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-rw-r--r--src/table/table_fullcopy.rs60
1 files changed, 8 insertions, 52 deletions
diff --git a/src/table/table_fullcopy.rs b/src/table/table_fullcopy.rs
index 5dd0ebb1..c55879d8 100644
--- a/src/table/table_fullcopy.rs
+++ b/src/table/table_fullcopy.rs
@@ -1,4 +1,3 @@
-use arc_swap::ArcSwapOption;
use std::sync::Arc;
use garage_rpc::membership::System;
@@ -9,10 +8,7 @@ use crate::*;
#[derive(Clone)]
pub struct TableFullReplication {
- pub write_factor: usize,
- pub write_quorum: usize,
-
- neighbors: ArcSwapOption<Neighbors>,
+ pub max_faults: usize,
}
#[derive(Clone)]
@@ -22,45 +18,8 @@ struct Neighbors {
}
impl TableFullReplication {
- pub fn new(write_factor: usize, write_quorum: usize) -> Self {
- TableFullReplication {
- write_factor,
- write_quorum,
- neighbors: ArcSwapOption::from(None),
- }
- }
-
- fn get_neighbors(&self, system: &System) -> Vec<UUID> {
- let neighbors = self.neighbors.load_full();
- if let Some(n) = neighbors {
- if Arc::ptr_eq(&n.ring, &system.ring.borrow()) {
- return n.neighbors.clone();
- }
- }
-
- // Recalculate neighbors
- let ring = system.ring.borrow().clone();
- let my_id = system.id;
-
- let mut nodes = vec![];
- for (node, _) in ring.config.members.iter() {
- let node_ranking = fasthash(&[node.as_slice(), my_id.as_slice()].concat());
- nodes.push((*node, node_ranking));
- }
- nodes.sort_by(|(_, rank1), (_, rank2)| rank1.cmp(rank2));
- let mut neighbors = nodes
- .drain(..)
- .map(|(node, _)| node)
- .filter(|node| *node != my_id)
- .take(self.write_factor)
- .collect::<Vec<_>>();
-
- neighbors.push(my_id);
- self.neighbors.swap(Some(Arc::new(Neighbors {
- ring,
- neighbors: neighbors.clone(),
- })));
- neighbors
+ pub fn new(max_faults: usize) -> Self {
+ TableFullReplication { max_faults }
}
}
@@ -78,17 +37,14 @@ impl TableReplication for TableFullReplication {
1
}
- fn write_nodes(&self, _hash: &Hash, system: &System) -> Vec<UUID> {
- self.get_neighbors(system)
+ fn write_nodes(&self, hash: &Hash, system: &System) -> Vec<UUID> {
+ self.replication_nodes(hash, system.ring.borrow().as_ref())
}
- fn write_quorum(&self) -> usize {
- self.write_quorum
+ fn write_quorum(&self, system: &System) -> usize {
+ system.ring.borrow().config.members.len() - self.max_faults
}
fn max_write_errors(&self) -> usize {
- self.write_factor - self.write_quorum
- }
- fn epidemic_writes(&self) -> bool {
- true
+ self.max_faults
}
fn replication_nodes(&self, _hash: &Hash, ring: &Ring) -> Vec<UUID> {