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https://github.com/prometheus/prometheus
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be11cb2b07
The one central sample ingestion channel has caused a variety of trouble. This commit removes it. Targets and rule evaluation call an Append method directly now. To incorporate multiple storage backends (like OpenTSDB), storage.Tee forks the Append into two different appenders. Note that the tsdb queue manager had its own queue anyway. It was a queue after a queue... Much queue, so overhead... Targets have their own little buffer (implemented as a channel) to avoid stalling during an http scrape. But a new scrape will only be started once the old one is fully ingested. The contraption of three pipelined ingesters was removed. A Target is an ingester itself now. Despite more logic in Target, things should be less confusing now. Also, remove lint and vet warnings in ast.go.
41 lines
1.0 KiB
Go
41 lines
1.0 KiB
Go
// Copyright 2013 The Prometheus Authors
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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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package retrieval
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import (
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"time"
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clientmodel "github.com/prometheus/client_golang/model"
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)
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type nopAppender struct{}
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func (a nopAppender) Append(*clientmodel.Sample) {
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}
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type slowAppender struct{}
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func (a slowAppender) Append(*clientmodel.Sample) {
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time.Sleep(time.Millisecond)
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return
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}
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type collectResultAppender struct {
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result clientmodel.Samples
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}
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func (a *collectResultAppender) Append(s *clientmodel.Sample) {
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a.result = append(a.result, s)
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}
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