mirror of
https://github.com/prometheus/prometheus.git
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1f7f89b4e3
This commit simplifies the way that compactions across a database's keyspace occur due to reading the LevelDB internals. Secondarily it introduces the database size estimation mechanisms.
52 lines
1.5 KiB
Go
52 lines
1.5 KiB
Go
// Copyright 2013 Prometheus Team
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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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// Pruner is responsible for cleaning all Prometheus disk databases, which
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// minimally includes 1. applying pending commit logs, 2. compacting SSTables,
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// 3. purging stale SSTables, and 4. removing old tombstones.
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package main
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import (
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"flag"
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"github.com/prometheus/prometheus/storage/metric"
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"log"
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"time"
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)
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var (
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storageRoot = flag.String("storage.root", "", "The path to the storage root for Prometheus.")
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)
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func main() {
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flag.Parse()
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if storageRoot == nil || *storageRoot == "" {
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log.Fatal("Must provide a path...")
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}
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persistences, err := metric.NewLevelDBMetricPersistence(*storageRoot)
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if err != nil {
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log.Fatal(err)
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}
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defer persistences.Close()
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start := time.Now()
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log.Printf("Starting compaction...")
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size, _ := persistences.ApproximateSizes()
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log.Printf("Original Size: %d", size)
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persistences.CompactKeyspaces()
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log.Printf("Finished in %s", time.Since(start))
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size, _ = persistences.ApproximateSizes()
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log.Printf("New Size: %d", size)
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}
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