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measure.go
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measure.go
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// Licensed to Apache Software Foundation (ASF) under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Apache Software Foundation (ASF) licenses this file to you under
// the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
// Package measure implements a time-series-based storage which is consists of a sequence of data points.
// Each data point contains tags and fields. They arrive in a fixed interval. A data point could be updated
// by one with the identical entity(series_id) and timestamp.
package measure
import (
"time"
commonv1 "github.com/apache/skywalking-banyandb/api/proto/banyandb/common/v1"
databasev1 "github.com/apache/skywalking-banyandb/api/proto/banyandb/database/v1"
"github.com/apache/skywalking-banyandb/banyand/queue"
"github.com/apache/skywalking-banyandb/pkg/logger"
"github.com/apache/skywalking-banyandb/pkg/partition"
"github.com/apache/skywalking-banyandb/pkg/query/logical"
"github.com/apache/skywalking-banyandb/pkg/schema"
"github.com/apache/skywalking-banyandb/pkg/timestamp"
)
const (
maxValuesBlockSize = 8 * 1024 * 1024
maxTimestampsBlockSize = 8 * 1024 * 1024
maxTagFamiliesMetadataSize = 8 * 1024 * 1024
maxUncompressedBlockSize = 2 * 1024 * 1024
maxUncompressedPrimaryBlockSize = 128 * 1024
maxBlockLength = 8 * 1024
defaultFlushTimeout = 5 * time.Second
)
type option struct {
mergePolicy *mergePolicy
flushTimeout time.Duration
}
type measure struct {
databaseSupplier schema.Supplier
l *logger.Logger
schema *databasev1.Measure
processorManager *topNProcessorManager
name string
group string
indexRules []*databasev1.IndexRule
indexRuleLocators partition.IndexRuleLocator
topNAggregations []*databasev1.TopNAggregation
interval time.Duration
shardNum uint32
}
func (s *measure) startSteamingManager(pipeline queue.Queue) error {
if len(s.topNAggregations) == 0 {
return nil
}
tagMapSpec := logical.TagSpecMap{}
tagMapSpec.RegisterTagFamilies(s.schema.GetTagFamilies())
s.processorManager = &topNProcessorManager{
l: s.l,
pipeline: pipeline,
m: s,
s: tagMapSpec,
topNSchemas: s.topNAggregations,
processorMap: make(map[*commonv1.Metadata][]*topNStreamingProcessor),
}
return s.processorManager.start()
}
func (s *measure) GetSchema() *databasev1.Measure {
return s.schema
}
func (s *measure) GetIndexRules() []*databasev1.IndexRule {
return s.indexRules
}
func (s *measure) Close() error {
if s.processorManager == nil {
return nil
}
return s.processorManager.Close()
}
func (s *measure) parseSpec() (err error) {
s.name, s.group = s.schema.GetMetadata().GetName(), s.schema.GetMetadata().GetGroup()
if s.schema.Interval != "" {
s.interval, err = timestamp.ParseDuration(s.schema.Interval)
}
s.indexRuleLocators = partition.ParseIndexRuleLocators(s.schema.GetEntity(), s.schema.GetTagFamilies(), s.indexRules)
return err
}
type measureSpec struct {
schema *databasev1.Measure
indexRules []*databasev1.IndexRule
topNAggregations []*databasev1.TopNAggregation
}
func openMeasure(shardNum uint32, db schema.Supplier, spec measureSpec, l *logger.Logger, pipeline queue.Queue,
) (*measure, error) {
m := &measure{
shardNum: shardNum,
schema: spec.schema,
indexRules: spec.indexRules,
topNAggregations: spec.topNAggregations,
l: l,
}
if err := m.parseSpec(); err != nil {
return nil, err
}
if db == nil {
return m, nil
}
m.databaseSupplier = db
if startErr := m.startSteamingManager(pipeline); startErr != nil {
l.Err(startErr).Str("measure", spec.schema.GetMetadata().GetName()).
Msg("fail to start streaming manager")
}
return m, nil
}