importer

package
v0.0.0-...-6e93ed8 Latest Latest
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 Go to latest Published: Nov 21, 2024 License: Apache-2.0 Imports: 98 Imported by: 0

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Index

Constants

View Source 
const (
	FullLevelCompact = -1
	Level1Compact    = 1
)

compact levels

View Source 
const (
	TaskMetaTableName  = "task_meta_v2"
	TableMetaTableName = "table_meta"
	// CreateTableMetadataTable stores the per-table sub jobs information used by TiDB Lightning
	CreateTableMetadataTable = `` /* 693-byte string literal not displayed */

	// CreateTaskMetaTable stores the pre-lightning metadata used by TiDB Lightning
	CreateTaskMetaTable = `` /* 497-byte string literal not displayed */

)

task related table names and create table statements.

Variables

View Source 
var DeliverPauser = common.NewPauser()

DeliverPauser is a shared pauser to pause progress to (*chunkProcessor).encodeLoop

View Source 
var ErrDuplicateKey = errors.Normalize("duplicate key detected on indexID %d of KeyID: %v", errors.RFCCodeText("Lightning:PreDedup:ErrDuplicateKey"))

ErrDuplicateKey is an error class for duplicate key error.

Functions

func AlterAutoIncrement 

func AlterAutoIncrement(ctx context.Context, db *sql.DB, tableName string, incr uint64) error

AlterAutoIncrement rebase the table auto increment id

NOTE: since tidb can make sure the auto id is always be rebase even if the `incr` value is smaller than the auto increment base in tidb side, we needn't fetch currently auto increment value here. See: https://github.com/pingcap/tidb/blob/64698ef9a3358bfd0fdc323996bb7928a56cadca/ddl/ddl_api.go#L2528-L2533

func AlterAutoRandom 

func AlterAutoRandom(ctx context.Context, db *sql.DB, tableName string, randomBase uint64, maxAutoRandom uint64) error

AlterAutoRandom rebase the table auto random id

func DBFromConfig 

func DBFromConfig(ctx context.Context, dsn config.DBStore) (*sql.DB, error)

DBFromConfig creates a new connection to the TiDB database.

func DoChecksum 

func DoChecksum(ctx context.Context, table *checkpoints.TidbTableInfo) (*local.RemoteChecksum, error)

DoChecksum do checksum for tables. table should be in <db>.<table>, format. e.g. foo.bar

func LoadSchemaInfo 

func LoadSchemaInfo(
	ctx context.Context,
	schemas []*mydump.MDDatabaseMeta,
	getTables func(context.Context, string) ([]*model.TableInfo, error),
) (map[string]*checkpoints.TidbDBInfo, error)

LoadSchemaInfo loads schema information from TiDB.

func MaybeCleanupAllMetas 

func MaybeCleanupAllMetas(
	ctx context.Context,
	logger log.Logger,
	db *sql.DB,
	schemaName string,
	tableMetaExist bool,
) error

MaybeCleanupAllMetas remove the meta schema if there is no unfinished tables

func NewCDCPITRCheckItem 

func NewCDCPITRCheckItem(cfg *config.Config, pdAddrsGetter func(context.Context) []string) precheck.Checker

NewCDCPITRCheckItem creates a checker to check downstream has enabled CDC or PiTR.

func NewCSVHeaderCheckItem 

func NewCSVHeaderCheckItem(cfg *config.Config, preInfoGetter PreImportInfoGetter, dbMetas []*mydump.MDDatabaseMeta) precheck.Checker

NewCSVHeaderCheckItem creates a new csvHeaderCheckItem.

func NewCheckpointCheckItem 

func NewCheckpointCheckItem(cfg *config.Config, preInfoGetter PreImportInfoGetter, dbMetas []*mydump.MDDatabaseMeta, checkpointsDB checkpoints.DB) precheck.Checker

NewCheckpointCheckItem creates a new checkpointCheckItem.

func NewChecksumManager 

func NewChecksumManager(ctx context.Context, rc *Controller, store kv.Storage) (local.ChecksumManager, error)

