appender

Documentation

Overview

Copyright 2018 Iguazio Systems Ltd.

Licensed under the Apache License, Version 2.0 (the "License") with an addition restriction as set forth herein. 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.

In addition, you may not use the software for any purposes that are illegal under applicable law, and the grant of the foregoing license under the Apache 2.0 license is conditioned upon your compliance with such restriction.

Index

• Constants
• type Cache
  • func NewCache(max int) *Cache
  • func (c *Cache) Add(key uint64, value *MetricState)
  • func (c *Cache) Get(key uint64) (value *MetricState, ok bool)
  • func (c *Cache) ResetMetric(key uint64)
• type ElasticQueue
  • func NewElasticQueue() *ElasticQueue
  • func (eq *ElasticQueue) IsEmpty() bool
  • func (eq *ElasticQueue) Length() int
  • func (eq *ElasticQueue) Pop() *MetricState
  • func (eq *ElasticQueue) PopN(length int) []*MetricState
  • func (eq *ElasticQueue) Push(val *MetricState) int
  • func (eq *ElasticQueue) Rotate(val *MetricState) (*MetricState, int)
• type MetricState
• type MetricsCache
  • func NewMetricsCache(container v3io.Container, logger logger.Logger, cfg *config.V3ioConfig, ...) *MetricsCache
  • func (mc *MetricsCache) Add(lset utils.LabelsIfc, t int64, v interface{}) (uint64, error)
  • func (mc *MetricsCache) AddFast(ref uint64, t int64, v interface{}) error
  • func (mc *MetricsCache) Close()
  • func (mc *MetricsCache) Start() error
  • func (mc *MetricsCache) WaitForCompletion(timeout time.Duration) (int, error)

Constants

const ListSize = 256

Types

type Cache

type Cache struct {
	// contains filtered or unexported fields
}

Cache is an LRU cache. It is not safe for concurrent access.

func NewCache

func NewCache(max int) *Cache

func (*Cache) Add

func (c *Cache) Add(key uint64, value *MetricState)

Add adds a value to the cache.

func (*Cache) Get

func (c *Cache) Get(key uint64) (value *MetricState, ok bool)

Get looks up a key's value from the cache.

func (*Cache) ResetMetric

func (c *Cache) ResetMetric(key uint64)

type ElasticQueue

type ElasticQueue struct {
	// contains filtered or unexported fields
}

func NewElasticQueue

func NewElasticQueue() *ElasticQueue

Elastic Queue, a fifo queue with dynamic resize

func (*ElasticQueue) IsEmpty

func (eq *ElasticQueue) IsEmpty() bool

Is the queue empty

func (*ElasticQueue) Length

func (eq *ElasticQueue) Length() int

Number of elements in the queue

func (*ElasticQueue) Pop

func (eq *ElasticQueue) Pop() *MetricState

func (*ElasticQueue) PopN

func (eq *ElasticQueue) PopN(length int) []*MetricState

func (*ElasticQueue) Push

func (eq *ElasticQueue) Push(val *MetricState) int

func (*ElasticQueue) Rotate

func (eq *ElasticQueue) Rotate(val *MetricState) (*MetricState, int)

Atomic rotate, push a value to the tail and pop one from the head

type MetricState

type MetricState struct {
	sync.RWMutex

	Lset utils.LabelsIfc
	// contains filtered or unexported fields
}

to add, rollups policy (cnt, sum, min/max, sum^2) + interval , or policy in per name label

type MetricsCache

type MetricsCache struct {
	NameLabelMap map[string]bool // temp store all lable names
	// contains filtered or unexported fields
}

store the state and metadata for all the metrics

func NewMetricsCache

func NewMetricsCache(container v3io.Container, logger logger.Logger, cfg *config.V3ioConfig,
	partMngr *partmgr.PartitionManager) *MetricsCache

func (*MetricsCache) Add

func (mc *MetricsCache) Add(lset utils.LabelsIfc, t int64, v interface{}) (uint64, error)

First time add time & value to metric (by label set)

func (*MetricsCache) AddFast

func (mc *MetricsCache) AddFast(ref uint64, t int64, v interface{}) error

fast Add to metric (by refID)

func (*MetricsCache) Close

func (mc *MetricsCache) Close()

func (*MetricsCache) Start

func (mc *MetricsCache) Start() error

func (*MetricsCache) WaitForCompletion

func (mc *MetricsCache) WaitForCompletion(timeout time.Duration) (int, error)