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layout version: refactor get_node_zone

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Alex Auvolat 2023-12-08 11:50:58 +01:00
parent 7f2541101f
commit 063294dd56
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GPG key ID: 0E496D15096376BE
2 changed files with 25 additions and 26 deletions
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4
src/rpc/layout/test.rs
View file

@ -34,8 +34,8 @@ fn check_against_naive(cl: &LayoutVersion) -> Result<bool, Error> {
zone_token.insert(z.clone(), 0);
}
for uuid in cl.nongateway_nodes() {
let z = cl.get_node_zone(&uuid)?;
let c = cl.get_node_capacity(&uuid).unwrap();
let z = cl.expect_get_node_zone(&uuid);
let c = cl.expect_get_node_capacity(&uuid);
zone_token.insert(
z.to_string(),
zone_token[z] + min(NB_PARTITIONS, (c / over_size) as usize),

47
src/rpc/layout/version.rs
View file

@ -70,6 +70,14 @@ impl LayoutVersion {
}
}
/// Given a node uuids, this function returns the label of its zone if it has one
pub fn get_node_zone(&self, uuid: &Uuid) -> Option<&str> {
match self.node_role(uuid) {
Some(role) => Some(&role.zone),
_ => None,
}
}
/// Returns the number of partitions associated to this node in the ring
pub fn get_node_usage(&self, uuid: &Uuid) -> Result<usize, Error> {
for (i, id) in self.node_id_vec.iter().enumerate() {
@ -129,28 +137,22 @@ impl LayoutVersion {
// ===================== internal information extractors ======================
/// Given a node uuids, this function returns the label of its zone
pub(crate) fn get_node_zone(&self, uuid: &Uuid) -> Result<&str, Error> {
match self.node_role(uuid) {
Some(role) => Ok(&role.zone),
_ => Err(Error::Message(
"The Uuid does not correspond to a node present in the cluster.".into(),
)),
}
}
fn expect_get_node_capacity(&self, uuid: &Uuid) -> u64 {
pub(crate) fn expect_get_node_capacity(&self, uuid: &Uuid) -> u64 {
self.get_node_capacity(&uuid)
.expect("non-gateway node with zero capacity")
}
pub(crate) fn expect_get_node_zone(&self, uuid: &Uuid) -> &str {
self.get_node_zone(&uuid).expect("node without a zone")
}
/// Returns the sum of capacities of non gateway nodes in the cluster
fn get_total_capacity(&self) -> Result<u64, Error> {
fn get_total_capacity(&self) -> u64 {
let mut total_capacity = 0;
for uuid in self.nongateway_nodes() {
total_capacity += self.expect_get_node_capacity(&uuid);
}
Ok(total_capacity)
total_capacity
}
/// Returns the effective value of the zone_redundancy parameter
@ -227,10 +229,7 @@ impl LayoutVersion {
// Check that every partition is spread over at least zone_redundancy zones.
let zones_of_p = nodes_of_p
.iter()
.map(|n| {
self.get_node_zone(&self.node_id_vec[*n as usize])
.expect("Zone not found.")
})
.map(|n| self.expect_get_node_zone(&self.node_id_vec[*n as usize]))
.collect::<Vec<_>>();
if zones_of_p.iter().unique().count() < zone_redundancy {
return Err(format!(
@ -516,7 +515,7 @@ impl LayoutVersion {
}
let mut s_down = 1;
let mut s_up = self.get_total_capacity()?;
let mut s_up = self.get_total_capacity();
while s_down + 1 < s_up {
g = self.generate_flow_graph(
(s_down + s_up) / 2,
@ -586,7 +585,7 @@ impl LayoutVersion {
}
for n in 0..self.nongateway_nodes().len() {
let node_capacity = self.expect_get_node_capacity(&self.node_id_vec[n]);
let node_zone = zone_to_id[self.get_node_zone(&self.node_id_vec[n])?];
let node_zone = zone_to_id[self.expect_get_node_zone(&self.node_id_vec[n])];
g.add_edge(Vertex::N(n), Vertex::Sink, node_capacity / partition_size)?;
for p in 0..NB_PARTITIONS {
if !exclude_assoc.contains(&(p, n)) {
@ -632,7 +631,7 @@ impl LayoutVersion {
// The algorithm is such that it will start with the flow that we just computed
// and find ameliorating paths from that.
for (p, n) in exclude_edge.iter() {
let node_zone = zone_to_id[self.get_node_zone(&self.node_id_vec[*n])?];
let node_zone = zone_to_id[self.expect_get_node_zone(&self.node_id_vec[*n])];
g.add_edge(Vertex::PZ(*p, node_zone), Vertex::N(*n), 1)?;
}
g.compute_maximal_flow()?;
@ -652,7 +651,7 @@ impl LayoutVersion {
let mut cost = CostFunction::new();
for (p, assoc_p) in prev_assign.iter().enumerate() {
for n in assoc_p.iter() {
let node_zone = zone_to_id[self.get_node_zone(&self.node_id_vec[*n])?];
let node_zone = zone_to_id[self.expect_get_node_zone(&self.node_id_vec[*n])];
cost.insert((Vertex::PZ(p, node_zone), Vertex::N(*n)), -1);
}
}
@ -707,7 +706,7 @@ impl LayoutVersion {
let mut msg = Message::new();
let used_cap = self.partition_size * NB_PARTITIONS as u64 * self.replication_factor as u64;
let total_cap = self.get_total_capacity()?;
let total_cap = self.get_total_capacity();
let percent_cap = 100.0 * (used_cap as f32) / (total_cap as f32);
msg.push(format!(
"Usable capacity / total cluster capacity: {} / {} ({:.1} %)",
@ -754,7 +753,7 @@ impl LayoutVersion {
let mut old_zones_of_p = Vec::<usize>::new();
for n in prev_assign[p].iter() {
old_zones_of_p
.push(zone_to_id[self.get_node_zone(&self.node_id_vec[*n])?]);
.push(zone_to_id[self.expect_get_node_zone(&self.node_id_vec[*n])]);
}
if !old_zones_of_p.contains(&z) {
new_partitions_zone[z] += 1;
@ -796,7 +795,7 @@ impl LayoutVersion {
for z in 0..id_to_zone.len() {
let mut nodes_of_z = Vec::<usize>::new();
for n in 0..storing_nodes.len() {
if self.get_node_zone(&self.node_id_vec[n])? == id_to_zone[z] {
if self.expect_get_node_zone(&self.node_id_vec[n]) == id_to_zone[z] {
nodes_of_z.push(n);
}
}