ingest

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 Go to latest Published: Nov 13, 2024 License: Apache-2.0 Imports: 53 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	JobCheckpointVersionCurrent = JobCheckpointVersion1
	JobCheckpointVersion1       = 1
)

JobCheckpointVersionCurrent is the current version of the checkpoint.

View Source 
const (
	LitErrAllocMemFail      string = "allocate memory failed"
	LitErrCreateDirFail     string = "create ingest sort path error"
	LitErrStatDirFail       string = "stat ingest sort path error"
	LitErrCreateBackendFail string = "build ingest backend failed"
	LitErrGetBackendFail    string = "cannot get ingest backend"
	LitErrCreateEngineFail  string = "build ingest engine failed"
	LitErrCreateContextFail string = "build ingest writer context failed"
	LitErrGetEngineFail     string = "can not get ingest engine info"
	LitErrGetStorageQuota   string = "get storage quota error"
	LitErrCloseEngineErr    string = "close engine error"
	LitErrCleanEngineErr    string = "clean engine error"
	LitErrFlushEngineErr    string = "flush engine data err"
	LitErrIngestDataErr     string = "ingest data into storage error"
	LitErrRemoteDupExistErr string = "remote duplicate index key exist"
	LitErrExceedConcurrency string = "the concurrency is greater than ingest limit"
	LitErrCloseWriterErr    string = "close writer error"
	LitErrReadSortPath      string = "cannot read sort path"
	LitErrCleanSortPath     string = "clean up temp dir failed"
	LitErrResetEngineFail   string = "reset engine failed"
	LitWarnEnvInitFail      string = "initialize environment failed"
	LitWarnConfigError      string = "build config for backend failed"
	LitInfoEnvInitSucc      string = "init global ingest backend environment finished"
	LitInfoSortDir          string = "the ingest sorted directory"
	LitInfoCreateBackend    string = "create one backend for an DDL job"
	LitInfoCloseBackend     string = "close one backend for DDL job"
	LitInfoOpenEngine       string = "open an engine for index reorg task"
	LitInfoCreateWrite      string = "create one local writer for index reorg task"
	LitInfoCloseEngine      string = "flush all writer and get closed engine"
	LitInfoRemoteDupCheck   string = "start remote duplicate checking"
	LitInfoStartImport      string = "start to import data"
	LitInfoChgMemSetting    string = "change memory setting for ingest"
	LitInfoInitMemSetting   string = "initial memory setting for ingest"
	LitInfoUnsafeImport     string = "do a partial import data into the storage"
)

Message const text

Variables

View Source 
var (
	// LitBackCtxMgr is the entry for the lightning backfill process.
	LitBackCtxMgr BackendCtxMgr
	// LitMemRoot is used to track the memory usage of the lightning backfill process.
	LitMemRoot MemRoot

	// LitInitialized is the flag indicates whether the lightning backfill process is initialized.
	LitInitialized bool
)
View Source 
var ForceSyncFlagForTest = false

ForceSyncFlagForTest is a flag to force sync only for test.

View Source 
var ImporterRangeConcurrencyForTest *atomic.Int32

ImporterRangeConcurrencyForTest is only used for test.

View Source 
var MockDMLExecutionStateBeforeImport func()

MockDMLExecutionStateBeforeImport is a failpoint to mock the DML execution state before import.

View Source 
var MockExecAfterWriteRow func()

MockExecAfterWriteRow is only used for test.

View Source 
var ResignOwnerForTest = atomic.NewBool(false)

ResignOwnerForTest is only used for test.

