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use garage_rpc::layout::*;
use garage_util::data::*;
/// Trait to describe how a table shall be replicated
pub trait TableReplication: Send + Sync + 'static {
type WriteSets: AsRef<Vec<Vec<Uuid>>> + Send + Sync + 'static;
// See examples in table_sharded.rs and table_fullcopy.rs
// To understand various replication methods
/// The entire list of all nodes that store a partition
fn storage_nodes(&self, hash: &Hash) -> Vec<Uuid>;
/// Which nodes to send read requests to
fn read_nodes(&self, hash: &Hash) -> Vec<Uuid>;
/// Responses needed to consider a read succesfull
fn read_quorum(&self) -> usize;
/// Which nodes to send writes to
fn write_sets(&self, hash: &Hash) -> Self::WriteSets;
/// Responses needed to consider a write succesfull in each set
fn write_quorum(&self) -> usize;
fn max_write_errors(&self) -> usize;
// Accessing partitions, for Merkle tree & sync
/// Get partition for data with given hash
fn partition_of(&self, hash: &Hash) -> Partition;
/// List of partitions and nodes to sync with in current layout
fn sync_partitions(&self) -> SyncPartitions;
}
#[derive(Debug)]
pub struct SyncPartitions {
pub layout_version: u64,
pub partitions: Vec<SyncPartition>,
}
#[derive(Debug)]
pub struct SyncPartition {
pub partition: Partition,
pub first_hash: Hash,
pub last_hash: Hash,
pub storage_nodes: Vec<Uuid>,
}
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