// Copyright (C) 2019-2020 Zilliz. All rights reserved.
//
// Licensed 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 paramtable

import (
	"fmt"
	"math"
	"runtime"
	"strconv"
	"strings"
	"sync"
	"time"

	"github.com/shirou/gopsutil/v3/disk"
)

const (
	// DefaultRetentionDuration defines the default duration for retention which is 1 days in seconds.
	DefaultRetentionDuration = 3600 * 24

	// DefaultIndexSliceSize defines the default slice size of index file when serializing.
	DefaultIndexSliceSize        = 16
	DefaultGracefulTime          = 5000 //ms
	DefaultGracefulStopTimeout   = 30   // s
	DefaultThreadCoreCoefficient = 10

	DefaultSessionTTL        = 60 //s
	DefaultSessionRetryTimes = 30

	DefaultMaxDegree                = 56
	DefaultSearchListSize           = 100
	DefaultPQCodeBudgetGBRatio      = 0.125
	DefaultBuildNumThreadsRatio     = 1.0
	DefaultSearchCacheBudgetGBRatio = 0.10
	DefaultLoadNumThreadRatio       = 8.0
	DefaultBeamWidthRatio           = 4.0
)

// ComponentParam is used to quickly and easily access all components' configurations.
type ComponentParam struct {
	ServiceParam
	once sync.Once

	CommonCfg       commonConfig
	QuotaConfig     quotaConfig
	AutoIndexConfig autoIndexConfig

	RootCoordCfg  rootCoordConfig
	ProxyCfg      proxyConfig
	QueryCoordCfg queryCoordConfig
	QueryNodeCfg  queryNodeConfig
	DataCoordCfg  dataCoordConfig
	DataNodeCfg   dataNodeConfig
	IndexCoordCfg indexCoordConfig
	IndexNodeCfg  indexNodeConfig
	HookCfg       hookConfig
}

// InitOnce initialize once
func (p *ComponentParam) InitOnce() {
	p.once.Do(func() {
		p.Init()
	})
}

// Init initialize the global param table
func (p *ComponentParam) Init() {
	p.ServiceParam.Init()

	p.CommonCfg.init(&p.BaseTable)
	p.QuotaConfig.init(&p.BaseTable)
	p.AutoIndexConfig.init(&p.BaseTable)

	p.RootCoordCfg.init(&p.BaseTable)
	p.ProxyCfg.init(&p.BaseTable)
	p.QueryCoordCfg.init(&p.BaseTable)
	p.QueryNodeCfg.init(&p.BaseTable)
	p.DataCoordCfg.init(&p.BaseTable)
	p.DataNodeCfg.init(&p.BaseTable)
	p.IndexCoordCfg.init(&p.BaseTable)
	p.IndexNodeCfg.init(&p.BaseTable)
	p.HookCfg.init()
}

func (p *ComponentParam) RocksmqEnable() bool {
	return p.RocksmqCfg.Path.GetValue() != ""
}

func (p *ComponentParam) PulsarEnable() bool {
	return p.PulsarCfg.Address.GetValue() != ""
}

func (p *ComponentParam) KafkaEnable() bool {
	return p.KafkaCfg.Address.GetValue() != ""
}

// /////////////////////////////////////////////////////////////////////////////
// --- common ---
type commonConfig struct {
	ClusterPrefix ParamItem

	ProxySubName ParamItem

	RootCoordTimeTick   ParamItem
	RootCoordStatistics ParamItem
	RootCoordDml        ParamItem
	RootCoordDelta      ParamItem
	RootCoordSubName    ParamItem

	QueryCoordSearch       ParamItem
	QueryCoordSearchResult ParamItem
	QueryCoordTimeTick     ParamItem
	QueryNodeSubName       ParamItem

	DataCoordStatistic    ParamItem
	DataCoordTimeTick     ParamItem
	DataCoordSegmentInfo  ParamItem
	DataCoordSubName      ParamItem
	DataCoordWatchSubPath ParamItem
	DataNodeSubName       ParamItem

	DefaultPartitionName ParamItem
	DefaultIndexName     ParamItem
	RetentionDuration    ParamItem
	EntityExpirationTTL  ParamItem

	IndexSliceSize           ParamItem
	ThreadCoreCoefficient    ParamItem
	MaxDegree                ParamItem
	SearchListSize           ParamItem
	PQCodeBudgetGBRatio      ParamItem
	BuildNumThreadsRatio     ParamItem
	SearchCacheBudgetGBRatio ParamItem
	LoadNumThreadRatio       ParamItem
	BeamWidthRatio           ParamItem
	GracefulTime             ParamItem
	GracefulStopTimeout      ParamItem // unit: s

	// Search limit, which applies on:
	// maximum # of results to return (topK), and
	// maximum # of search requests (nq).
	// Check https://milvus.io/docs/limitations.md for more details.
	TopKLimit ParamItem

	StorageType ParamItem
	SimdType    ParamItem

	AuthorizationEnabled ParamItem
	SuperUsers           ParamItem

	ClusterName ParamItem

	SessionTTL        ParamItem
	SessionRetryTimes ParamItem
}

func (p *commonConfig) init(base *BaseTable) {
	// must init cluster prefix first
	p.ClusterPrefix = ParamItem{
		Key:          "common.chanNamePrefix.cluster",
		Version:      "2.1.0",
		FallbackKeys: []string{"msgChannel.chanNamePrefix.cluster"},
		PanicIfEmpty: true,
	}
	p.ClusterPrefix.Init(base.mgr)

	chanNamePrefix := func(prefix string) string {
		return strings.Join([]string{p.ClusterPrefix.GetValue(), prefix}, "-")
	}
	p.ProxySubName = ParamItem{
		Key:          "common.subNamePrefix.proxySubNamePrefix",
		Version:      "2.1.0",
		FallbackKeys: []string{"msgChannel.subNamePrefix.proxySubNamePrefix"},
		PanicIfEmpty: true,
		Formatter:    chanNamePrefix,
	}
	p.ProxySubName.Init(base.mgr)

	// --- rootcoord ---
	p.RootCoordTimeTick = ParamItem{
		Key:          "common.chanNamePrefix.rootCoordTimeTick",
		Version:      "2.1.0",
		FallbackKeys: []string{"msgChannel.chanNamePrefix.rootCoordTimeTick"},
		PanicIfEmpty: true,
		Formatter:    chanNamePrefix,
	}
	p.RootCoordTimeTick.Init(base.mgr)

	p.RootCoordStatistics = ParamItem{
		Key:          "common.chanNamePrefix.rootCoordStatistics",
		Version:      "2.1.0",
		FallbackKeys: []string{"msgChannel.chanNamePrefix.rootCoordStatistics"},
		PanicIfEmpty: true,
		Formatter:    chanNamePrefix,
	}
	p.RootCoordStatistics.Init(base.mgr)

	p.RootCoordDml = ParamItem{
		Key:          "common.chanNamePrefix.rootCoordDml",
		Version:      "2.1.0",
		FallbackKeys: []string{"msgChannel.chanNamePrefix.rootCoordDml"},
		PanicIfEmpty: true,
		Formatter:    chanNamePrefix,
	}
	p.RootCoordDml.Init(base.mgr)

