65 lines
1.3 KiB
Rust
65 lines
1.3 KiB
Rust
#[derive(Clone, Copy)]
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pub enum ReplicationMode {
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None,
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TwoWay,
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TwoWayDangerous,
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ThreeWay,
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ThreeWayDegraded,
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ThreeWayDangerous,
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}
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impl ReplicationMode {
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pub fn parse(v: &str) -> Option<Self> {
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match v {
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"none" | "1" => Some(Self::None),
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"2" => Some(Self::TwoWay),
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"2-dangerous" => Some(Self::TwoWayDangerous),
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"3" => Some(Self::ThreeWay),
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"3-degraded" => Some(Self::ThreeWayDegraded),
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"3-dangerous" => Some(Self::ThreeWayDangerous),
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_ => None,
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}
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}
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pub fn control_write_max_faults(&self) -> usize {
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match self {
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Self::None => 0,
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_ => 1,
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}
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}
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pub fn replication_factor(&self) -> usize {
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match self {
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Self::None => 1,
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Self::TwoWay | Self::TwoWayDangerous => 2,
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Self::ThreeWay | Self::ThreeWayDegraded | Self::ThreeWayDangerous => 3,
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}
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}
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pub fn read_quorum(&self) -> usize {
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match self {
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Self::None => 1,
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Self::TwoWay | Self::TwoWayDangerous => 1,
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Self::ThreeWay => 2,
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Self::ThreeWayDegraded | Self::ThreeWayDangerous => 1,
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}
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}
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pub fn write_quorum(&self) -> usize {
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match self {
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Self::None => 1,
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Self::TwoWay => 2,
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Self::TwoWayDangerous => 1,
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Self::ThreeWay | Self::ThreeWayDegraded => 2,
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Self::ThreeWayDangerous => 1,
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}
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}
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pub fn is_read_after_write_consistent(&self) -> bool {
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match self {
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Self::None | Self::TwoWay | Self::ThreeWay => true,
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_ => false,
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}
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}
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}
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