Struct mz_compute_client::protocol::response::FrontiersResponse
source · pub struct FrontiersResponse<T = Timestamp> {
pub write_frontier: Option<Antichain<T>>,
pub input_frontier: Option<Antichain<T>>,
pub output_frontier: Option<Antichain<T>>,
}
Expand description
A response reporting advancement of frontiers of a compute collection.
All contained frontier fields are optional. None
values imply that the respective frontier
has not advanced and the previously reported value is still current.
Fields§
§write_frontier: Option<Antichain<T>>
The collection’s new write frontier, if any.
Upon receiving an updated write_frontier
, the controller may assume that the contents of the
collection are sealed for all times less than that frontier. Once it has reported the
write_frontier
as the empty frontier, the replica must no longer change the contents of the
collection.
input_frontier: Option<Antichain<T>>
The collection’s new input frontier, if any.
Upon receiving an updated input_frontier
, the controller may assume that the replica has
finished reading from the collection’s inputs up to that frontier. Once it has reported the
input_frontier
as the empty frontier, the replica must no longer read from the
collection’s inputs.
output_frontier: Option<Antichain<T>>
The collection’s new output frontier, if any.
Upon receiving an updated output_frontier
, the controller may assume that the replica
has finished processing the collection’s input up to that frontier.
The output_frontier
is often equal to the write_frontier
, but not always. Some
collections can jump their write frontiers ahead of the times they have finished
processing, causing the output_frontier
to lag behind the write_frontier
. Collections
writing materialized views do so in two cases:
REFRESH
MVs jump their write frontier ahead to the next refresh time.- In a multi-replica cluster, slower replicas observe and report the write frontier of the
fastest replica, by witnessing advancements of the target persist shard’s
upper
.
Implementations§
source§impl<T> FrontiersResponse<T>
impl<T> FrontiersResponse<T>
sourcepub fn has_updates(&self) -> bool
pub fn has_updates(&self) -> bool
Returns whether there are any contained updates.
Trait Implementations§
source§impl Arbitrary for FrontiersResponse
impl Arbitrary for FrontiersResponse
§type Strategy = BoxedStrategy<FrontiersResponse>
type Strategy = BoxedStrategy<FrontiersResponse>
Strategy
used to generate values of type Self
.§type Parameters = ()
type Parameters = ()
arbitrary_with
accepts for configuration
of the generated Strategy
. Parameters must implement Default
.source§fn arbitrary_with(_args: Self::Parameters) -> Self::Strategy
fn arbitrary_with(_args: Self::Parameters) -> Self::Strategy
source§impl<T: Clone> Clone for FrontiersResponse<T>
impl<T: Clone> Clone for FrontiersResponse<T>
source§fn clone(&self) -> FrontiersResponse<T>
fn clone(&self) -> FrontiersResponse<T>
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl<T: Debug> Debug for FrontiersResponse<T>
impl<T: Debug> Debug for FrontiersResponse<T>
source§impl<T: Default> Default for FrontiersResponse<T>
impl<T: Default> Default for FrontiersResponse<T>
source§fn default() -> FrontiersResponse<T>
fn default() -> FrontiersResponse<T>
source§impl<'de, T> Deserialize<'de> for FrontiersResponse<T>where
T: Deserialize<'de>,
impl<'de, T> Deserialize<'de> for FrontiersResponse<T>where
T: Deserialize<'de>,
source§fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
source§impl<T: PartialEq> PartialEq for FrontiersResponse<T>
impl<T: PartialEq> PartialEq for FrontiersResponse<T>
source§impl RustType<ProtoFrontiersResponse> for FrontiersResponse
impl RustType<ProtoFrontiersResponse> for FrontiersResponse
source§fn into_proto(&self) -> ProtoFrontiersResponse
fn into_proto(&self) -> ProtoFrontiersResponse
Self
into a Proto
value.source§fn from_proto(proto: ProtoFrontiersResponse) -> Result<Self, TryFromProtoError>
fn from_proto(proto: ProtoFrontiersResponse) -> Result<Self, TryFromProtoError>
source§fn into_proto_owned(self) -> Proto
fn into_proto_owned(self) -> Proto
Self::into_proto
that types can
optionally implement, otherwise, the default implementation
delegates to Self::into_proto
.source§impl<T> Serialize for FrontiersResponse<T>where
T: Serialize,
impl<T> Serialize for FrontiersResponse<T>where
T: Serialize,
impl<T> StructuralPartialEq for FrontiersResponse<T>
Auto Trait Implementations§
impl<T> Freeze for FrontiersResponse<T>
impl<T> RefUnwindSafe for FrontiersResponse<T>where
T: RefUnwindSafe,
impl<T> Send for FrontiersResponse<T>where
T: Send,
impl<T> Sync for FrontiersResponse<T>where
T: Sync,
impl<T> Unpin for FrontiersResponse<T>where
T: Unpin,
impl<T> UnwindSafe for FrontiersResponse<T>where
T: UnwindSafe,
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source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
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fn borrow_mut(&mut self) -> &mut T
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impl<T> CloneToUninit for Twhere
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clone_to_uninit
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