	p.RootCoordDelta = ParamItem{
		Key:          "common.chanNamePrefix.rootCoordDelta",
		Version:      "2.1.0",
		FallbackKeys: []string{"msgChannel.chanNamePrefix.rootCoordDelta"},
		PanicIfEmpty: true,
		Formatter:    chanNamePrefix,
	}
	p.RootCoordDelta.Init(base.mgr)

	p.RootCoordSubName = ParamItem{
		Key:          "common.subNamePrefix.rootCoordSubNamePrefix",
		Version:      "2.1.0",
		FallbackKeys: []string{"msgChannel.subNamePrefix.rootCoordSubNamePrefix"},
		PanicIfEmpty: true,
		Formatter:    chanNamePrefix,
	}
	p.RootCoordSubName.Init(base.mgr)

	p.QueryCoordSearch = ParamItem{
		Key:          "common.chanNamePrefix.search",
		Version:      "2.1.0",
		FallbackKeys: []string{"msgChannel.chanNamePrefix.search"},
		PanicIfEmpty: true,
		Formatter:    chanNamePrefix,
	}
	p.QueryCoordSearch.Init(base.mgr)

	p.QueryCoordSearchResult = ParamItem{
		Key:          "common.chanNamePrefix.searchResult",
		Version:      "2.1.0",
		FallbackKeys: []string{"msgChannel.chanNamePrefix.searchResult"},
		PanicIfEmpty: true,
		Formatter:    chanNamePrefix,
	}
	p.QueryCoordSearchResult.Init(base.mgr)

	p.QueryCoordTimeTick = ParamItem{
		Key:          "common.chanNamePrefix.queryTimeTick",
		Version:      "2.1.0",
		FallbackKeys: []string{"msgChannel.chanNamePrefix.queryTimeTick"},
		PanicIfEmpty: true,
		Formatter:    chanNamePrefix,
	}
	p.QueryCoordTimeTick.Init(base.mgr)

	p.QueryNodeSubName = ParamItem{
		Key:          "common.subNamePrefix.queryNodeSubNamePrefix",
		Version:      "2.1.0",
		FallbackKeys: []string{"msgChannel.subNamePrefix.queryNodeSubNamePrefix"},
		PanicIfEmpty: true,
		Formatter:    chanNamePrefix,
	}
	p.QueryNodeSubName.Init(base.mgr)

	p.DataCoordStatistic = ParamItem{
		Key:          "common.chanNamePrefix.dataCoordStatistic",
		Version:      "2.1.0",
		FallbackKeys: []string{"msgChannel.chanNamePrefix.dataCoordStatistic"},
		PanicIfEmpty: true,
		Formatter:    chanNamePrefix,
	}
	p.DataCoordStatistic.Init(base.mgr)

	p.DataCoordTimeTick = ParamItem{
		Key:          "common.chanNamePrefix.dataCoordTimeTick",
		Version:      "2.1.0",
		FallbackKeys: []string{"msgChannel.chanNamePrefix.dataCoordTimeTick"},
		PanicIfEmpty: true,
		Formatter:    chanNamePrefix,
	}
	p.DataCoordTimeTick.Init(base.mgr)

	p.DataCoordSegmentInfo = ParamItem{
		Key:          "common.chanNamePrefix.dataCoordSegmentInfo",
		Version:      "2.1.0",
		FallbackKeys: []string{"msgChannel.chanNamePrefix.dataCoordSegmentInfo"},
		PanicIfEmpty: true,
		Formatter:    chanNamePrefix,
	}
	p.DataCoordSegmentInfo.Init(base.mgr)

	p.DataCoordSubName = ParamItem{
		Key:          "common.subNamePrefix.dataCoordSubNamePrefix",
		Version:      "2.1.0",
		FallbackKeys: []string{"msgChannel.subNamePrefix.dataCoordSubNamePrefix"},
		PanicIfEmpty: true,
		Formatter:    chanNamePrefix,
	}
	p.DataCoordSubName.Init(base.mgr)

	p.DataCoordWatchSubPath = ParamItem{
		Key:          "common.subNamePrefix.dataCoordWatchSubPath",
		Version:      "2.1.0",
		DefaultValue: "channelwatch",
		PanicIfEmpty: true,
	}
	p.DataCoordWatchSubPath.Init(base.mgr)

	p.DataNodeSubName = ParamItem{
		Key:          "common.subNamePrefix.dataNodeSubNamePrefix",
		Version:      "2.1.0",
		FallbackKeys: []string{"msgChannel.subNamePrefix.dataNodeSubNamePrefix"},
		PanicIfEmpty: true,
		Formatter:    chanNamePrefix,
	}
	p.DataNodeSubName.Init(base.mgr)

	p.DefaultPartitionName = ParamItem{
		Key:          "common.defaultPartitionName",
		Version:      "2.0.0",
		DefaultValue: "_default",
	}
	p.DefaultPartitionName.Init(base.mgr)

	p.DefaultIndexName = ParamItem{
		Key:          "common.defaultIndexName",
		Version:      "2.0.0",
		DefaultValue: "_default_idx",
	}
	p.DefaultIndexName.Init(base.mgr)

	p.RetentionDuration = ParamItem{
		Key:          "common.retentionDuration",
		Version:      "2.0.0",
		DefaultValue: strconv.Itoa(DefaultRetentionDuration),
	}
	p.RetentionDuration.Init(base.mgr)

	p.EntityExpirationTTL = ParamItem{
		Key:          "common.entityExpiration",
		Version:      "2.1.0",
		DefaultValue: "-1",
		Formatter: func(value string) string {
			ttl := getAsInt(value)
			if ttl < 0 {
				return "-1"
			}

			// make sure ttl is larger than retention duration to ensure time travel works
			if ttl > p.RetentionDuration.GetAsInt() {
				return strconv.Itoa(ttl)
			}
			return p.RetentionDuration.GetValue()
		},
	}
	p.EntityExpirationTTL.Init(base.mgr)

	p.SimdType = ParamItem{
		Key:          "common.simdType",
		Version:      "2.1.0",
		DefaultValue: "auto",
		FallbackKeys: []string{"knowhere.simdType"},
	}
	p.SimdType.Init(base.mgr)

	p.IndexSliceSize = ParamItem{
		Key:          "common.indexSliceSize",
		Version:      "2.0.0",
		DefaultValue: strconv.Itoa(DefaultIndexSliceSize),
	}
	p.IndexSliceSize.Init(base.mgr)

	p.MaxDegree = ParamItem{
		Key:          "common.DiskIndex.MaxDegree",
		Version:      "2.0.0",
		DefaultValue: strconv.Itoa(DefaultMaxDegree),
	}
	p.MaxDegree.Init(base.mgr)

	p.SearchListSize = ParamItem{
		Key:          "common.DiskIndex.SearchListSize",
		Version:      "2.0.0",
		DefaultValue: strconv.Itoa(DefaultSearchListSize),
	}
	p.SearchListSize.Init(base.mgr)

	p.PQCodeBudgetGBRatio = ParamItem{
		Key:          "common.DiskIndex.PQCodeBudgetGBRatio",
		Version:      "2.0.0",
		DefaultValue: fmt.Sprintf("%f", DefaultPQCodeBudgetGBRatio),
	}
	p.PQCodeBudgetGBRatio.Init(base.mgr)

