Change The Validators In Your Quorum Slice

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Every Stellar validator needs a quorum slice* associated to it 

After the node is launched, the validator has the ability to go into the node's settings and view the quorum slice, and change the nodes in the quorum.

Node Settings

Users can go to the node settings by selecting the Actions menu on the Overview pane node's table.
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Which will give you a page for editing your validators.

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*Quorum Slices: Stellar Consensus Protocol uses the concept of quorums and quorum slices. Quorum is a set of nodes sufficient to reach agreement. A quorum slice is a subset of a quorum that can convince one particular node about agreement. An individual node can appear on multiple quorum slices. Stellar introduces quorum slices to allow each individual node to choose a set of nodes within its slice thereby allowing open participation. These quorum slices and quorums are based on real-life business relationships between various entities thereby leveraging trust that already exists in business models. To reach global consensus in the entire systems, quorums have to intersect. The overall consensus is reached globally from decisions made by individual nodes. The consensus protocol works as follows.

  • Each node first performs initial voting on transactions, also generically considered as statements. This is the first step of the federated voting process. Each node performs its selection of statements and will never vote for another statement contradicting its selection.

It can, however, accept a different statement if its quorum slice has accepted a different one.

  • The second step is the acceptance step. A node accepts a statement if it has never accepted a statement contradicting the current statement and each node in its v-blocking set has accepted that statement. A v-blocking set is a set of nodes one each from a quorum slice to which the current node belongs to. Quorum slices influence one another leading to quorums that agree on certain statements. This step is known as ratification when all members of a quorum agree on a statement.
  • Confirmation is the final step of the voting process and signifies system level agreement. This step ensures that nodes send each other confirmation messages so that all agree upon the final value of the state in the system
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