52 lines
1.2 KiB
Rust
52 lines
1.2 KiB
Rust
use std::sync::Arc;
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use garage_rpc::membership::System;
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use garage_rpc::ring::*;
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use garage_util::data::*;
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use crate::replication::*;
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#[derive(Clone)]
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pub struct TableFullReplication {
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pub system: Arc<System>,
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pub max_faults: usize,
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}
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impl TableReplication for TableFullReplication {
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// Full replication schema: all nodes store everything
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// Writes are disseminated in an epidemic manner in the network
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// Advantage: do all reads locally, extremely fast
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// Inconvenient: only suitable to reasonably small tables
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fn read_nodes(&self, _hash: &Hash) -> Vec<UUID> {
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vec![self.system.id]
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}
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fn read_quorum(&self) -> usize {
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1
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}
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fn write_nodes(&self, _hash: &Hash) -> Vec<UUID> {
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let ring = self.system.ring.borrow();
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ring.config.members.keys().cloned().collect::<Vec<_>>()
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}
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fn write_quorum(&self) -> usize {
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let nmembers = self.system.ring.borrow().config.members.len();
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if nmembers > self.max_faults {
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nmembers - self.max_faults
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} else {
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1
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}
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}
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fn max_write_errors(&self) -> usize {
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self.max_faults
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}
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fn partition_of(&self, _hash: &Hash) -> Partition {
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0u16
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}
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fn partitions(&self) -> Vec<(Partition, Hash)> {
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vec![(0u16, [0u8; 32].into())]
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}
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}
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