	p.BuildNumThreadsRatio = ParamItem{
		Key:          "common.DiskIndex.BuildNumThreadsRatio",
		Version:      "2.0.0",
		DefaultValue: strconv.Itoa(DefaultBuildNumThreadsRatio),
	}
	p.BuildNumThreadsRatio.Init(base.mgr)

	p.SearchCacheBudgetGBRatio = ParamItem{
		Key:          "common.DiskIndex.SearchCacheBudgetGBRatio",
		Version:      "2.0.0",
		DefaultValue: fmt.Sprintf("%f", DefaultSearchCacheBudgetGBRatio),
	}
	p.SearchCacheBudgetGBRatio.Init(base.mgr)

	p.LoadNumThreadRatio = ParamItem{
		Key:          "common.DiskIndex.LoadNumThreadRatio",
		Version:      "2.0.0",
		DefaultValue: strconv.Itoa(DefaultLoadNumThreadRatio),
	}
	p.LoadNumThreadRatio.Init(base.mgr)

	p.GracefulStopTimeout = ParamItem{
		Key:          "common.gracefulStopTimeout",
		Version:      "2.2.1",
		DefaultValue: "30",
	}
	p.GracefulStopTimeout.Init(base.mgr)

	p.TopKLimit = ParamItem{
		Key:          "common.topKLimit",
		Version:      "2.2.1",
		DefaultValue: "16384",
	}
	p.TopKLimit.Init(base.mgr)

	p.BeamWidthRatio = ParamItem{
		Key:          "common.DiskIndex.BeamWidthRatio",
		Version:      "2.0.0",
		DefaultValue: strconv.Itoa(DefaultBeamWidthRatio),
	}
	p.BeamWidthRatio.Init(base.mgr)

	p.GracefulTime = ParamItem{
		Key:          "common.gracefulTime",
		Version:      "2.0.0",
		DefaultValue: strconv.Itoa(DefaultGracefulTime),
	}
	p.GracefulTime.Init(base.mgr)

	p.StorageType = ParamItem{
		Key:          "common.storageType",
		Version:      "2.0.0",
		DefaultValue: "minio",
	}
	p.StorageType.Init(base.mgr)

	p.ThreadCoreCoefficient = ParamItem{
		Key:          "common.threadCoreCoefficient",
		Version:      "2.0.0",
		DefaultValue: strconv.Itoa(DefaultThreadCoreCoefficient),
	}
	p.ThreadCoreCoefficient.Init(base.mgr)

	p.AuthorizationEnabled = ParamItem{
		Key:          "common.security.authorizationEnabled",
		Version:      "2.0.0",
		DefaultValue: "false",
	}
	p.AuthorizationEnabled.Init(base.mgr)

	p.SuperUsers = ParamItem{
		Key:     "common.security.superUsers",
		Version: "2.2.1",
	}
	p.SuperUsers.Init(base.mgr)

	p.ClusterName = ParamItem{
		Key:          "common.cluster.name",
		Version:      "2.0.0",
		DefaultValue: "",
	}
	p.ClusterName.Init(base.mgr)

	p.SessionTTL = ParamItem{
		Key:          "common.session.ttl",
		Version:      "2.0.0",
		DefaultValue: "60",
	}
	p.SessionTTL.Init(base.mgr)

	p.SessionRetryTimes = ParamItem{
		Key:          "common.session.retryTimes",
		Version:      "2.0.0",
		DefaultValue: "30",
	}
	p.SessionRetryTimes.Init(base.mgr)

}

// /////////////////////////////////////////////////////////////////////////////
// --- rootcoord ---
type rootCoordConfig struct {
	DmlChannelNum               ParamItem
	MaxPartitionNum             ParamItem
	MinSegmentSizeToEnableIndex ParamItem
	ImportTaskExpiration        ParamItem
	ImportTaskRetention         ParamItem
	ImportTaskSubPath           ParamItem
	// CreatedTime                 ParamItem
	// UpdatedTime                 ParamItem
	EnableActiveStandby ParamItem
}

func (p *rootCoordConfig) init(base *BaseTable) {
	p.DmlChannelNum = ParamItem{
		Key:          "rootCoord.dmlChannelNum",
		Version:      "2.0.0",
		DefaultValue: "256",
	}
	p.DmlChannelNum.Init(base.mgr)

	p.MaxPartitionNum = ParamItem{
		Key:          "rootCoord.maxPartitionNum",
		Version:      "2.0.0",
		DefaultValue: "4096",
	}
	p.MaxPartitionNum.Init(base.mgr)

	p.MinSegmentSizeToEnableIndex = ParamItem{
		Key:          "rootCoord.minSegmentSizeToEnableIndex",
		Version:      "2.0.0",
		DefaultValue: "1024",
	}
	p.MinSegmentSizeToEnableIndex.Init(base.mgr)

	p.ImportTaskExpiration = ParamItem{
		Key:          "rootCoord.importTaskExpiration",
		Version:      "2.2.0",
		DefaultValue: "15",
	}
	p.ImportTaskExpiration.Init(base.mgr)

	p.ImportTaskRetention = ParamItem{
		Key:          "rootCoord.importTaskRetention",
		Version:      "2.2.0",
		DefaultValue: strconv.Itoa(24 * 60 * 60),
	}
	p.ImportTaskRetention.Init(base.mgr)

	p.ImportTaskSubPath = ParamItem{
		Key:          "rootCoord.ImportTaskSubPath",
		Version:      "2.2.0",
		DefaultValue: "importtask",
	}
	p.ImportTaskSubPath.Init(base.mgr)

	p.EnableActiveStandby = ParamItem{
		Key:          "rootCoord.enableActiveStandby",
		Version:      "2.2.0",
		DefaultValue: "false",
	}
	p.EnableActiveStandby.Init(base.mgr)

}

// /////////////////////////////////////////////////////////////////////////////
// --- proxy ---
type AccessLogConfig struct {
	// if use access log
	Enable ParamItem
	// if upload sealed access log file to minio
	MinioEnable ParamItem
	// Log path
	LocalPath ParamItem
	// Log filename, leave empty to disable file log.
	Filename ParamItem
	// Max size for a single file, in MB.
	MaxSize ParamItem
	// Max time for single access log file in seconds
	RotatedTime ParamItem
	// Maximum number of old log files to retain.
	MaxBackups ParamItem
	//File path in minIO
	RemotePath ParamItem
	//Max time for log file in minIO, in hours
	RemoteMaxTime ParamItem
}

type proxyConfig struct {
	// Alias  string
	SoPath ParamItem

	TimeTickInterval         ParamItem
	MsgStreamTimeTickBufSize ParamItem
	MaxNameLength            ParamItem
	MaxUsernameLength        ParamItem
	MinPasswordLength        ParamItem
	MaxPasswordLength        ParamItem
	MaxFieldNum              ParamItem
	MaxShardNum              ParamItem
	MaxDimension             ParamItem
	GinLogging               ParamItem
	MaxUserNum               ParamItem
	MaxRoleNum               ParamItem
	AccessLog                AccessLogConfig

	// required from QueryCoord
	SearchResultChannelNames   ParamItem
	RetrieveResultChannelNames ParamItem