Functions

func CleanUpTempDir 

func CleanUpTempDir(ctx context.Context, se sessionctx.Context, path string)

CleanUpTempDir is used to remove the stale index data. This function gets running DDL jobs from `mysql.tidb_ddl_job` and it only removes the folders that related to finished jobs.

func CopReadBatchSize 

func CopReadBatchSize(hintSize int) int

CopReadBatchSize is the batch size of coprocessor read. It multiplies the tidb_ddl_reorg_batch_size by 10 to avoid sending too many cop requests for the same handle range.

func CopReadChunkPoolSize 

func CopReadChunkPoolSize(hintConc int) int

CopReadChunkPoolSize is the size of chunk pool, which represents the max concurrent ongoing coprocessor requests. It multiplies the tidb_ddl_reorg_worker_cnt by 10.

func GenIngestTempDataDir 

func GenIngestTempDataDir() (string, error)

GenIngestTempDataDir generates a path for DDL ingest. Format: ${temp-dir}/tmp_ddl-{port}

func InitGlobalLightningEnv 

func InitGlobalLightningEnv(path string) (ok bool)

InitGlobalLightningEnv initialize Lightning backfill environment.

func InstanceAddr 

func InstanceAddr() string

InstanceAddr returns the string concat with instance address and temp-dir.

func NewDDLTLS 

func NewDDLTLS() (*common.TLS, error)

NewDDLTLS creates a common.TLS from the tidb config for DDL.

func NewMemRootImpl 

func NewMemRootImpl(maxQuota int64, bcCtxMgr *litBackendCtxMgr) *memRootImpl

NewMemRootImpl creates a new memRootImpl.

func RiskOfDiskFull 

func RiskOfDiskFull(available, capacity uint64) bool

RiskOfDiskFull checks if the disk has less than 10% space.

func TryConvertToKeyExistsErr 

func TryConvertToKeyExistsErr(originErr error, idxInfo *model.IndexInfo, tblInfo *model.TableInfo) error

TryConvertToKeyExistsErr checks if the input error is ErrFoundDuplicateKeys. If so, convert it to a KeyExists error.

Types

type BackendCtx 

type BackendCtx interface {
	// Register create a new engineInfo for each index ID and register it to the
	// backend context. If the index ID is already registered, it will return the
	// associated engines. Only one group of index ID is allowed to register for a
	// BackendCtx.
	//
	// Register is only used in local disk based ingest.
	Register(indexIDs []int64, uniques []bool, tbl table.Table) ([]Engine, error)
	// FinishAndUnregisterEngines finishes the task and unregisters all engines that
	// are Register-ed before. It's safe to call it multiple times.
	//
	// FinishAndUnregisterEngines is only used in local disk based ingest.
	FinishAndUnregisterEngines(opt UnregisterOpt) error

	FlushController

	AttachCheckpointManager(*CheckpointManager)
	GetCheckpointManager() *CheckpointManager

	// GetLocalBackend exposes local.Backend. It's only used in global sort based
	// ingest.
	GetLocalBackend() *local.Backend
	// CollectRemoteDuplicateRows collects duplicate entry error for given index as
	// the supplement of FlushController.Flush.
	//
	// CollectRemoteDuplicateRows is only used in global sort based ingest.
	CollectRemoteDuplicateRows(indexID int64, tbl table.Table) error
}

BackendCtx is the backend context for one add index reorg task.

type BackendCtxMgr 

type BackendCtxMgr interface {
	// CheckMoreTasksAvailable checks if it can run more ingest backfill tasks.
	CheckMoreTasksAvailable() (bool, error)
	// Register uses jobID to identify the BackendCtx. If there's already a
	// BackendCtx with the same jobID, it will be returned. Otherwise, a new
	// BackendCtx will be created and returned.
	Register(
		ctx context.Context,
		jobID int64,
		hasUnique bool,
		etcdClient *clientv3.Client,
		pdSvcDiscovery pd.ServiceDiscovery,
		resourceGroupName string,
		importConc int,
		initTS uint64,
	) (BackendCtx, error)
	Unregister(jobID int64)
	// EncodeJobSortPath encodes the job ID to the local disk sort path.
	EncodeJobSortPath(jobID int64) string
	// Load returns the registered BackendCtx with the given jobID.
	Load(jobID int64) (BackendCtx, bool)
}

