Struct ZsnapHeader

Source

pub struct ZsnapHeader {
    pub zsnap: u32,
    pub selectors: Vec<String>,
    pub base: String,
    pub collected_at: String,
    pub collection_span_s: f64,
    pub asked: u64,
    pub answered: u64,
    pub elided: u64,
    pub errors: u64,
    pub superseded: u64,
    pub roster: Asked<usize>,
}

Expand description

The first line of a .zsnap file (RFC 13 §4.4): what was asked, under which base, when, and — the fact a capture does not need — over what span. The base is the operator’s stated deployment base at collection time; recorded keys are full wire keys and are never re-derived from it (O3).

Fields§

§zsnap: u32

Format version (ZSNAP_VERSION).

§selectors: Vec<String>

The full wire selectors the snapshot GET, one fan-in each. A ** never crosses an @-chunk, so a ** snapshot excludes the verbatim planes by construction (O5).

§base: String

The deployment base the operator resolved at collection time (may be empty: the base-less bus-root deployment).

§collected_at: String

Collection start, RFC 3339 wall clock.

§collection_span_s: f64

How long the collection took, first GET issued to last reply drained, the roster ask included. The number every rendering states: a fan-in GET is collected over this, not at collected_at.

§asked: u64

GETs issued — one per selector, whether or not it answered.

§answered: u64

Value replies received across every GET, before last-writer-wins folded them per key — so answered - superseded is the row count.

§elided: u64

Replies that arrived and were not kept past the observer’s bound (O6). Absent at zero.

§errors: u64

Error replies (RFC 05 §3 envelopes) — a refusal is not a value and not silence. Absent at zero.

§superseded: u64

Answers that lost last-writer-wins to a newer reply on the same key (RFC 04 §1.2). Absent at zero.

§roster: Asked<usize>

How many origins the liveliness roster reported, when it was asked. Absent when it was not (O4) — and then every row’s holder is Holder::Unattributed.

ZsnapHeader

Struct ZsnapHeader Copy item path

Fields§

Trait Implementations§

impl Clone for ZsnapHeader

fn clone(&self) -> ZsnapHeader

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

impl Debug for ZsnapHeader

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

impl<'de> Deserialize<'de> for ZsnapHeader

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where __D: Deserializer<'de>,

impl PartialEq for ZsnapHeader

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

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

impl Serialize for ZsnapHeader

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

impl StructuralPartialEq for ZsnapHeader

Auto Trait Implementations§

impl Freeze for ZsnapHeader

impl RefUnwindSafe for ZsnapHeader

impl Send for ZsnapHeader

impl Sync for ZsnapHeader

impl Unpin for ZsnapHeader

impl UnsafeUnpin for ZsnapHeader

impl UnwindSafe for ZsnapHeader

Blanket Implementations§

impl<Source> AccessAs for Source

fn ref_as<T>(&self) -> <Source as IGuardRef<T>>::Guard<'_>where Source: IGuardRef<T>, T: ?Sized,

fn mut_as<T>(&mut self) -> <Source as IGuardMut<T>>::GuardMut<'_>where Source: IGuardMut<T>, T: ?Sized,

impl<T> Any for Twhere T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> AsNode<T> for T

fn as_node(&self) -> &T

impl<T> AsNodeMut<T> for T

fn as_node_mut(&mut self) -> &mut T

impl<'a, T, E> AsTaggedExplicit<'a, E> for Twhere T: 'a,

fn explicit(self, class: Class, tag: u32) -> TaggedParser<'a, Explicit, Self, E>

impl<'a, T, E> AsTaggedImplicit<'a, E> for Twhere T: 'a,

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impl<T> Borrow<T> for Twhere T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DTwhere ST: ?Sized, DT: ?Sized,

impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DTwhere ST: ?Sized, DT: ?Sized,

impl<T> CloneToUninit for Twhere T: Clone,

unsafe fn clone_to_uninit(&self, dest: *mut u8)

impl<T> DeserializeOwned for Twhere T: for<'de> Deserialize<'de>,

impl<T> DynClone for Twhere T: Clone,

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impl<T> From<T> for T

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fn in_current_span(self) -> Instrumented<Self> ⓘ

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impl<T> IntoEither for T

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impl<T> Same for T

type Output = T

impl<T> ToOwned for Twhere T: Clone,

type Owned = T

Struct ZsnapHeader

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where __D: Deserializer<'de>,

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where S: Serializer,

fn ref_as<T>(&self) -> <Source as IGuardRef<T>>::Guard<'_>
where Source: IGuardRef<T>, T: ?Sized,

fn mut_as<T>(&mut self) -> <Source as IGuardMut<T>>::GuardMut<'_>
where Source: IGuardMut<T>, T: ?Sized,

impl<T> Any for T
where T: 'static + ?Sized,

impl<'a, T, E> AsTaggedExplicit<'a, E> for T
where T: 'a,

impl<'a, T, E> AsTaggedImplicit<'a, E> for T
where T: 'a,

impl<T> Borrow<T> for T
where T: ?Sized,

impl<T> BorrowMut<T> for T
where T: ?Sized,

impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

impl<T> CloneToUninit for T
where T: Clone,

impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,

impl<T> DynClone for T
where T: Clone,

impl<T, As> IGuardMut<As> for T
where T: Into<As>, As: Into<T>,

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where T: Into<As>, As: Into<T>,

impl<T, U> Into<U> for T
where U: From<T>,

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

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where T: ?Sized,

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where T: Clone,

impl<T, U> TryFrom<U> for T
where U: Into<T>,

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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where V: MultiLane<T>,

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where S: Into<Dispatch>,