	MaxTaskNum ParamItem
}

func (p *proxyConfig) init(base *BaseTable) {
	p.TimeTickInterval = ParamItem{
		Key:          "proxy.timeTickInterval",
		Version:      "2.2.0",
		DefaultValue: "200",
		PanicIfEmpty: true,
	}
	p.TimeTickInterval.Init(base.mgr)

	p.MsgStreamTimeTickBufSize = ParamItem{
		Key:          "proxy.msgStream.timeTick.bufSize",
		Version:      "2.2.0",
		DefaultValue: "512",
		PanicIfEmpty: true,
	}
	p.MsgStreamTimeTickBufSize.Init(base.mgr)

	p.MaxNameLength = ParamItem{
		Key:          "proxy.maxNameLength",
		DefaultValue: "255",
		Version:      "2.0.0",
		PanicIfEmpty: true,
	}
	p.MaxNameLength.Init(base.mgr)

	p.MinPasswordLength = ParamItem{
		Key:          "proxy.minPasswordLength",
		DefaultValue: "6",
		Version:      "2.0.0",
		PanicIfEmpty: true,
	}
	p.MinPasswordLength.Init(base.mgr)

	p.MaxUsernameLength = ParamItem{
		Key:          "proxy.maxUsernameLength",
		DefaultValue: "32",
		Version:      "2.0.0",
		PanicIfEmpty: true,
	}
	p.MaxUsernameLength.Init(base.mgr)

	p.MaxPasswordLength = ParamItem{
		Key:          "proxy.maxPasswordLength",
		DefaultValue: "256",
		Version:      "2.0.0",
		PanicIfEmpty: true,
	}
	p.MaxPasswordLength.Init(base.mgr)

	p.MaxFieldNum = ParamItem{
		Key:          "proxy.maxFieldNum",
		DefaultValue: "64",
		Version:      "2.0.0",
		PanicIfEmpty: true,
	}
	p.MaxFieldNum.Init(base.mgr)

	p.MaxShardNum = ParamItem{
		Key:          "proxy.maxShardNum",
		DefaultValue: "256",
		Version:      "2.0.0",
		PanicIfEmpty: true,
	}
	p.MaxShardNum.Init(base.mgr)

	p.MaxDimension = ParamItem{
		Key:          "proxy.maxDimension",
		DefaultValue: "32768",
		Version:      "2.0.0",
		PanicIfEmpty: true,
	}
	p.MaxDimension.Init(base.mgr)

	p.MaxTaskNum = ParamItem{
		Key:          "proxy.maxTaskNum",
		Version:      "2.2.0",
		DefaultValue: "1024",
	}
	p.MaxTaskNum.Init(base.mgr)

	p.GinLogging = ParamItem{
		Key:          "proxy.ginLogging",
		Version:      "2.2.0",
		DefaultValue: "true",
	}
	p.GinLogging.Init(base.mgr)

	p.MaxUserNum = ParamItem{
		Key:          "proxy.maxUserNum",
		DefaultValue: "100",
		Version:      "2.0.0",
		PanicIfEmpty: true,
	}
	p.MaxUserNum.Init(base.mgr)

	p.MaxRoleNum = ParamItem{
		Key:          "proxy.maxRoleNum",
		DefaultValue: "10",
		Version:      "2.0.0",
		PanicIfEmpty: true,
	}
	p.MaxRoleNum.Init(base.mgr)

	p.SoPath = ParamItem{
		Key:          "proxy.soPath",
		Version:      "2.2.0",
		DefaultValue: "",
	}
	p.SoPath.Init(base.mgr)

	p.AccessLog.Enable = ParamItem{
		Key:          "proxy.accessLog.enable",
		Version:      "2.2.0",
		DefaultValue: "true",
	}
	p.AccessLog.Enable.Init(base.mgr)

	p.AccessLog.MinioEnable = ParamItem{
		Key:          "proxy.accessLog.minioEnable",
		Version:      "2.2.0",
		DefaultValue: "false",
	}
	p.AccessLog.MinioEnable.Init(base.mgr)

	p.AccessLog.LocalPath = ParamItem{
		Key:     "proxy.accessLog.localPath",
		Version: "2.2.0",
	}
	p.AccessLog.LocalPath.Init(base.mgr)

	p.AccessLog.Filename = ParamItem{
		Key:          "proxy.accessLog.filename",
		Version:      "2.2.0",
		DefaultValue: "milvus_access_log.log",
	}
	p.AccessLog.Filename.Init(base.mgr)

	p.AccessLog.MaxSize = ParamItem{
		Key:          "proxy.accessLog.maxSize",
		Version:      "2.2.0",
		DefaultValue: "64",
	}
	p.AccessLog.MaxSize.Init(base.mgr)

	p.AccessLog.MaxBackups = ParamItem{
		Key:          "proxy.accessLog.maxBackups",
		Version:      "2.2.0",
		DefaultValue: "8",
	}
	p.AccessLog.MaxBackups.Init(base.mgr)

	p.AccessLog.RotatedTime = ParamItem{
		Key:          "proxy.accessLog.rotatedTime",
		Version:      "2.2.0",
		DefaultValue: "3600",
	}
	p.AccessLog.RotatedTime.Init(base.mgr)

	p.AccessLog.RemotePath = ParamItem{
		Key:          "proxy.accessLog.remotePath",
		Version:      "2.2.0",
		DefaultValue: "access_log/",
	}
	p.AccessLog.RemotePath.Init(base.mgr)

	p.AccessLog.RemoteMaxTime = ParamItem{
		Key:          "proxy.accessLog.remoteMaxTime",
		Version:      "2.2.0",
		DefaultValue: "168",
	}
	p.AccessLog.RemoteMaxTime.Init(base.mgr)
}

// /////////////////////////////////////////////////////////////////////////////
// --- querycoord ---
type queryCoordConfig struct {
	//---- Task ---
	RetryNum         ParamItem
	RetryInterval    ParamItem
	TaskMergeCap     ParamItem
	TaskExecutionCap ParamItem

	//---- Handoff ---
	AutoHandoff ParamItem

	//---- Balance ---
	AutoBalance                         ParamItem
	OverloadedMemoryThresholdPercentage ParamItem
	BalanceIntervalSeconds              ParamItem
	MemoryUsageMaxDifferencePercentage  ParamItem
	CheckInterval                       ParamItem
	ChannelTaskTimeout                  ParamItem
	SegmentTaskTimeout                  ParamItem
	DistPullInterval                    ParamItem
	HeartbeatAvailableInterval          ParamItem
	LoadTimeoutSeconds                  ParamItem
	CheckHandoffInterval                ParamItem
	EnableActiveStandby                 ParamItem

