pub struct ComputeCommandHistory<T = Timestamp> {
    reduced_count: usize,
    commands: Vec<ComputeCommand<T>>,
    dataflow_count: usize,
}

Fields

reduced_count: usize

The number of commands at the last time we compacted the history.

commands: Vec<ComputeCommand<T>>

The sequence of commands that should be applied.

This list may not be “compact” in that there can be commands that could be optimized or removed given the context of other commands, for example compaction commands that can be unified, or dataflows that can be dropped due to allowed compaction.

dataflow_count: usize

The number of dataflows in the compute command history.

Implementations

Add a command to the history.

This action will reduce the history every time it doubles while retaining the provided peeks.

Obtains the length of this compute command history in number of commands.

Obtains the number of dataflows in this compute command history.

Reduces self.history to a minimal form.

This action not only simplifies the issued history, but importantly reduces the instructions to only reference inputs from times that are still certain to be valid. Commands that allow compaction of a collection also remove certainty that the inputs will be available for times not greater or equal to that compaction frontier.

Retain only those peeks present in peeks and discard the rest.

Iterate through the contained commands.

Trait Implementations

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