Enum DurabilityTier 

pub enum DurabilityTier {
    None,
    Snapshot,
    Dedup,
    Stream,
}

A workload’s declared durability tier — where a second copy of its state lives, and how far behind that copy is allowed to be (R850-P4).

The three non-None variants name turso-backup’s three implemented tiers. They are spelled here rather than imported because workload-spec is a leaf crate every fleet node links and turso-backup is a service-side dependency; the coupling that matters is the vocabulary, not the types.

Variants

None

Deliberately no second copy. State lives only where the container runs and is gone when that node is. Legitimate for caches and scratch — and it is a statement, which is why it is not the same as declaring nothing (see WorkloadSpec::durability).

Snapshot

turso-backup tier 1a — periodic full VACUUM INTO snapshot to the object store. Recovery point is the last snapshot, so the loss window is the snapshot interval, which this declaration does not carry: a snapshot-tier workload’s RPO is whatever schedules it.

Dedup

turso-backup tier 1b — incremental page-dedup snapshot. Same recovery point semantics as Self::Snapshot; cheaper per run, so in practice a shorter interval.

Stream

turso-backup tier 2 — WAL-frame streaming with restore by frame replay. The only tier with a bounded, declarable loss window; see Durability::rpo_seconds and turso_backup::stream::DEFAULT_RPO_TARGET (120 s), which is what an undeclared RPO means in practice.

Implementations

impl DurabilityTier

pub fn as_str(&self) -> &'static str

The wire/TOML spelling, so a diagnostic and the file it points at agree.

pub fn ships_bytes(&self) -> bool

Whether this tier puts bytes in an object store — i.e. whether there is a copy to hydrate from after the node is gone.

Trait Implementations

impl Clone for DurabilityTier

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for DurabilityTier

impl Debug for DurabilityTier

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DurabilityTier

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for DurabilityTier

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for DurabilityTier

impl PartialEq for DurabilityTier

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for DurabilityTier

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for DurabilityTier

impl TS for DurabilityTier

type WithoutGenerics = DurabilityTier

If this type does not have generic parameters, then WithoutGenerics should just be Self. If the type does have generic parameters, then all generic parameters must be replaced with a dummy type, e.g ts_rs::Dummy or ().
The only requirement for these dummy types is that EXPORT_TO must be None.

type OptionInnerType = DurabilityTier

If the implementing type is std::option::Option<T>, then this associated type is set to T. All other implementations of TS should set this type to Self instead.

fn ident(cfg: &Config) -> String

Identifier of this type, excluding generic parameters.

fn docs() -> Option<String>

JSDoc comment to describe this type in TypeScript - when TS is derived, docs are automatically read from your doc comments or #[doc = ".."] attributes

fn name(cfg: &Config) -> String

Name of this type in TypeScript, including generic parameters

fn decl_concrete(cfg: &Config) -> String

Declaration of this type using the supplied generic arguments. The resulting TypeScript definition will not be generic. For that, see TS::decl(). If this type is not generic, then this function is equivalent to TS::decl().

fn decl(cfg: &Config) -> String

Declaration of this type, e.g. type User = { user_id: number, ... }. This function will panic if the type has no declaration.

fn inline(cfg: &Config) -> String

Formats this types definition in TypeScript, e.g { user_id: number }. This function will panic if the type cannot be inlined.

fn inline_flattened(cfg: &Config) -> String

Flatten a type declaration. This function will panic if the type cannot be flattened.

fn visit_generics(v: &mut impl TypeVisitor)

where Self: 'static,

Iterates over all type parameters of this type.

fn output_path() -> Option<PathBuf>

Returns the output path to where T should be exported, relative to the output directory. The returned path does not include any base directory.

fn visit_dependencies(v: &mut impl TypeVisitor)

where Self: 'static,

Iterates over all dependency of this type.

fn dependencies(cfg: &Config) -> Vec<Dependency>

where Self: 'static,

Resolves all dependencies of this type recursively.

fn export(cfg: &Config) -> Result<(), ExportError>

where Self: 'static,

Manually export this type to the filesystem. To export this type together with all of its dependencies, use TS::export_all.

fn export_all(cfg: &Config) -> Result<(), ExportError>

where Self: 'static,

Manually export this type to the filesystem, together with all of its dependencies. To export only this type, without its dependencies, use TS::export.

fn export_to_string(cfg: &Config) -> Result<String, ExportError>

where Self: 'static,

Manually generate bindings for this type, returning a String. This function does not format the output, even if the format feature is enabled.