	NextTargetSurviveTime    ParamItem
	UpdateNextTargetInterval ParamItem
}

func (p *queryCoordConfig) init(base *BaseTable) {
	//---- Task ---
	p.RetryNum = ParamItem{
		Key:          "queryCoord.task.retrynum",
		Version:      "2.2.0",
		DefaultValue: "5",
	}
	p.RetryNum.Init(base.mgr)

	p.RetryInterval = ParamItem{
		Key:          "queryCoord.task.retryinterval",
		Version:      "2.2.0",
		DefaultValue: strconv.FormatInt(int64(10*time.Second), 10),
	}
	p.RetryInterval.Init(base.mgr)

	p.TaskMergeCap = ParamItem{
		Key:          "queryCoord.taskMergeCap",
		Version:      "2.2.0",
		DefaultValue: "16",
	}
	p.TaskMergeCap.Init(base.mgr)

	p.TaskExecutionCap = ParamItem{
		Key:          "queryCoord.taskExecutionCap",
		Version:      "2.2.0",
		DefaultValue: "256",
	}
	p.TaskExecutionCap.Init(base.mgr)

	p.AutoHandoff = ParamItem{
		Key:          "queryCoord.autoHandoff",
		Version:      "2.0.0",
		DefaultValue: "true",
		PanicIfEmpty: true,
	}
	p.AutoHandoff.Init(base.mgr)

	p.AutoBalance = ParamItem{
		Key:          "queryCoord.autoBalance",
		Version:      "2.0.0",
		DefaultValue: "false",
		PanicIfEmpty: true,
	}
	p.AutoBalance.Init(base.mgr)

	p.OverloadedMemoryThresholdPercentage = ParamItem{
		Key:          "queryCoord.overloadedMemoryThresholdPercentage",
		Version:      "2.0.0",
		DefaultValue: "90",
		PanicIfEmpty: true,
	}
	p.OverloadedMemoryThresholdPercentage.Init(base.mgr)

	p.BalanceIntervalSeconds = ParamItem{
		Key:          "queryCoord.balanceIntervalSeconds",
		Version:      "2.0.0",
		DefaultValue: "60",
		PanicIfEmpty: true,
	}
	p.BalanceIntervalSeconds.Init(base.mgr)

	p.MemoryUsageMaxDifferencePercentage = ParamItem{
		Key:          "queryCoord.memoryUsageMaxDifferencePercentage",
		Version:      "2.0.0",
		DefaultValue: "30",
		PanicIfEmpty: true,
	}
	p.MemoryUsageMaxDifferencePercentage.Init(base.mgr)

	p.CheckInterval = ParamItem{
		Key:          "queryCoord.checkInterval",
		Version:      "2.0.0",
		DefaultValue: "1000",
		PanicIfEmpty: true,
	}
	p.CheckInterval.Init(base.mgr)

	p.ChannelTaskTimeout = ParamItem{
		Key:          "queryCoord.channelTaskTimeout",
		Version:      "2.0.0",
		DefaultValue: "60000",
		PanicIfEmpty: true,
	}
	p.ChannelTaskTimeout.Init(base.mgr)

	p.SegmentTaskTimeout = ParamItem{
		Key:          "queryCoord.segmentTaskTimeout",
		Version:      "2.0.0",
		DefaultValue: "120000",
		PanicIfEmpty: true,
	}
	p.SegmentTaskTimeout.Init(base.mgr)

	p.DistPullInterval = ParamItem{
		Key:          "queryCoord.distPullInterval",
		Version:      "2.0.0",
		DefaultValue: "500",
		PanicIfEmpty: true,
	}
	p.DistPullInterval.Init(base.mgr)

	p.LoadTimeoutSeconds = ParamItem{
		Key:          "queryCoord.loadTimeoutSeconds",
		Version:      "2.0.0",
		DefaultValue: "600",
		PanicIfEmpty: true,
	}
	p.LoadTimeoutSeconds.Init(base.mgr)

	p.HeartbeatAvailableInterval = ParamItem{
		Key:          "queryCoord.heartbeatAvailableInterval",
		Version:      "2.2.1",
		DefaultValue: "10000",
		PanicIfEmpty: true,
	}
	p.HeartbeatAvailableInterval.Init(base.mgr)

	p.EnableActiveStandby = ParamItem{
		Key:          "queryCoord.enableActiveStandby",
		Version:      "2.2.0",
		DefaultValue: "false",
	}
	p.EnableActiveStandby.Init(base.mgr)

	p.NextTargetSurviveTime = ParamItem{
		Key:          "queryCoord.NextTargetSurviveTime",
		Version:      "2.0.0",
		DefaultValue: "300",
		PanicIfEmpty: true,
	}
	p.NextTargetSurviveTime.Init(base.mgr)

	p.UpdateNextTargetInterval = ParamItem{
		Key:          "queryCoord.UpdateNextTargetInterval",
		Version:      "2.0.0",
		DefaultValue: "10",
		PanicIfEmpty: true,
	}
	p.UpdateNextTargetInterval.Init(base.mgr)
}

// /////////////////////////////////////////////////////////////////////////////
// --- querynode ---
type queryNodeConfig struct {
	FlowGraphMaxQueueLength ParamItem
	FlowGraphMaxParallelism ParamItem

	// stats
	StatsPublishInterval ParamItem

	SliceIndex ParamItem

	// segcore
	ChunkRows        ParamItem
	SmallIndexNlist  ParamItem
	SmallIndexNProbe ParamItem

	CreatedTime ParamItem
	UpdatedTime ParamItem

	// memory limit
	LoadMemoryUsageFactor               ParamItem
	OverloadedMemoryThresholdPercentage ParamItem

	// enable disk
	EnableDisk             ParamItem
	DiskCapacityLimit      ParamItem
	MaxDiskUsagePercentage ParamItem

	// cache limit
	CacheEnabled     ParamItem
	CacheMemoryLimit ParamItem

	GroupEnabled         ParamItem
	MaxReceiveChanSize   ParamItem
	MaxUnsolvedQueueSize ParamItem
	MaxReadConcurrency   ParamItem
	MaxGroupNQ           ParamItem
	TopKMergeRatio       ParamItem
	CPURatio             ParamItem

	GCHelperEnabled     ParamItem
	MinimumGOGCConfig   ParamItem
	MaximumGOGCConfig   ParamItem
	GracefulStopTimeout ParamItem
}

func (p *queryNodeConfig) init(base *BaseTable) {
	p.FlowGraphMaxQueueLength = ParamItem{
		Key:          "queryNode.dataSync.flowGraph.maxQueueLength",
		Version:      "2.0.0",
		DefaultValue: "1024",
	}
	p.FlowGraphMaxQueueLength.Init(base.mgr)

	p.FlowGraphMaxParallelism = ParamItem{
		Key:          "queryNode.dataSync.flowGraph.maxParallelism",
		Version:      "2.0.0",
		DefaultValue: "1024",
	}
	p.FlowGraphMaxParallelism.Init(base.mgr)

	p.StatsPublishInterval = ParamItem{
		Key:          "queryNode.stats.publishInterval",
		Version:      "2.0.0",
		DefaultValue: "1000",
	}
	p.StatsPublishInterval.Init(base.mgr)

	p.ChunkRows = ParamItem{
		Key:          "queryNode.segcore.chunkRows",
		Version:      "2.0.0",
		DefaultValue: "1024",
		Formatter: func(v string) string {
			if getAsInt(v) < 1024 {
				return "1024"
			}
			return v
		},
	}
	p.ChunkRows.Init(base.mgr)

	p.SmallIndexNlist = ParamItem{
		Key:     "queryNode.segcore.smallIndex.nlist",
		Version: "2.0.0",
		Formatter: func(v string) string {
			rows := p.ChunkRows.GetAsInt64()
			var defaultNList int64
			for i := int64(0); i < rows; i++ {
				if math.Pow(2.0, float64(i)) > math.Sqrt(float64(rows)) {
					defaultNList = int64(math.Pow(2, float64(i)))
					break
				}
			}