NewChecksumManager creates a new checksum manager.

func NewClusterResourceCheckItem 

func NewClusterResourceCheckItem(preInfoGetter PreImportInfoGetter) precheck.Checker

NewClusterResourceCheckItem creates a new clusterResourceCheckItem.

func NewClusterVersionCheckItem 

func NewClusterVersionCheckItem(preInfoGetter PreImportInfoGetter, dbMetas []*mydump.MDDatabaseMeta) precheck.Checker

NewClusterVersionCheckItem creates a new clusterVersionCheckItem.

func NewEmptyRegionCheckItem 

func NewEmptyRegionCheckItem(preInfoGetter PreImportInfoGetter, dbMetas []*mydump.MDDatabaseMeta) precheck.Checker

NewEmptyRegionCheckItem creates a new emptyRegionCheckItem.

func NewLargeFileCheckItem 

func NewLargeFileCheckItem(cfg *config.Config, dbMetas []*mydump.MDDatabaseMeta) precheck.Checker

NewLargeFileCheckItem creates a new largeFileCheckItem.

func NewLocalDiskPlacementCheckItem 

func NewLocalDiskPlacementCheckItem(cfg *config.Config) precheck.Checker

NewLocalDiskPlacementCheckItem creates a new localDiskPlacementCheckItem.

func NewLocalTempKVDirCheckItem 

func NewLocalTempKVDirCheckItem(cfg *config.Config, preInfoGetter PreImportInfoGetter, dbMetas []*mydump.MDDatabaseMeta) precheck.Checker

NewLocalTempKVDirCheckItem creates a new localTempKVDirCheckItem.

func NewRegionDistributionCheckItem 

func NewRegionDistributionCheckItem(preInfoGetter PreImportInfoGetter, dbMetas []*mydump.MDDatabaseMeta) precheck.Checker

NewRegionDistributionCheckItem creates a new regionDistributionCheckItem.

func NewSchemaCheckItem 

func NewSchemaCheckItem(cfg *config.Config, preInfoGetter PreImportInfoGetter, dbMetas []*mydump.MDDatabaseMeta, cpdb checkpoints.DB) precheck.Checker

NewSchemaCheckItem creates a checker to check whether the schema is valid.

func NewStoragePermissionCheckItem 

func NewStoragePermissionCheckItem(cfg *config.Config) precheck.Checker

NewStoragePermissionCheckItem creates a new storagePermissionCheckItem.

func NewTableEmptyCheckItem 

func NewTableEmptyCheckItem(cfg *config.Config, preInfoGetter PreImportInfoGetter, dbMetas []*mydump.MDDatabaseMeta, cpdb checkpoints.DB) precheck.Checker

NewTableEmptyCheckItem creates a new tableEmptyCheckItem

func ObtainImportantVariables 

func ObtainImportantVariables(ctx context.Context, db *sql.DB, needTiDBVars bool) map[string]string

ObtainImportantVariables obtains the important variables from TiDB.

func ObtainNewCollationEnabled 

func ObtainNewCollationEnabled(ctx context.Context, db *sql.DB) (bool, error)

ObtainNewCollationEnabled obtains the new collation enabled status from TiDB.

func RemoveTableMetaByTableName 

func RemoveTableMetaByTableName(ctx context.Context, db *sql.DB, metaTable, tableName string) error

RemoveTableMetaByTableName remove table meta by table name

func WithPreInfoGetterDBMetas 

func WithPreInfoGetterDBMetas(ctx context.Context, dbMetas []*mydump.MDDatabaseMeta) context.Context

WithPreInfoGetterDBMetas returns a new context with the specified dbMetas.

func WithPrecheckKey 

func WithPrecheckKey(ctx context.Context, key precheckContextKey, val any) context.Context

WithPrecheckKey returns a new context with the given key and value.

