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https://github.com/prometheus/prometheus.git
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b3e34c6658
This commit introduces to Prometheus a batch database sample curator, which corroborates the high watermarks for sample series against the curation watermark table to see whether a curator of a given type needs to be run. The curator is an abstract executor, which runs various curation strategies across the database. It remarks the progress for each type of curation processor that runs for a given sample series. A curation procesor is responsible for effectuating the underlying batch changes that are request. In this commit, we introduce the CompactionProcessor, which takes several bits of runtime metadata and combine sparse sample entries in the database together to form larger groups. For instance, for a given series it would be possible to have the curator effectuate the following grouping: - Samples Older than Two Weeks: Grouped into Bunches of 10000 - Samples Older than One Week: Grouped into Bunches of 1000 - Samples Older than One Day: Grouped into Bunches of 100 - Samples Older than One Hour: Grouped into Bunches of 10 The benefits hereof of such a compaction are 1. a smaller search space in the database keyspace, 2. better employment of compression for repetious values, and 3. reduced seek times.
104 lines
3.4 KiB
Go
104 lines
3.4 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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package model
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import (
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"bytes"
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"code.google.com/p/goprotobuf/proto"
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"fmt"
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dto "github.com/prometheus/prometheus/model/generated"
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"time"
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)
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// CurationRemark provides a representation of dto.CurationValue with associated
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// business logic methods attached to it to enhance code readability.
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type CurationRemark struct {
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LastCompletionTimestamp time.Time
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}
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// OlderThan answers whether this CurationRemark is older than the provided
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// cutOff time.
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func (c CurationRemark) OlderThan(t time.Time) bool {
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return c.LastCompletionTimestamp.Before(t)
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}
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// Equal answers whether the two CurationRemarks are equivalent.
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func (c CurationRemark) Equal(o CurationRemark) bool {
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return c.LastCompletionTimestamp.Equal(o.LastCompletionTimestamp)
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}
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func (c CurationRemark) String() string {
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return fmt.Sprintf("Last curated at %s", c.LastCompletionTimestamp)
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}
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// ToDTO generates the dto.CurationValue representation of this.
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func (c CurationRemark) ToDTO() *dto.CurationValue {
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return &dto.CurationValue{
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LastCompletionTimestamp: proto.Int64(c.LastCompletionTimestamp.Unix()),
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}
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}
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// NewCurationRemarkFromDTO builds CurationRemark from the provided
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// dto.CurationValue object.
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func NewCurationRemarkFromDTO(d *dto.CurationValue) CurationRemark {
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return CurationRemark{
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LastCompletionTimestamp: time.Unix(*d.LastCompletionTimestamp, 0).UTC(),
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}
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}
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// CurationKey provides a representation of dto.CurationKey with asociated
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// business logic methods attached to it to enhance code readability.
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type CurationKey struct {
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Fingerprint Fingerprint
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ProcessorMessageRaw []byte
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ProcessorMessageTypeName string
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IgnoreYoungerThan time.Duration
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}
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// Equal answers whether the two CurationKeys are equivalent.
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func (c CurationKey) Equal(o CurationKey) (equal bool) {
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switch {
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case !c.Fingerprint.Equal(o.Fingerprint):
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return
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case bytes.Compare(c.ProcessorMessageRaw, o.ProcessorMessageRaw) != 0:
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return
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case c.ProcessorMessageTypeName != o.ProcessorMessageTypeName:
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return
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case c.IgnoreYoungerThan != o.IgnoreYoungerThan:
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return
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}
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return true
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}
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// ToDTO generates a dto.CurationKey representation of this.
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func (c CurationKey) ToDTO() *dto.CurationKey {
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return &dto.CurationKey{
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Fingerprint: c.Fingerprint.ToDTO(),
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ProcessorMessageRaw: c.ProcessorMessageRaw,
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ProcessorMessageTypeName: proto.String(c.ProcessorMessageTypeName),
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IgnoreYoungerThan: proto.Int64(int64(c.IgnoreYoungerThan)),
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}
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}
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// NewCurationKeyFromDTO builds CurationKey from the provided dto.CurationKey.
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func NewCurationKeyFromDTO(d *dto.CurationKey) CurationKey {
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return CurationKey{
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Fingerprint: NewFingerprintFromDTO(d.Fingerprint),
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ProcessorMessageRaw: d.ProcessorMessageRaw,
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ProcessorMessageTypeName: *d.ProcessorMessageTypeName,
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IgnoreYoungerThan: time.Duration(*d.IgnoreYoungerThan),
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}
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}
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