			nlist := getAsInt64(v)
			if nlist == 0 {
				nlist = defaultNList
			}
			if nlist > rows/8 {
				return strconv.FormatInt(rows/8, 10)
			}
			return strconv.FormatInt(nlist, 10)
		},
	}
	p.SmallIndexNlist.Init(base.mgr)

	p.SmallIndexNProbe = ParamItem{
		Key:     "queryNode.segcore.smallIndex.nprobe",
		Version: "2.0.0",
		Formatter: func(v string) string {
			defaultNprobe := p.SmallIndexNlist.GetAsInt64() / 16
			nprobe := getAsInt64(v)
			if nprobe == 0 {
				nprobe = defaultNprobe
			}
			if nprobe > p.SmallIndexNlist.GetAsInt64() {
				return p.SmallIndexNlist.GetValue()
			}
			return strconv.FormatInt(nprobe, 10)
		},
	}
	p.SmallIndexNProbe.Init(base.mgr)

	p.LoadMemoryUsageFactor = ParamItem{
		Key:          "queryNode.loadMemoryUsageFactor",
		Version:      "2.0.0",
		DefaultValue: "3",
		PanicIfEmpty: true,
	}
	p.LoadMemoryUsageFactor.Init(base.mgr)

	p.OverloadedMemoryThresholdPercentage = ParamItem{
		Key:          "queryCoord.overloadedMemoryThresholdPercentage",
		Version:      "2.0.0",
		DefaultValue: "90",
		PanicIfEmpty: true,
		Formatter: func(v string) string {
			return fmt.Sprintf("%f", getAsFloat(v)/100)
		},
	}
	p.OverloadedMemoryThresholdPercentage.Init(base.mgr)

	p.CacheMemoryLimit = ParamItem{
		Key:          "queryNode.cache.memoryLimit",
		Version:      "2.0.0",
		DefaultValue: "2147483648",
		PanicIfEmpty: true,
	}
	p.CacheMemoryLimit.Init(base.mgr)

	p.CacheEnabled = ParamItem{
		Key:          "queryNode.cache.enabled",
		Version:      "2.0.0",
		DefaultValue: "",
	}
	p.CacheEnabled.Init(base.mgr)

	p.GroupEnabled = ParamItem{
		Key:          "queryNode.grouping.enabled",
		Version:      "2.0.0",
		DefaultValue: "true",
	}
	p.GroupEnabled.Init(base.mgr)

	p.MaxReceiveChanSize = ParamItem{
		Key:          "queryNode.scheduler.receiveChanSize",
		Version:      "2.0.0",
		DefaultValue: "10240",
	}
	p.MaxReceiveChanSize.Init(base.mgr)

	p.MaxReadConcurrency = ParamItem{
		Key:          "queryNode.scheduler.maxReadConcurrentRatio",
		Version:      "2.0.0",
		DefaultValue: "2.0",
		Formatter: func(v string) string {
			ratio := getAsFloat(v)
			cpuNum := int64(runtime.GOMAXPROCS(0))
			concurrency := int64(float64(cpuNum) * ratio)
			if concurrency < 1 {
				return "1" // MaxReadConcurrency must >= 1
			} else if concurrency > cpuNum*100 {
				return strconv.FormatInt(cpuNum*100, 10) // MaxReadConcurrency must <= 100*cpuNum
			}
			return strconv.FormatInt(concurrency, 10)
		},
	}
	p.MaxReadConcurrency.Init(base.mgr)

	p.MaxUnsolvedQueueSize = ParamItem{
		Key:          "queryNode.scheduler.unsolvedQueueSize",
		Version:      "2.0.0",
		DefaultValue: "10240",
	}
	p.MaxUnsolvedQueueSize.Init(base.mgr)

	p.MaxGroupNQ = ParamItem{
		Key:          "queryNode.grouping.maxNQ",
		Version:      "2.0.0",
		DefaultValue: "1000",
	}
	p.MaxGroupNQ.Init(base.mgr)

	p.TopKMergeRatio = ParamItem{
		Key:          "queryNode.grouping.topKMergeRatio",
		Version:      "2.0.0",
		DefaultValue: "10.0",
	}
	p.TopKMergeRatio.Init(base.mgr)

	p.CPURatio = ParamItem{
		Key:          "queryNode.scheduler.cpuRatio",
		Version:      "2.0.0",
		DefaultValue: "10",
	}
	p.CPURatio.Init(base.mgr)

	p.EnableDisk = ParamItem{
		Key:          "queryNode.enableDisk",
		Version:      "2.2.0",
		DefaultValue: "false",
	}
	p.EnableDisk.Init(base.mgr)

	p.DiskCapacityLimit = ParamItem{
		Key:     "LOCAL_STORAGE_SIZE",
		Version: "2.2.0",
		Formatter: func(v string) string {
			if len(v) == 0 {
				diskUsage, err := disk.Usage("/")
				if err != nil {
					panic(err)
				}
				return strconv.FormatUint(diskUsage.Total, 10)
			}
			diskSize := getAsInt64(v)
			return strconv.FormatInt(diskSize*1024*1024*1024, 10)
		},
	}
	p.DiskCapacityLimit.Init(base.mgr)

	p.MaxDiskUsagePercentage = ParamItem{
		Key:          "queryNode.maxDiskUsagePercentage",
		Version:      "2.2.0",
		DefaultValue: "95",
		PanicIfEmpty: true,
		Formatter: func(v string) string {
			return fmt.Sprintf("%f", getAsFloat(v)/100)
		},
	}
	p.MaxDiskUsagePercentage.Init(base.mgr)

	p.GCHelperEnabled = ParamItem{
		Key:          "queryNode.gchelper.enabled",
		Version:      "2.0.0",
		DefaultValue: "true",
	}
	p.GCHelperEnabled.Init(base.mgr)

	p.MaximumGOGCConfig = ParamItem{
		Key:          "queryNode.gchelper.maximumGoGC",
		Version:      "2.0.0",
		DefaultValue: "200",
	}
	p.MaximumGOGCConfig.Init(base.mgr)

	p.MinimumGOGCConfig = ParamItem{
		Key:          "queryNode.gchelper.minimumGoGC",
		Version:      "2.0.0",
		DefaultValue: "30",
	}
	p.MinimumGOGCConfig.Init(base.mgr)

	p.GracefulStopTimeout = ParamItem{
		Key:          "queryNode.gracefulStopTimeout",
		Version:      "2.2.1",
		FallbackKeys: []string{"common.gracefulStopTimeout"},
	}
	p.GracefulStopTimeout.Init(base.mgr)
}

// /////////////////////////////////////////////////////////////////////////////
// --- datacoord ---
type dataCoordConfig struct {

	// --- CHANNEL ---
	MaxWatchDuration ParamItem

	// --- SEGMENTS ---
	SegmentMaxSize                 ParamItem
	DiskSegmentMaxSize             ParamItem
	SegmentSealProportion          ParamItem
	SegAssignmentExpiration        ParamItem
	SegmentMaxLifetime             ParamItem
	SegmentMaxIdleTime             ParamItem
	SegmentMinSizeFromIdleToSealed ParamItem