Types

type CDCPITRCheckItem 

type CDCPITRCheckItem struct {
	Instruction string
	// contains filtered or unexported fields
}

CDCPITRCheckItem check downstream has enabled CDC or PiTR. It's exposed to let caller override the Instruction message.

func (*CDCPITRCheckItem) Check 

func (ci *CDCPITRCheckItem) Check(ctx context.Context) (*precheck.CheckResult, error)

Check implements Checker interface.

func (*CDCPITRCheckItem) GetCheckItemID 

func (*CDCPITRCheckItem) GetCheckItemID() precheck.CheckItemID

GetCheckItemID implements Checker interface.

type Controller 

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

Controller controls the whole import process.

func NewImportController 

func NewImportController(
	ctx context.Context,
	cfg *config.Config,
	param *ControllerParam,
) (*Controller, error)

NewImportController creates a new Controller instance.

func NewImportControllerWithPauser 

func NewImportControllerWithPauser(
	ctx context.Context,
	cfg *config.Config,
	p *ControllerParam,
) (*Controller, error)

NewImportControllerWithPauser creates a new Controller instance with a pauser.

func (*Controller) Close 

func (rc *Controller) Close()

Close closes the controller.

func (*Controller) ClusterIsAvailable 

func (rc *Controller) ClusterIsAvailable(ctx context.Context) error

ClusterIsAvailable check cluster is available to import data. this test can be skipped.

func (*Controller) DataCheck 

func (rc *Controller) DataCheck(ctx context.Context) error

DataCheck checks the data schema which needs #rc.restoreSchema finished.

func (*Controller) HasLargeCSV 

func (rc *Controller) HasLargeCSV(ctx context.Context) error

HasLargeCSV checks whether input csvs is fit for Lightning import. If strictFormat is false, and csv file is large. Lightning will have performance issue. this test cannot be skipped.

func (*Controller) Run 

func (rc *Controller) Run(ctx context.Context) error

Run starts the restore task.

func (*Controller) StoragePermission 

func (rc *Controller) StoragePermission(ctx context.Context) error

StoragePermission checks whether Lightning has enough permission to storage.

type ControllerParam 

type ControllerParam struct {
	// databases that dumper created
	DBMetas []*mydump.MDDatabaseMeta
	// a pointer to status to report it to caller
	Status *LightningStatus
	// storage interface to read the dump data
	DumpFileStorage storage.ExternalStorage
	// true if DumpFileStorage is created by lightning. In some cases where lightning is a library, the framework may pass an DumpFileStorage
	OwnExtStorage bool
	// used by lightning server mode to pause tasks
	Pauser *common.Pauser
	// DB is a connection pool to TiDB
	DB *sql.DB
	// storage interface to write file checkpoints
	CheckpointStorage storage.ExternalStorage
	// when CheckpointStorage is not nil, save file checkpoint to it with this name
	CheckpointName string
	// DupIndicator can expose the duplicate detection result to the caller
	DupIndicator *atomic.Bool
	// Keyspace name
	KeyspaceName string
	// ResourceGroup name for current TiDB user
	ResourceGroupName string
	// TaskType is the source component name use for background task control.
	TaskType string
}

ControllerParam contains many parameters for creating a Controller.

type EstimateSourceDataSizeResult 

type EstimateSourceDataSizeResult struct {
	// SizeWithIndex is the tikv size with the index.
	SizeWithIndex int64
	// SizeWithoutIndex is the tikv size without the index.
	SizeWithoutIndex int64
	// HasUnsortedBigTables indicates whether the source data has unsorted big tables or not.
	HasUnsortedBigTables bool
	// TiFlashSize is the size of tiflash.
	TiFlashSize int64
}

EstimateSourceDataSizeResult is the object for estimated data size result.

type LightningStatus 

type LightningStatus struct {
	FinishedFileSize atomic.Int64
	TotalFileSize    atomic.Int64
	// contains filtered or unexported fields
}

LightningStatus provides the finished bytes and total bytes of the current task. It should keep the value after restart from checkpoint. When it is tidb backend, FinishedFileSize can be counted after chunk data is restored to tidb. When it is local backend it's counted after whole engine is imported. TotalFileSize may be an estimated value, so when the task is finished, it may not equal to FinishedFileSize.

