lae       1    ar1               1    Africa Data Centres                             1    Barreiro                    1    AR            1
    4dibr-2alzr-h6kva-bvwn2-yqgsl-o577t-od46o-v275p-a2zov-tcw4f-eae       1    ba1               1    Anonstake                                       1    British Columbia            1    AU            1
    4fedi-eu6ue-nd7ts-vnof5-hzg66-hgzl7-liy5n-3otyp-h7ipw-owycg-uae       1    bc1               1    Baltneta                                        1    Brussels Capital            1    BE            1
    4jjya-hlyyc-s766p-fd6gr-d6tvv-vo3ah-j5ptx-i73gw-mwgyd-rw6w2-rae       1    bn1               1    Celeste                                         1    Bucuresti                   1    CA            2
    4r6qy-tljxg-slziw-zoteo-pboxh-vlctz-hkv2d-7zior-u3pxm-mmuxb-cae       1    bo1          1 -> 0    Cloud9                                          1    CABA                        1    CH            3
    6nbcy-kprg6-ax3db-kh3cz-7jllk-oceyh-jznhs-riguq-fvk6z-6tsds-rqe  2 -> 1    br1               1    CyrusOne                                        1    Cape Town                   1    CR            1
    6sq7t-knkul-fko6h-xzvnf-ktbvr-jhx7r-hapzr-kjlek-whugy-zt6ip-xqe       2    bt1               1    Cyxtera                                         1    Colombo                     1    CZ            2
    7at4h-nhtvt-a4s55-jigss-wr2ha-ysxkn-e6w7x-7ggnm-qd3d5-ry66r-cae       1    bu1               1    DataHouse                                       1    Florida                0 -> 1    DE            1
    7ryes-jnj73-bsyu4-lo6h7-lbxk5-x4ien-lylws-5qwzl-hxd5f-xjh3w-mqe       1    cm1               1    Datasite                                   0 -> 1    Gauteng                     2    EE            1
    7uioy-xitfw-yqcko-5gpya-3lpsw-dw7zt-dyyyf-wfqif-jvi76-fdbkg-cqe       1    cr1               1    Digital Realty                             1 -> 2    Geneva                      1    FR            1
    bvcsg-3od6r-jnydw-eysln-aql7w-td5zn-ay5m6-sibd2-jzojt-anwag-mqe  2 -> 3    ct2               1    Equinix                                         2    Hesse                       1    GE            1
    cgmhq-c4zja-yov4u-zeyao-64ua5-idlhb-ezcgr-cultv-3vqjs-dhwo7-rqe       1    fr2               1    Everyware                                       2    HongKong                    2    HK            2
    dhywe-eouw6-hstpj-ahsnw-xnjxq-cmqks-47mrg-nnncb-3sr5d-rac6m-nae       1    ge1               1    HighDC                                          1    Ljubljana                   1    IL            1
    diyay-s4rfq-xnx23-zczwi-nptra-5254n-e4zn6-p7tqe-vqhzr-sd4gd-bqe       1    hk3               1    INAP                                       1 -> 0    London                      1    IN            2
    efem5-kmwaw-xose7-zzhgg-6bfif-twmcw-csg7a-lmqvn-wrdou-mjwlb-vqe       1    hk4               1    InfonetDC                                       1    Maribor                     1    JP            1
    eybf4-6t6bb-unfb2-h2hhn-rrfi2-cd2vs-phksn-jdmbn-i463m-4lzds-vqe       1    hu1               1    Interhost                                       1    Massachusetts          1 -> 0    KR            2
    i3cfo-s2tgu-qe5ym-wk7e6-y7ura-pptgu-kevuf-2feh7-z4enq-5hz4s-mqe       1    jb2               1    KT                                              1    Navi Mumbai                 1    LK            1
    i7dto-bgkj2-xo5dx-cyrb7-zkk5y-q46eh-gz6iq-qkgyc-w4qte-scgtb-6ae       1    jb3               1    Latitude.sh                                     1    Panvel                      1    LT            1
    ivf2y-crxj4-y6ewo-un35q-a7pum-wqmbw-pkepy-d6uew-bfmff-g5yxe-eae       1    kr1               1    Leaseweb                                        1    Paris                       1    LV            1
    izmhk-lpjum-uo4oy-lviba-yctpc-arg4b-2ywim-vgoiu-gqaj2-gskmw-2qe       1    ld1               1    M247                                            1    Praha                       1    PL            1
    kos24-5xact-6aror-uofg2-tnvt6-dq3bk-c2c5z-jtptt-jbqvc-lmegy-qae       1    lj2               1    Master Internet                                 1    Quebec                      1    PT            1
    lq5ra-f4ibl-t7wpy-hennc-m4eb7-tnfxe-eorgd-onpsl-wervo-7chjj-6qe  1 -> 0    mb1               1    MasterDC                                        1    Queensland                  1    RO            1
    mme7u-zxs3z-jq3un-fbaly-nllcz-toct2-l2kp3-larrb-gti4r-u2bmo-dae       1    mtl1              1    Megazone Cloud                                  1    Riga                        1    SE       0 -> 1
