pub struct AggregatedStatistics {
worker_id: usize,
worker_count: usize,
local_source_statistics: BTreeMap<GlobalId, (usize, SourceStatistics)>,
local_sink_statistics: BTreeMap<GlobalId, (usize, SinkStatistics)>,
global_source_statistics: BTreeMap<GlobalId, (usize, Vec<Option<SourceStatisticsUpdate>>)>,
global_sink_statistics: BTreeMap<GlobalId, (usize, Vec<Option<SinkStatisticsUpdate>>)>,
}Expand description
A structure that keeps track of local statistics, as well as aggregating statistics into a single worker (currently worker 0).
This is because we ONLY want to emit statistics for gauge-style-statistics when
ALL workers have caught up to the currently running instance of a source/sink and have
reported an accurate gauge. This prevents issues like 1 worker reporting
snapshot_committed=true before the others workers have caught up to report that they haven’t
finished snapshotting.
The API flow is:
- Initialize sources/sinks with
initialize_sourceorinitialize_sink. This advances the local epoch. - Advance the global epoch with
advance_global_epoch. This should always be called strictly before reinitializing objects. - Emit a snapshot of local data with
emit_local, which can be broadcasted to other workers. - Ingest data from other workers with
ingest. - Emit a
snapshotof global data (i.e. skipping objects that don’t have all workers caught up) withsnapshot.
All functions can and should be called from ALL workers.
Note that we hand-roll a statistics epoch here, but in the future, when the storage controller has top-level support for dataflow epochs, this logic can be entirely moved there.
Fields§
§worker_id: usize§worker_count: usize§local_source_statistics: BTreeMap<GlobalId, (usize, SourceStatistics)>§local_sink_statistics: BTreeMap<GlobalId, (usize, SinkStatistics)>§global_source_statistics: BTreeMap<GlobalId, (usize, Vec<Option<SourceStatisticsUpdate>>)>§global_sink_statistics: BTreeMap<GlobalId, (usize, Vec<Option<SinkStatisticsUpdate>>)>Implementations§
Source§impl AggregatedStatistics
impl AggregatedStatistics
Sourcepub fn new(worker_id: usize, worker_count: usize) -> Self
pub fn new(worker_id: usize, worker_count: usize) -> Self
Initialize a new AggregatedStatistics.
Sourcepub fn get_source(&self, id: &GlobalId) -> Option<&SourceStatistics>
pub fn get_source(&self, id: &GlobalId) -> Option<&SourceStatistics>
Get a SourceStatistics for an id, if it exists.
Sourcepub fn get_sink(&self, id: &GlobalId) -> Option<&SinkStatistics>
pub fn get_sink(&self, id: &GlobalId) -> Option<&SinkStatistics>
Get a SinkStatistics for an id, if it exists.
Sourcepub fn deinitialize(&mut self, id: GlobalId)
pub fn deinitialize(&mut self, id: GlobalId)
Deinitialize an object. Other methods other than initialize_source and initialize_sink
will never overwrite this.
Sourcepub fn advance_global_epoch(&mut self, id: GlobalId)
pub fn advance_global_epoch(&mut self, id: GlobalId)
Advance the global epoch for statistics.
Gauge values from previous epochs will be ignored. Counter values from previous epochs will still be applied as usual.
Sourcepub fn initialize_source<F: FnOnce() -> SourceStatistics>(
&mut self,
id: GlobalId,
resume_upper: Antichain<Timestamp>,
stats: F,
)
pub fn initialize_source<F: FnOnce() -> SourceStatistics>( &mut self, id: GlobalId, resume_upper: Antichain<Timestamp>, stats: F, )
Re-initialize a source. If it already exists, then its local epoch is advanced.
Sourcepub fn initialize_sink<F: FnOnce() -> SinkStatistics>(
&mut self,
id: GlobalId,
stats: F,
)
pub fn initialize_sink<F: FnOnce() -> SinkStatistics>( &mut self, id: GlobalId, stats: F, )
Re-initialize a sink. If it already exists, then its local epoch is advanced.
Sourcepub fn ingest(
&mut self,
source_statistics: Vec<(usize, SourceStatisticsRecord)>,
sink_statistics: Vec<(usize, SinkStatisticsRecord)>,
)
pub fn ingest( &mut self, source_statistics: Vec<(usize, SourceStatisticsRecord)>, sink_statistics: Vec<(usize, SinkStatisticsRecord)>, )
Ingest data from other workers.
fn _emit_local( &mut self, ) -> (Vec<(usize, SourceStatisticsRecord)>, Vec<(usize, SinkStatisticsRecord)>)
Sourcepub fn emit_local(
&mut self,
) -> (Vec<(usize, SourceStatisticsRecord)>, Vec<(usize, SinkStatisticsRecord)>)
pub fn emit_local( &mut self, ) -> (Vec<(usize, SourceStatisticsRecord)>, Vec<(usize, SinkStatisticsRecord)>)
Emit a snapshot of this workers local data.
Sourcepub fn snapshot(
&mut self,
) -> (Vec<SourceStatisticsUpdate>, Vec<SinkStatisticsUpdate>)
pub fn snapshot( &mut self, ) -> (Vec<SourceStatisticsUpdate>, Vec<SinkStatisticsUpdate>)
Emit a global snapshot of data. This does not include objects whose workers have not initialized gauges for the current epoch.
Auto Trait Implementations§
impl Freeze for AggregatedStatistics
impl !RefUnwindSafe for AggregatedStatistics
impl !Send for AggregatedStatistics
impl !Sync for AggregatedStatistics
impl Unpin for AggregatedStatistics
impl !UnwindSafe for AggregatedStatistics
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