BackendCtxMgr is used to manage the BackendCtx.

func NewLitBackendCtxMgr 

func NewLitBackendCtxMgr(path string, memQuota uint64) BackendCtxMgr

NewLitBackendCtxMgr creates a new litBackendCtxMgr.

type CheckpointManager 

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

CheckpointManager is a checkpoint manager implementation that used by non-distributed reorganization. It manages the data as two-level checkpoints: "flush"ed to local storage and "import"ed to TiKV. The checkpoint is saved in a table in the TiDB cluster.

func NewCheckpointManager 

func NewCheckpointManager(
	ctx context.Context,
	sessPool *sess.Pool,
	physicalID int64,
	jobID int64,
	indexIDs []int64,
	localStoreDir string,
	pdCli pd.Client,
) (*CheckpointManager, error)

NewCheckpointManager creates a new checkpoint manager.

func (*CheckpointManager) AdvanceWatermark 

func (s *CheckpointManager) AdvanceWatermark(flushed, imported bool)

AdvanceWatermark advances the watermark according to flushed or imported status.

func (*CheckpointManager) Close 

func (s *CheckpointManager) Close()

Close closes the checkpoint manager.

func (*CheckpointManager) GetTS 

func (s *CheckpointManager) GetTS() uint64

GetTS returns the TS saved in checkpoint.

func (*CheckpointManager) IsKeyProcessed 

func (s *CheckpointManager) IsKeyProcessed(end kv.Key) bool

IsKeyProcessed checks if the key is processed. The key may not be imported. This is called before the reader reads the data and decides whether to skip the current task.

func (*CheckpointManager) NextKeyToProcess 

func (s *CheckpointManager) NextKeyToProcess() kv.Key

NextKeyToProcess finds the next unprocessed key in checkpoint. If there is no such key, it returns nil.

func (*CheckpointManager) Register 

func (s *CheckpointManager) Register(taskID int, end kv.Key)

Register registers a new task. taskID MUST be continuous ascending and start from 0.

TODO(lance6716): remove this constraint, use endKey as taskID and use ordered map type for checkpoints.

func (*CheckpointManager) Status 

func (s *CheckpointManager) Status() (keyCnt int, minKeyImported kv.Key)

Status returns the status of the checkpoint.

func (*CheckpointManager) UpdateTotalKeys 

func (s *CheckpointManager) UpdateTotalKeys(taskID int, delta int, last bool)

UpdateTotalKeys updates the total keys of the task. This is called by the reader after reading the data to update the number of rows contained in the current chunk.

func (*CheckpointManager) UpdateWrittenKeys 

func (s *CheckpointManager) UpdateWrittenKeys(taskID int, delta int)

UpdateWrittenKeys updates the written keys of the task. This is called by the writer after writing the local engine to update the current number of rows written.

type DiskRoot 

type DiskRoot interface {
	UpdateUsage()
	ShouldImport() bool
	UsageInfo() string
	PreCheckUsage() error
	StartupCheck() error
}

DiskRoot is used to track the disk usage for the lightning backfill process.

func NewDiskRootImpl 

func NewDiskRootImpl(path string, bcCtx *litBackendCtxMgr) DiskRoot

NewDiskRootImpl creates a new DiskRoot.

type Engine 

type Engine interface {
	Flush() error
	Close(cleanup bool)
	CreateWriter(id int, writerCfg *backend.LocalWriterConfig) (Writer, error)
}

Engine is the interface for the engine that can be used to write key-value pairs.

type FlushController 

type FlushController interface {
	// Flush checks if al engines need to be flushed and imported based on given
	// FlushMode. It's concurrent safe.
	Flush(ctx context.Context, mode FlushMode) (flushed, imported bool, err error)
}

FlushController is an interface to control the flush of data so after it returns caller can save checkpoint.

