base

package
v1.0.1 Latest Latest
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 Go to latest Published: Jul 8, 2016 License: MIT Imports: 12 Imported by: 0

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Constants

View Source 
const (
	TableStatusRowsEstimate RowsEstimateMethod = "TableStatusRowsEstimate"
	ExplainRowsEstimate                        = "ExplainRowsEstimate"
	CountRowsEstimate                          = "CountRowsEstimate"
)
View Source 
const (
	CutOverAtomic  CutOver = iota
	CutOverSafe            = iota
	CutOverTwoStep         = iota
)

Variables

This section is empty.

Functions

func FileExists added in v0.7.2 

func FileExists(fileName string) bool

func PrettifyDurationOutput 

func PrettifyDurationOutput(d time.Duration) string

func StringContainsAll added in v0.9.6 

func StringContainsAll(s string, substrings ...string) bool

StringContainsAll returns true if `s` contains all non empty given `substrings` The function returns `false` if no non-empty arguments are given.

Types

type ContextConfig added in v0.7.16 

type ContextConfig struct {
	Client struct {
		User     string
		Password string
	}
	Osc struct {
		Chunk_Size            int64
		Max_Lag_Millis        int64
		Replication_Lag_Query string
		Max_Load              string
	}
}

type CutOver added in v0.8.3 

type CutOver int

type LoadMap added in v0.9.6 

type LoadMap map[string]int64

LoadMap is a mapping of status variable & threshold e.g. [Threads_connected: 100, Threads_running: 50]

func NewLoadMap added in v0.9.6 

func NewLoadMap() LoadMap

func ParseLoadMap added in v0.9.6 

func ParseLoadMap(loadList string) (LoadMap, error)

NewLoadMap parses a `--*-load` flag (e.g. `--max-load`), which is in multiple key-value format, such as: 

'Threads_running=100,Threads_connected=500'

func (*LoadMap) Duplicate added in v0.9.6 

func (this *LoadMap) Duplicate() LoadMap

Duplicate creates a clone of this map

func (*LoadMap) String added in v0.9.6 

func (this *LoadMap) String() string

String() returns a string representation of this map

type MigrationContext 

type MigrationContext struct {
	DatabaseName      string
	OriginalTableName string
	AlterStatement    string

	CountTableRows           bool
	AllowedRunningOnMaster   bool
	AllowedMasterMaster      bool
	SwitchToRowBinlogFormat  bool
	NullableUniqueKeyAllowed bool
	ApproveRenamedColumns    bool
	SkipRenamedColumns       bool

	ConfigFile  string
	CliUser     string
	CliPassword string

	ChunkSize                           int64
	NiceRatio                           int64
	MaxLagMillisecondsThrottleThreshold int64
	ReplictionLagQuery                  string
	ThrottleControlReplicaKeys          *mysql.InstanceKeyMap
	ThrottleFlagFile                    string
	ThrottleAdditionalFlagFile          string
	ThrottleQuery                       string
	ThrottleCommandedByUser             int64

	PostponeCutOverFlagFile   string
	CutOverLockTimeoutSeconds int64
	PanicFlagFile             string

	ServeSocketFile string
	ServeTCPPort    int64

	Noop                    bool
	TestOnReplica           bool
	MigrateOnReplica        bool
	OkToDropTable           bool
	InitiallyDropOldTable   bool
	InitiallyDropGhostTable bool
	CutOverType             CutOver

	TableEngine               string
	RowsEstimate              int64
	UsedRowsEstimateMethod    RowsEstimateMethod
	OriginalBinlogFormat      string
	OriginalBinlogRowImage    string
	InspectorConnectionConfig *mysql.ConnectionConfig
	ApplierConnectionConfig   *mysql.ConnectionConfig
	StartTime                 time.Time
	RowCopyStartTime          time.Time
	RowCopyEndTime            time.Time
	LockTablesStartTime       time.Time
	RenameTablesStartTime     time.Time
	RenameTablesEndTime       time.Time

	CurrentLag            int64
	TotalRowsCopied       int64
	TotalDMLEventsApplied int64

	IsPostponingCutOver int64

	OriginalTableColumns             *sql.ColumnList
	OriginalTableUniqueKeys          [](*sql.UniqueKey)
	GhostTableColumns                *sql.ColumnList
	GhostTableUniqueKeys             [](*sql.UniqueKey)
	UniqueKey                        *sql.UniqueKey
	SharedColumns                    *sql.ColumnList
	ColumnRenameMap                  map[string]string
	MappedSharedColumns              *sql.ColumnList
	MigrationRangeMinValues          *sql.ColumnValues
	MigrationRangeMaxValues          *sql.ColumnValues
	Iteration                        int64
	MigrationIterationRangeMinValues *sql.ColumnValues
	MigrationIterationRangeMaxValues *sql.ColumnValues

	CanStopStreaming func() bool
	// contains filtered or unexported fields
}

MigrationContext has the general, global state of migration. It is used by all components throughout the migration process.

func GetMigrationContext 

func GetMigrationContext() *MigrationContext

GetMigrationContext

func (*MigrationContext) ApplyCredentials added in v0.7.16 

func (this *MigrationContext) ApplyCredentials()