	// compaction
	EnableCompaction     ParamItem
	EnableAutoCompaction ParamItem

	MinSegmentToMerge                 ParamItem
	MaxSegmentToMerge                 ParamItem
	SegmentSmallProportion            ParamItem
	SegmentCompactableProportion      ParamItem
	SegmentExpansionRate              ParamItem
	CompactionTimeoutInSeconds        ParamItem
	CompactionCheckIntervalInSeconds  ParamItem
	SingleCompactionRatioThreshold    ParamItem
	SingleCompactionDeltaLogMaxSize   ParamItem
	SingleCompactionExpiredLogMaxSize ParamItem
	SingleCompactionDeltalogMaxNum    ParamItem
	GlobalCompactionInterval          ParamItem

	// Garbage Collection
	EnableGarbageCollection ParamItem
	GCInterval              ParamItem
	GCMissingTolerance      ParamItem
	GCDropTolerance         ParamItem
	EnableActiveStandby     ParamItem
}

func (p *dataCoordConfig) init(base *BaseTable) {

	p.MaxWatchDuration = ParamItem{
		Key:          "dataCoord.channel.maxWatchDuration",
		Version:      "2.2.1",
		DefaultValue: "60",
	}
	p.MaxWatchDuration.Init(base.mgr)

	p.SegmentMaxSize = ParamItem{
		Key:          "dataCoord.segment.maxSize",
		Version:      "2.0.0",
		DefaultValue: "512",
	}
	p.SegmentMaxSize.Init(base.mgr)

	p.DiskSegmentMaxSize = ParamItem{
		Key:          "dataCoord.segment.diskSegmentMaxSize",
		Version:      "2.0.0",
		DefaultValue: "512",
	}
	p.DiskSegmentMaxSize.Init(base.mgr)

	p.SegmentSealProportion = ParamItem{
		Key:          "dataCoord.segment.sealProportion",
		Version:      "2.0.0",
		DefaultValue: "0.25",
	}
	p.SegmentSealProportion.Init(base.mgr)

	p.SegAssignmentExpiration = ParamItem{
		Key:          "dataCoord.segment.assignmentExpiration",
		Version:      "2.0.0",
		DefaultValue: "2000",
	}
	p.SegAssignmentExpiration.Init(base.mgr)

	p.SegmentMaxLifetime = ParamItem{
		Key:          "dataCoord.segment.maxLife",
		Version:      "2.0.0",
		DefaultValue: "86400",
	}
	p.SegmentMaxLifetime.Init(base.mgr)

	p.SegmentMaxIdleTime = ParamItem{
		Key:          "dataCoord.segment.maxIdleTime",
		Version:      "2.0.0",
		DefaultValue: "3600",
	}
	p.SegmentMaxIdleTime.Init(base.mgr)

	p.SegmentMinSizeFromIdleToSealed = ParamItem{
		Key:          "dataCoord.segment.minSizeFromIdleToSealed",
		Version:      "2.0.0",
		DefaultValue: "16.0",
	}
	p.SegmentMinSizeFromIdleToSealed.Init(base.mgr)

	p.EnableCompaction = ParamItem{
		Key:          "dataCoord.enableCompaction",
		Version:      "2.0.0",
		DefaultValue: "false",
	}
	p.EnableCompaction.Init(base.mgr)

	p.EnableAutoCompaction = ParamItem{
		Key:          "dataCoord.compaction.enableAutoCompaction",
		Version:      "2.0.0",
		DefaultValue: "false",
	}
	p.EnableAutoCompaction.Init(base.mgr)

	p.MinSegmentToMerge = ParamItem{
		Key:          "dataCoord.compaction.min.segment",
		Version:      "2.0.0",
		DefaultValue: "3",
	}
	p.MinSegmentToMerge.Init(base.mgr)

	p.MaxSegmentToMerge = ParamItem{
		Key:          "dataCoord.compaction.max.segment",
		Version:      "2.0.0",
		DefaultValue: "30",
	}
	p.MaxSegmentToMerge.Init(base.mgr)

	p.SegmentSmallProportion = ParamItem{
		Key:          "dataCoord.segment.smallProportion",
		Version:      "2.0.0",
		DefaultValue: "0.5",
	}
	p.SegmentSmallProportion.Init(base.mgr)

	p.SegmentCompactableProportion = ParamItem{
		Key:          "dataCoord.segment.compactableProportion",
		Version:      "2.2.1",
		DefaultValue: "0.5",
	}
	p.SegmentCompactableProportion.Init(base.mgr)

	p.SegmentExpansionRate = ParamItem{
		Key:          "dataCoord.segment.expansionRate",
		Version:      "2.2.1",
		DefaultValue: "1.25",
	}
	p.SegmentExpansionRate.Init(base.mgr)

	p.CompactionTimeoutInSeconds = ParamItem{
		Key:          "dataCoord.compaction.timeout",
		Version:      "2.0.0",
		DefaultValue: "180",
	}
	p.CompactionTimeoutInSeconds.Init(base.mgr)

	p.CompactionCheckIntervalInSeconds = ParamItem{
		Key:          "dataCoord.compaction.check.interval",
		Version:      "2.0.0",
		DefaultValue: "10",
	}
	p.CompactionCheckIntervalInSeconds.Init(base.mgr)

	p.SingleCompactionRatioThreshold = ParamItem{
		Key:          "dataCoord.compaction.single.ratio.threshold",
		Version:      "2.0.0",
		DefaultValue: "0.2",
	}
	p.SingleCompactionRatioThreshold.Init(base.mgr)

	p.SingleCompactionDeltaLogMaxSize = ParamItem{
		Key:          "dataCoord.compaction.single.deltalog.maxsize",
		Version:      "2.0.0",
		DefaultValue: strconv.Itoa(2 * 1024 * 1024),
	}
	p.SingleCompactionDeltaLogMaxSize.Init(base.mgr)

	p.SingleCompactionExpiredLogMaxSize = ParamItem{
		Key:          "dataCoord.compaction.single.expiredlog.maxsize",
		Version:      "2.0.0",
		DefaultValue: "10485760",
	}
	p.SingleCompactionExpiredLogMaxSize.Init(base.mgr)

	p.SingleCompactionDeltalogMaxNum = ParamItem{
		Key:          "dataCoord.compaction.single.deltalog.maxnum",
		Version:      "2.0.0",
		DefaultValue: "1000",
	}
	p.SingleCompactionDeltalogMaxNum.Init(base.mgr)

	p.GlobalCompactionInterval = ParamItem{
		Key:          "dataCoord.compaction.global.interval",
		Version:      "2.0.0",
		DefaultValue: "60",
	}
	p.GlobalCompactionInterval.Init(base.mgr)

	p.EnableGarbageCollection = ParamItem{
		Key:          "dataCoord.enableGarbageCollection",
		Version:      "2.0.0",
		DefaultValue: "true",
	}
	p.EnableGarbageCollection.Init(base.mgr)

	p.GCInterval = ParamItem{
		Key:          "dataCoord.gc.interval",
		Version:      "2.0.0",
		DefaultValue: "3600",
	}
	p.GCInterval.Init(base.mgr)

	p.GCMissingTolerance = ParamItem{
		Key:          "dataCoord.gc.missingTolerance",
		Version:      "2.0.0",
		DefaultValue: "86400",
	}
	p.GCMissingTolerance.Init(base.mgr)

	p.GCDropTolerance = ParamItem{
		Key:          "dataCoord.gc.dropTolerance",
		Version:      "2.0.0",
		DefaultValue: "86400",
	}
	p.GCDropTolerance.Init(base.mgr)

	p.EnableActiveStandby = ParamItem{
		Key:          "dataCoord.enableActiveStandby",
		Version:      "2.0.0",
		DefaultValue: "false",
	}
	p.EnableActiveStandby.Init(base.mgr)
}