type PreImportInfoGetter 

type PreImportInfoGetter interface {
	TargetInfoGetter
	// GetAllTableStructures gets all the table structures with the information from both the source and the target.
	GetAllTableStructures(ctx context.Context, opts ...ropts.GetPreInfoOption) (map[string]*checkpoints.TidbDBInfo, error)
	// ReadFirstNRowsByTableName reads the first N rows of data of an importing source table.
	ReadFirstNRowsByTableName(ctx context.Context, schemaName string, tableName string, n int) (cols []string, rows [][]types.Datum, err error)
	// ReadFirstNRowsByFileMeta reads the first N rows of an data file.
	ReadFirstNRowsByFileMeta(ctx context.Context, dataFileMeta mydump.SourceFileMeta, n int) (cols []string, rows [][]types.Datum, err error)
	// EstimateSourceDataSize estimates the datasize to generate during the import as well as some other sub-informaiton.
	// It will return:
	// * the estimated data size to generate during the import,
	//   which might include some extra index data to generate besides the source file data
	// * the total data size of all the source files,
	// * whether there are some unsorted big tables
	EstimateSourceDataSize(ctx context.Context, opts ...ropts.GetPreInfoOption) (*EstimateSourceDataSizeResult, error)
}

PreImportInfoGetter defines the operations to get information from sources and target. These information are used in the preparation of the import ( like precheck ).

type PreImportInfoGetterImpl 

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

PreImportInfoGetterImpl implements the operations to get information used in importing preparation.

func NewPreImportInfoGetter 

func NewPreImportInfoGetter(
	cfg *config.Config,
	dbMetas []*mydump.MDDatabaseMeta,
	srcStorage storage.ExternalStorage,
	targetInfoGetter TargetInfoGetter,
	ioWorkers *worker.Pool,
	encBuilder encode.EncodingBuilder,
	opts ...ropts.GetPreInfoOption,
) (*PreImportInfoGetterImpl, error)

NewPreImportInfoGetter creates a PreImportInfoGetterImpl object.

func (*PreImportInfoGetterImpl) CheckVersionRequirements 

func (p *PreImportInfoGetterImpl) CheckVersionRequirements(ctx context.Context) error

CheckVersionRequirements performs the check whether the target satisfies the version requirements. It implements the PreImportInfoGetter interface. Mydump database metas are retrieved from the context.

func (*PreImportInfoGetterImpl) EstimateSourceDataSize 

func (p *PreImportInfoGetterImpl) EstimateSourceDataSize(ctx context.Context, opts ...ropts.GetPreInfoOption) (*EstimateSourceDataSizeResult, error)

EstimateSourceDataSize estimates the datasize to generate during the import as well as some other sub-informaiton. It implements the PreImportInfoGetter interface. It has a cache mechanism. The estimated size will only calculated once. The caching behavior can be changed by appending the `ForceReloadCache(true)` option.

func (*PreImportInfoGetterImpl) FetchRemoteDBModels 

func (p *PreImportInfoGetterImpl) FetchRemoteDBModels(ctx context.Context) ([]*model.DBInfo, error)

FetchRemoteDBModels fetches the database structures from the remote target. It implements the PreImportInfoGetter interface.

func (*PreImportInfoGetterImpl) FetchRemoteTableModels 

func (p *PreImportInfoGetterImpl) FetchRemoteTableModels(
	ctx context.Context,
	schemaName string,
	tableNames []string,
) (map[string]*model.TableInfo, error)

FetchRemoteTableModels fetches the table structures from the remote target. It implements the PreImportInfoGetter interface.

func (*PreImportInfoGetterImpl) GetAllTableStructures 

func (p *PreImportInfoGetterImpl) GetAllTableStructures(ctx context.Context, opts ...ropts.GetPreInfoOption) (map[string]*checkpoints.TidbDBInfo, error)

GetAllTableStructures gets all the table structures with the information from both the source and the target. It implements the PreImportInfoGetter interface. It has a caching mechanism: the table structures will be obtained from the source only once.

func (*PreImportInfoGetterImpl) GetEmptyRegionsInfo 

func (p *PreImportInfoGetterImpl) GetEmptyRegionsInfo(ctx context.Context) (*pdhttp.RegionsInfo, error)