    nmdd6-rouxw-55leh-wcbkn-kejit-njvje-p4s6e-v64d3-nlbjb-vipul-mae       1    nm1               1    NEXTDC                                          1    San Jose                    1    SG       2 -> 1
    py2kr-ipr2p-ryh66-x3a3v-5ts6u-7rfhf-alkna-ueffh-hz5ox-lt6du-qqe       1    or1          0 -> 1    Nano                                            1    Seoul                       2    SI            2
    qsdw4-ao5ye-6rtq4-y3zhm-icjbj-lutd2-sbejz-4ajqz-pcflr-xrhsg-jae       1    pa1               1    Navegalo                                        1    Singapore              2 -> 1    UK            1
    r3yjn-kthmg-pfgmb-2fngg-5c7d7-t6kqg-wi37r-j7gy6-iee64-kjdja-jae       1    pl2               1    Online                                          1    South Moravian Region       1    US            3
    rbn2y-6vfsb-gv35j-4cyvy-pzbdu-e5aum-jzjg6-5b4n5-vuguf-ycubq-zae       1    pr1               1    OrionStellar                                    1    Stockholm              0 -> 1    ZA            3
    s5nvr-ipdxf-xg6wd-ofacm-7tl4i-nwjzx-uulum-cugwb-kbpsa-wrsgs-cae       1    rg3               1    Posita.si                                       1    Tallinn                     1                   
    sixix-2nyqd-t2k2v-vlsyz-dssko-ls4hl-hyij4-y7mdp-ja6cj-nsmpf-yae       1    sc1               1    Racks Central                              1 -> 0    Tbilisi                     1                   
    sqhxa-h6ili-qkwup-ohzwn-yofnm-vvnp5-kxdhg-saabw-rvua3-xp325-zqe       1    sg1               1    Rivram                                          1    Tel Aviv                    1                   
    ulyfm-vkxtj-o42dg-e4nam-l4tzf-37wci-ggntw-4ma7y-d267g-ywxi6-iae       1    sg3          1 -> 0    SyT - Servicios y Telecomunicaciones S.A.       1    Texas                       1                   
    unqqg-no4b2-vbyad-ytik2-t3vly-3e57q-aje2t-sjb5l-bd4ke-chggn-uqe       1    sh1          0 -> 1    TRG                                             1    Tokyo                       1                   
    vegae-c4chr-aetfj-7gzuh-c23sx-u2paz-vmvbn-bcage-pu7lu-mptnn-eqe       1    sl1               1    Telin                                           1    Vilnius                     1                   
    wdjjk-blh44-lxm74-ojj43-rvgf4-j5rie-nm6xs-xvnuv-j3ptn-25t4v-6ae       1    st1               1    Teraco                                          1    Virginia                    1                   
    wdnqm-clqti-im5yf-iapio-avjom-kyppl-xuiza-oaz6z-smmts-52wyg-5ae       1    ta1               1    Xneelo                                          1    Warszawa                    1                   
    wwdbq-xuqhf-eydzu-oyl7p-ga565-zm7s7-yrive-ozgsy-zzgh3-qwb3j-cae  0 -> 1    tb1               1    Yotta                                           1    Zurich                      2                   
    zy4m7-z5mhs-zfkpl-zlsjl-blrbx-mvvmq-5z4zu-mf7eq-hhv7o-ezfro-3ae       1    tv1               1    hkcolo                                          1                                                    
                                                                               ty3               1    hkntt                                           1                                                    
                                                                               wa3               1                                                                                                         
                                                                               zh2               2                                                                                                         
```


Business rules check results *before* the membership change:
- node_provider 6nbcy-kprg6-ax3db-kh3cz-7jllk-oceyh-jznhs-riguq-fvk6z-6tsds-rqe controls 2 of nodes, which is higher than target of 1 for the subnet. Applying penalty of 10.
- data_center zh2 controls 2 of nodes, which is higher than target of 1 for the subnet. Applying penalty of 10.
- data_center_owner Equinix controls 2 of nodes, which is higher than target of 1 for the subnet. Applying penalty of 10.


Business rules check results *after* the membership change:
- node_provider bvcsg-3od6r-jnydw-eysln-aql7w-td5zn-ay5m6-sibd2-jzojt-anwag-mqe controls 3 of nodes, which is higher than target of 1 for the subnet. Applying penalty of 20.
- data_center zh2 controls 2 of nodes, which is higher than target of 1 for the subnet. Applying penalty of 10.
- data_center_owner Digital Realty controls 2 of nodes, which is higher than target of 1 for the subnet. Applying penalty of 10.


Forum post link: https://forum.dfinity.org/t/subnet-management-tdb26-nns/33663/54


Replace nodes in subnet tdb26