// /////////////////////////////////////////////////////////////////////////////
// --- datanode ---
type dataNodeConfig struct {
	FlowGraphMaxQueueLength ParamItem
	FlowGraphMaxParallelism ParamItem

	// segment
	FlushInsertBufferSize  ParamItem
	FlushDeleteBufferBytes ParamItem
	BinLogMaxSize          ParamItem
	SyncPeriod             ParamItem

	// io concurrency to fetch stats logs
	IOConcurrency ParamItem
}

func (p *dataNodeConfig) init(base *BaseTable) {
	p.FlowGraphMaxQueueLength = ParamItem{
		Key:          "dataNode.dataSync.flowGraph.maxQueueLength",
		Version:      "2.0.0",
		DefaultValue: "1024",
	}
	p.FlowGraphMaxQueueLength.Init(base.mgr)

	p.FlowGraphMaxParallelism = ParamItem{
		Key:          "dataNode.dataSync.flowGraph.maxParallelism",
		Version:      "2.0.0",
		DefaultValue: "1024",
	}
	p.FlowGraphMaxParallelism.Init(base.mgr)

	p.FlushInsertBufferSize = ParamItem{
		Key:          "DATA_NODE_IBUFSIZE",
		Version:      "2.0.0",
		FallbackKeys: []string{"datanode.segment.insertBufSize"},
		DefaultValue: "16777216",
		PanicIfEmpty: true,
	}
	p.FlushInsertBufferSize.Init(base.mgr)

	p.FlushDeleteBufferBytes = ParamItem{
		Key:          "datanode.segment.deleteBufBytes",
		Version:      "2.0.0",
		DefaultValue: "67108864",
	}
	p.FlushDeleteBufferBytes.Init(base.mgr)

	p.BinLogMaxSize = ParamItem{
		Key:          "datanode.segment.binlog.maxsize",
		Version:      "2.0.0",
		DefaultValue: "67108864",
	}
	p.BinLogMaxSize.Init(base.mgr)

	p.SyncPeriod = ParamItem{
		Key:          "datanode.segment.syncPeriod",
		Version:      "2.0.0",
		DefaultValue: "600",
	}
	p.SyncPeriod.Init(base.mgr)

	p.IOConcurrency = ParamItem{
		Key:          "dataNode.dataSync.ioConcurrency",
		Version:      "2.0.0",
		DefaultValue: "10",
	}
	p.IOConcurrency.Init(base.mgr)

}

// /////////////////////////////////////////////////////////////////////////////
// --- indexcoord ---
type indexCoordConfig struct {
	BindIndexNodeMode ParamItem
	IndexNodeAddress  ParamItem
	WithCredential    ParamItem
	IndexNodeID       ParamItem

	MinSegmentNumRowsToEnableIndex ParamItem

	GCInterval ParamItem

	EnableActiveStandby ParamItem
}

func (p *indexCoordConfig) init(base *BaseTable) {
	p.GCInterval = ParamItem{
		Key:          "indexCoord.gc.interval",
		Version:      "2.0.0",
		DefaultValue: "600",
	}
	p.GCInterval.Init(base.mgr)

	p.MinSegmentNumRowsToEnableIndex = ParamItem{
		Key:          "indexCoord.minSegmentNumRowsToEnableIndex",
		Version:      "2.0.0",
		DefaultValue: "1024",
	}
	p.MinSegmentNumRowsToEnableIndex.Init(base.mgr)

	p.BindIndexNodeMode = ParamItem{
		Key:          "indexCoord.bindIndexNodeMode.enable",
		Version:      "2.0.0",
		DefaultValue: "false",
	}
	p.BindIndexNodeMode.Init(base.mgr)

	p.IndexNodeAddress = ParamItem{
		Key:          "indexCoord.bindIndexNodeMode.address",
		Version:      "2.0.0",
		DefaultValue: "localhost:22930",
	}
	p.IndexNodeAddress.Init(base.mgr)

	p.WithCredential = ParamItem{
		Key:          "indexCoord.bindIndexNodeMode.withCred",
		Version:      "2.0.0",
		DefaultValue: "false",
	}
	p.WithCredential.Init(base.mgr)

	p.IndexNodeID = ParamItem{
		Key:          "indexCoord.bindIndexNodeMode.nodeID",
		Version:      "2.0.0",
		DefaultValue: "0",
	}
	p.IndexNodeID.Init(base.mgr)

	p.EnableActiveStandby = ParamItem{
		Key:          "indexCoord.enableActiveStandby",
		Version:      "2.0.0",
		DefaultValue: "false",
	}
	p.EnableActiveStandby.Init(base.mgr)
}

// /////////////////////////////////////////////////////////////////////////////
// --- indexnode ---
type indexNodeConfig struct {
	BuildParallel ParamItem
	// enable disk
	EnableDisk             ParamItem
	DiskCapacityLimit      ParamItem
	MaxDiskUsagePercentage ParamItem

	GracefulStopTimeout ParamItem
}

func (p *indexNodeConfig) init(base *BaseTable) {
	p.BuildParallel = ParamItem{
		Key:          "indexNode.scheduler.buildParallel",
		Version:      "2.0.0",
		DefaultValue: "1",
	}
	p.BuildParallel.Init(base.mgr)

	p.EnableDisk = ParamItem{
		Key:          "indexNode.enableDisk",
		Version:      "2.2.0",
		DefaultValue: "false",
		PanicIfEmpty: true,
	}
	p.EnableDisk.Init(base.mgr)

	p.DiskCapacityLimit = ParamItem{
		Key:     "LOCAL_STORAGE_SIZE",
		Version: "2.2.0",
		Formatter: func(v string) string {
			if len(v) == 0 {
				diskUsage, err := disk.Usage("/")
				if err != nil {
					panic(err)
				}
				return strconv.FormatUint(diskUsage.Total, 10)
			}
			diskSize := getAsInt64(v)
			return strconv.FormatInt(diskSize*1024*1024*1024, 10)
		},
	}
	p.DiskCapacityLimit.Init(base.mgr)

	p.MaxDiskUsagePercentage = ParamItem{
		Key:          "indexNode.maxDiskUsagePercentage",
		Version:      "2.2.0",
		DefaultValue: "95",
		PanicIfEmpty: true,
		Formatter: func(v string) string {
			return fmt.Sprintf("%f", getAsFloat(v)/100)
		},
	}
	p.MaxDiskUsagePercentage.Init(base.mgr)

	p.GracefulStopTimeout = ParamItem{
		Key:          "indexNode.gracefulStopTimeout",
		Version:      "2.2.1",
		FallbackKeys: []string{"common.gracefulStopTimeout"},
	}
	p.GracefulStopTimeout.Init(base.mgr)
}