GetEmptyRegionsInfo gets the region information of all the empty regions on the target. It implements the PreImportInfoGetter interface.

func (*PreImportInfoGetterImpl) GetMaxReplica 

func (p *PreImportInfoGetterImpl) GetMaxReplica(ctx context.Context) (uint64, error)

GetMaxReplica implements the PreImportInfoGetter interface.

func (*PreImportInfoGetterImpl) GetStorageInfo 

func (p *PreImportInfoGetterImpl) GetStorageInfo(ctx context.Context) (*pdhttp.StoresInfo, error)

GetStorageInfo gets the storage information on the target. It implements the PreImportInfoGetter interface.

func (*PreImportInfoGetterImpl) GetTargetSysVariablesForImport 

func (p *PreImportInfoGetterImpl) GetTargetSysVariablesForImport(ctx context.Context, opts ...ropts.GetPreInfoOption) map[string]string

GetTargetSysVariablesForImport gets some important systam variables for importing on the target. It implements the PreImportInfoGetter interface. It has caching mechanism.

func (*PreImportInfoGetterImpl) Init 

func (p *PreImportInfoGetterImpl) Init()

Init initializes some internal data and states for PreImportInfoGetterImpl.

func (*PreImportInfoGetterImpl) IsTableEmpty 

func (p *PreImportInfoGetterImpl) IsTableEmpty(ctx context.Context, schemaName string, tableName string) (*bool, error)

IsTableEmpty checks whether the specified table on the target DB contains data or not. It implements the PreImportInfoGetter interface.

func (*PreImportInfoGetterImpl) ReadFirstNRowsByFileMeta 

func (p *PreImportInfoGetterImpl) ReadFirstNRowsByFileMeta(ctx context.Context, dataFileMeta mydump.SourceFileMeta, n int) ([]string, [][]types.Datum, error)

ReadFirstNRowsByFileMeta reads the first N rows of an data file. It implements the PreImportInfoGetter interface.

func (*PreImportInfoGetterImpl) ReadFirstNRowsByTableName 

func (p *PreImportInfoGetterImpl) ReadFirstNRowsByTableName(ctx context.Context, schemaName string, tableName string, n int) ([]string, [][]types.Datum, error)

ReadFirstNRowsByTableName reads the first N rows of data of an importing source table. It implements the PreImportInfoGetter interface.

type PrecheckItemBuilder 

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

PrecheckItemBuilder is used to build precheck items

func NewPrecheckItemBuilder 

func NewPrecheckItemBuilder(
	cfg *config.Config,
	dbMetas []*mydump.MDDatabaseMeta,
	preInfoGetter PreImportInfoGetter,
	checkpointsDB checkpoints.DB,
	pdHTTPCli pdhttp.Client,
) *PrecheckItemBuilder

NewPrecheckItemBuilder creates a new PrecheckItemBuilder

func NewPrecheckItemBuilderFromConfig 

func NewPrecheckItemBuilderFromConfig(
	ctx context.Context,
	cfg *config.Config,
	pdHTTPCli pdhttp.Client,
	opts ...ropts.PrecheckItemBuilderOption,
) (*PrecheckItemBuilder, error)

NewPrecheckItemBuilderFromConfig creates a new PrecheckItemBuilder from config pdHTTPCli **must not** be nil for local backend

func (*PrecheckItemBuilder) BuildPrecheckItem 

func (b *PrecheckItemBuilder) BuildPrecheckItem(checkID precheck.CheckItemID) (precheck.Checker, error)

BuildPrecheckItem builds a Checker by the given checkID

func (*PrecheckItemBuilder) GetPreInfoGetter 

func (b *PrecheckItemBuilder) GetPreInfoGetter() PreImportInfoGetter

GetPreInfoGetter gets the pre restore info getter from the builder.

type SimpleTemplate 

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

SimpleTemplate is a simple template for lightning check.

func (*SimpleTemplate) Collect 

func (c *SimpleTemplate) Collect(t precheck.CheckType, passed bool, msg string)

