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56 lines
2.2 KiB
56 lines
2.2 KiB
6 years ago
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// Copyright 2017, OpenCensus Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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/*
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Package stats contains support for OpenCensus stats recording.
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OpenCensus allows users to create typed measures, record measurements,
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aggregate the collected data, and export the aggregated data.
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Measures
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A measure represents a type of metric to be tracked and recorded.
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For example, latency, request Mb/s, and response Mb/s are measures
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to collect from a server.
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Each measure needs to be registered before being used. Measure
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constructors such as Int64 and Float64 automatically
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register the measure by the given name. Each registered measure needs
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to be unique by name. Measures also have a description and a unit.
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Libraries can define and export measures for their end users to
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create views and collect instrumentation data.
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Recording measurements
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Measurement is a data point to be collected for a measure. For example,
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for a latency (ms) measure, 100 is a measurement that represents a 100ms
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latency event. Users collect data points on the existing measures with
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the current context. Tags from the current context are recorded with the
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measurements if they are any.
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Recorded measurements are dropped immediately if user is not aggregating
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them via views. Users don't necessarily need to conditionally enable/disable
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recording to reduce cost. Recording of measurements is cheap.
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Libraries can always record measurements, and end-users can later decide
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on which measurements they want to collect by registering views. This allows
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libraries to turn on the instrumentation by default.
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*/
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package stats // import "go.opencensus.io/stats"
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// TODO(acetechnologist): Add a link to the language independent OpenCensus
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// spec when it is available.
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