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use std::sync::Arc;
use garage_rpc::membership::System;
use garage_rpc::ring::Ring;
use garage_util::data::*;
use crate::replication::*;
#[derive(Clone)]
pub struct TableFullReplication {
pub max_faults: usize,
}
#[derive(Clone)]
struct Neighbors {
ring: Arc<Ring>,
neighbors: Vec<UUID>,
}
impl TableFullReplication {
pub fn new(max_faults: usize) -> Self {
TableFullReplication { max_faults }
}
}
impl TableReplication for TableFullReplication {
// Full replication schema: all nodes store everything
// Writes are disseminated in an epidemic manner in the network
// Advantage: do all reads locally, extremely fast
// Inconvenient: only suitable to reasonably small tables
fn read_nodes(&self, _hash: &Hash, system: &System) -> Vec<UUID> {
vec![system.id]
}
fn read_quorum(&self) -> usize {
1
}
fn write_nodes(&self, hash: &Hash, system: &System) -> Vec<UUID> {
self.replication_nodes(hash, system.ring.borrow().as_ref())
}
fn write_quorum(&self, system: &System) -> usize {
system.ring.borrow().config.members.len() - self.max_faults
}
fn max_write_errors(&self) -> usize {
self.max_faults
}
fn replication_nodes(&self, _hash: &Hash, ring: &Ring) -> Vec<UUID> {
ring.config.members.keys().cloned().collect::<Vec<_>>()
}
fn split_points(&self, _ring: &Ring) -> Vec<Hash> {
let mut ret = vec![];
ret.push([0u8; 32].into());
ret
}
}
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