Collect mainly collect performance related checks' results and critical level checks' results.

func (*SimpleTemplate) FailedCount 

func (c *SimpleTemplate) FailedCount(t precheck.CheckType) int

FailedCount represents (the warn check failed count, the critical check failed count)

func (*SimpleTemplate) FailedMsg 

func (c *SimpleTemplate) FailedMsg() string

FailedMsg returns the error msg for the failed check.

func (*SimpleTemplate) Output 

func (c *SimpleTemplate) Output() string

Output print all checks results.

func (*SimpleTemplate) Success 

func (c *SimpleTemplate) Success() bool

Success represents the whole check has passed or not.

type TableImporter 

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

TableImporter is a helper struct to import a table.

func NewTableImporter 

func NewTableImporter(
	tableName string,
	tableMeta *mydump.MDTableMeta,
	dbInfo *checkpoints.TidbDBInfo,
	tableInfo *checkpoints.TidbTableInfo,
	cp *checkpoints.TableCheckpoint,
	ignoreColumns map[string]struct{},
	kvStore tidbkv.Storage,
	etcdCli *clientv3.Client,
	logger log.Logger,
) (*TableImporter, error)

NewTableImporter creates a new TableImporter.

func (*TableImporter) AutoIDClient 

func (tr *TableImporter) AutoIDClient() *autoid.ClientDiscover

AutoIDClient implements the autoid.Requirement interface.

func (*TableImporter) Close 

func (tr *TableImporter) Close()

Close implements the Importer interface.

func (*TableImporter) RebaseChunkRowIDs 

func (*TableImporter) RebaseChunkRowIDs(cp *checkpoints.TableCheckpoint, rowIDBase int64)

RebaseChunkRowIDs rebase the row id of the chunks.

func (*TableImporter) Store 

func (tr *TableImporter) Store() tidbkv.Storage

Store implements the autoid.Requirement interface.

type TargetInfoGetter 

type TargetInfoGetter interface {
	// FetchRemoteDBModels fetches the database structures from the remote target.
	FetchRemoteDBModels(ctx context.Context) ([]*model.DBInfo, error)
	// FetchRemoteTableModels fetches the table structures from the remote target.
	FetchRemoteTableModels(ctx context.Context, schemaName string, tableNames []string) (map[string]*model.TableInfo, error)
	// CheckVersionRequirements performs the check whether the target satisfies the version requirements.
	CheckVersionRequirements(ctx context.Context) error
	// IsTableEmpty checks whether the specified table on the target DB contains data or not.
	IsTableEmpty(ctx context.Context, schemaName string, tableName string) (*bool, error)
	// GetTargetSysVariablesForImport gets some important systam variables for importing on the target.
	GetTargetSysVariablesForImport(ctx context.Context, opts ...ropts.GetPreInfoOption) map[string]string
	// GetMaxReplica gets the max-replica from replication config on the target.
	GetMaxReplica(ctx context.Context) (uint64, error)
	// GetStorageInfo gets the storage information on the target.
	GetStorageInfo(ctx context.Context) (*pdhttp.StoresInfo, error)
	// GetEmptyRegionsInfo gets the region information of all the empty regions on the target.
	GetEmptyRegionsInfo(ctx context.Context) (*pdhttp.RegionsInfo, error)
}

TargetInfoGetter defines the operations to get information from target.

type TargetInfoGetterImpl 

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

TargetInfoGetterImpl implements the operations to get information from the target.

func NewTargetInfoGetterImpl 

func NewTargetInfoGetterImpl(
	cfg *config.Config,
	targetDB *sql.DB,
	pdHTTPCli pdhttp.Client,
) (*TargetInfoGetterImpl, error)

NewTargetInfoGetterImpl creates a TargetInfoGetterImpl object.

func (*TargetInfoGetterImpl) CheckVersionRequirements 

func (g *TargetInfoGetterImpl) CheckVersionRequirements(ctx context.Context) error

CheckVersionRequirements performs the check whether the target satisfies the version requirements. It implements the TargetInfoGetter interface. Mydump database metas are retrieved from the context.

