Interface for the aggregator that aggregates a cluster-level metric from the metrics of different hosts.
An interface for the aggregator that aggregates metrics of different hosts into multiple cluster-level metrics.
Interface for the aggregator that aggregates into a single value from the metrics of different hosts.
A metric of a given instance.
Builder to create
A nested class to hold named string constants for their corresponding metrics.
Configurations used by the metrics system.
A filter that matches the instance-level metrics by the instance type and metric name.
A MetricsSystem is created by a specific instance(master, worker).
Represents a time series which can be graphed in the UI.
The list of under filesystem operations triggered by master or workers.
An enum of supported instance type.
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