Validator Set limitation  

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Rholand
(@roland)
Active Member
Joined:7 months  ago
Posts: 12
14/06/2018 8:50 am  

As far as I understand the Validator Set must be limited to a few thousands because otherwise the voting would take too long. Is this assumption correct? If yes how are the validators choosen over time? 


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MichaelBirch
(@michaelbirch)
Member Moderator
Joined:9 months  ago
Posts: 42
14/06/2018 2:02 pm  

Certainly there is additional network overhead and longer times to finality the more validators there are. What exactly a good practical limit is will need to be determined using data, but order thousands probably isn't a bad guess.

There are a variety of factors that determine what validators there are and how many there are. Failing to follow the protocol gets you slashed and failing to meet performance requirements gets you ejected, both of which decrease the number of validators. On the other hand bonding adds new validators and we are considering adding some economic pressures to regulate bonding.

Overall, how these things balance out will be something we need to measure and tweak to get right.


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