func (*TargetInfoGetterImpl) FetchRemoteDBModels 

func (g *TargetInfoGetterImpl) FetchRemoteDBModels(ctx context.Context) ([]*model.DBInfo, error)

FetchRemoteDBModels implements TargetInfoGetter.

func (*TargetInfoGetterImpl) FetchRemoteTableModels 

func (g *TargetInfoGetterImpl) FetchRemoteTableModels(
	ctx context.Context,
	schemaName string,
	tableNames []string,
) (map[string]*model.TableInfo, error)

FetchRemoteTableModels fetches the table structures from the remote target. It implements the TargetInfoGetter interface.

func (*TargetInfoGetterImpl) GetEmptyRegionsInfo 

func (g *TargetInfoGetterImpl) GetEmptyRegionsInfo(ctx context.Context) (*pdhttp.RegionsInfo, error)

GetEmptyRegionsInfo gets the region information of all the empty regions on the target. It implements the TargetInfoGetter interface. It uses the PD interface through TLS to get the information.

func (*TargetInfoGetterImpl) GetMaxReplica 

func (g *TargetInfoGetterImpl) GetMaxReplica(ctx context.Context) (uint64, error)

GetMaxReplica implements the TargetInfoGetter interface.

func (*TargetInfoGetterImpl) GetStorageInfo 

func (g *TargetInfoGetterImpl) GetStorageInfo(ctx context.Context) (*pdhttp.StoresInfo, error)

GetStorageInfo gets the storage information on the target. It implements the TargetInfoGetter interface. It uses the PD interface through TLS to get the information.

func (*TargetInfoGetterImpl) GetTargetSysVariablesForImport 

func (g *TargetInfoGetterImpl) GetTargetSysVariablesForImport(ctx context.Context, _ ...ropts.GetPreInfoOption) map[string]string

GetTargetSysVariablesForImport gets some important system variables for importing on the target. It implements the TargetInfoGetter interface. It uses the SQL to fetch sys variables from the target.

func (*TargetInfoGetterImpl) IsTableEmpty 

func (g *TargetInfoGetterImpl) IsTableEmpty(ctx context.Context, schemaName string, tableName string) (*bool, error)

IsTableEmpty checks whether the specified table on the target DB contains data or not. It implements the TargetInfoGetter interface. It tries to select the row count from the target DB.

type Template 

type Template interface {
	// Collect mainly collect performance related checks' results and critical level checks' results.
	// If the performance is not as expect or one of critical check not passed. it will stop import task.
	Collect(t precheck.CheckType, passed bool, msg string)

	// Success represents the whole check has passed or not.
	Success() bool

	// FailedCount represents (the warn check failed count, the critical check failed count)
	FailedCount(t precheck.CheckType) int

	// Output print all checks results.
	Output() string

	// FailedMsg represents the error msg for the failed check.
	FailedMsg() string
}

Template is the interface for lightning check.

func NewSimpleTemplate 

func NewSimpleTemplate() Template

NewSimpleTemplate returns a simple template.

type TiDBManager 

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

TiDBManager is a wrapper of *sql.DB which provides some helper methods for

func NewTiDBManager 

func NewTiDBManager(ctx context.Context, dsn config.DBStore, _ *common.TLS) (*TiDBManager, error)

NewTiDBManager creates a new TiDB manager.

func NewTiDBManagerWithDB 

func NewTiDBManagerWithDB(db *sql.DB, sqlMode mysql.SQLMode) *TiDBManager

NewTiDBManagerWithDB creates a new TiDB manager with an existing database connection.

func (*TiDBManager) Close 

func (timgr *TiDBManager) Close()

Close closes the underlying database connection.

func (*TiDBManager) DropTable 

func (timgr *TiDBManager) DropTable(ctx context.Context, tableName string) error

DropTable drops a table.

Source Files

View all Source files

Directories

Path Synopsis
Package opts contains all kinds of options definitions that can affect the behavior of restore & get infos.
 Package opts contains all kinds of options definitions that can affect the behavior of restore & get infos.

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