ApplyCredentials sorts out the credentials between the config file and the CLI flags

func (*MigrationContext) ElapsedRowCopyTime 

func (this *MigrationContext) ElapsedRowCopyTime() time.Duration

ElapsedRowCopyTime returns time since starting to copy chunks of rows

func (*MigrationContext) ElapsedTime 

func (this *MigrationContext) ElapsedTime() time.Duration

ElapsedTime returns time since very beginning of the process

func (*MigrationContext) GetChangelogTableName 

func (this *MigrationContext) GetChangelogTableName() string

GetChangelogTableName generates the name of changelog table, based on original table name

func (*MigrationContext) GetCriticalLoad added in v0.9.6 

func (this *MigrationContext) GetCriticalLoad() LoadMap

func (*MigrationContext) GetGhostTableName 

func (this *MigrationContext) GetGhostTableName() string

GetGhostTableName generates the name of ghost table, based on original table name

func (*MigrationContext) GetIteration 

func (this *MigrationContext) GetIteration() int64

func (*MigrationContext) GetMaxLoad added in v0.8.8 

func (this *MigrationContext) GetMaxLoad() LoadMap

func (*MigrationContext) GetOldTableName 

func (this *MigrationContext) GetOldTableName() string

GetOldTableName generates the name of the "old" table, into which the original table is renamed.

func (*MigrationContext) GetThrottleControlReplicaKeys added in v0.9.6 

func (this *MigrationContext) GetThrottleControlReplicaKeys() *mysql.InstanceKeyMap

func (*MigrationContext) GetThrottleQuery added in v0.9.6 

func (this *MigrationContext) GetThrottleQuery() string

func (*MigrationContext) GetTotalRowsCopied 

func (this *MigrationContext) GetTotalRowsCopied() int64

GetTotalRowsCopied returns the accurate number of rows being copied (affected) This is not exactly the same as the rows being iterated via chunks, but potentially close enough

func (*MigrationContext) GetVoluntaryLockName 

func (this *MigrationContext) GetVoluntaryLockName() string

GetVoluntaryLockName returns a name of a voluntary lock to be used throughout the swap-tables process.

func (*MigrationContext) HasMigrationRange 

func (this *MigrationContext) HasMigrationRange() bool

HasMigrationRange tells us whether there's a range to iterate for copying rows. It will be `false` if the table is initially empty

func (*MigrationContext) InspectorIsAlsoApplier 

func (this *MigrationContext) InspectorIsAlsoApplier() bool

InspectorIsAlsoApplier is `true` when the both inspector and applier are the same database instance. This would be true when running directly on master or when testing on replica.

func (*MigrationContext) IsThrottled 

func (this *MigrationContext) IsThrottled() (bool, string)

func (*MigrationContext) IsTransactionalTable 

func (this *MigrationContext) IsTransactionalTable() bool

func (*MigrationContext) MarkPointOfInterest added in v0.8.2 

func (this *MigrationContext) MarkPointOfInterest() int64

func (*MigrationContext) MarkRowCopyEndTime added in v0.9.6 

func (this *MigrationContext) MarkRowCopyEndTime()

ElapsedRowCopyTime returns time since starting to copy chunks of rows

func (*MigrationContext) MaxRetries 

func (this *MigrationContext) MaxRetries() int64

func (*MigrationContext) ReadConfigFile 

func (this *MigrationContext) ReadConfigFile() error

ReadConfigFile attempts to read the config file, if it exists

func (*MigrationContext) ReadCriticalLoad added in v0.9.6 

func (this *MigrationContext) ReadCriticalLoad(criticalLoadList string) error

ReadMaxLoad parses the `--max-load` flag, which is in multiple key-value format, such as: 'Threads_running=100,Threads_connected=500' It only applies changes in case there's no parsing error.

func (*MigrationContext) ReadMaxLoad 

func (this *MigrationContext) ReadMaxLoad(maxLoadList string) error

ReadMaxLoad parses the `--max-load` flag, which is in multiple key-value format, such as: 'Threads_running=100,Threads_connected=500' It only applies changes in case there's no parsing error.

func (*MigrationContext) ReadThrottleControlReplicaKeys added in v0.9.6 

func (this *MigrationContext) ReadThrottleControlReplicaKeys(throttleControlReplicas string) error

func (*MigrationContext) RequiresBinlogFormatChange 

func (this *MigrationContext) RequiresBinlogFormatChange() bool

RequiresBinlogFormatChange is `true` when the original binlog format isn't `ROW`

func (*MigrationContext) SetChunkSize added in v0.8.4 

func (this *MigrationContext) SetChunkSize(chunkSize int64)

func (*MigrationContext) SetCutOverLockTimeoutSeconds added in v1.0.1 

func (this *MigrationContext) SetCutOverLockTimeoutSeconds(timeoutSeconds int64) error

func (*MigrationContext) SetDefaultNumRetries added in v0.9.6 

func (this *MigrationContext) SetDefaultNumRetries(retries int64)

func (*MigrationContext) SetThrottleQuery added in v0.9.6 

func (this *MigrationContext) SetThrottleQuery(newQuery string)

func (*MigrationContext) SetThrottled 

func (this *MigrationContext) SetThrottled(throttle bool, reason string)

func (*MigrationContext) TimeSincePointOfInterest added in v0.8.2 

func (this *MigrationContext) TimeSincePointOfInterest() time.Duration

type RowsEstimateMethod 

type RowsEstimateMethod string

RowsEstimateMethod is the type of row number estimation

Source Files

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