type FlushMode 

type FlushMode byte

FlushMode is used to control how to flush. 

const (
	// FlushModeAuto means caller does not enforce any flush, the implementation can
	// decide it.
	FlushModeAuto FlushMode = iota
	// FlushModeForceFlushAndImport means flush and import all data to TiKV.
	FlushModeForceFlushAndImport
)

type JobReorgMeta 

type JobReorgMeta struct {
	Checkpoint *ReorgCheckpoint `json:"reorg_checkpoint"`
}

JobReorgMeta is the metadata for a reorg job.

type MemRoot 

type MemRoot interface {
	Consume(size int64)
	Release(size int64)
	CheckConsume(size int64) bool
	// ConsumeWithTag consumes memory with a tag. The main difference between
	// ConsumeWithTag and Consume is that if the memory is updated afterward, caller
	// can use ReleaseWithTag then ConsumeWithTag to update the memory usage.
	ConsumeWithTag(tag string, size int64)
	ReleaseWithTag(tag string)

	SetMaxMemoryQuota(quota int64)
	MaxMemoryQuota() int64
	CurrentUsage() int64
	CurrentUsageWithTag(tag string) int64
	RefreshConsumption()
}

MemRoot is used to track the memory usage for the lightning backfill process. TODO(lance6716): change API to prevent TOCTOU.

type MockBackendCtx 

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

MockBackendCtx is a mock backend context.

func (*MockBackendCtx) AttachCheckpointManager 

func (m *MockBackendCtx) AttachCheckpointManager(mgr *CheckpointManager)

AttachCheckpointManager attaches a checkpoint manager to the backend context.

func (*MockBackendCtx) CollectRemoteDuplicateRows 

func (*MockBackendCtx) CollectRemoteDuplicateRows(indexID int64, _ table.Table) error

CollectRemoteDuplicateRows implements BackendCtx.CollectRemoteDuplicateRows interface.

func (*MockBackendCtx) FinishAndUnregisterEngines 

func (*MockBackendCtx) FinishAndUnregisterEngines(_ UnregisterOpt) error

FinishAndUnregisterEngines implements BackendCtx interface.

func (*MockBackendCtx) Flush 

func (*MockBackendCtx) Flush(context.Context, FlushMode) (flushed, imported bool, err error)

Flush implements BackendCtx.Flush interface.

func (*MockBackendCtx) GetCheckpointManager 

func (m *MockBackendCtx) GetCheckpointManager() *CheckpointManager

GetCheckpointManager returns the checkpoint manager attached to the backend context.

func (*MockBackendCtx) GetLocalBackend 

func (m *MockBackendCtx) GetLocalBackend() *local.Backend

GetLocalBackend returns the local backend.

func (*MockBackendCtx) Register 

func (m *MockBackendCtx) Register(indexIDs []int64, _ []bool, _ table.Table) ([]Engine, error)

Register implements BackendCtx.Register interface.

type MockBackendCtxMgr 

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

MockBackendCtxMgr is a mock backend context manager.

func NewMockBackendCtxMgr 

func NewMockBackendCtxMgr(sessCtxProvider func() sessionctx.Context) *MockBackendCtxMgr

NewMockBackendCtxMgr creates a new mock backend context manager.

func (*MockBackendCtxMgr) CheckMoreTasksAvailable 

func (m *MockBackendCtxMgr) CheckMoreTasksAvailable() (bool, error)

CheckMoreTasksAvailable implements BackendCtxMgr.CheckMoreTaskAvailable interface.

func (*MockBackendCtxMgr) EncodeJobSortPath 

func (m *MockBackendCtxMgr) EncodeJobSortPath(int64) string

EncodeJobSortPath implements BackendCtxMgr interface.

func (*MockBackendCtxMgr) Load 

func (m *MockBackendCtxMgr) Load(jobID int64) (BackendCtx, bool)

Load implements BackendCtxMgr.Load interface.

func (*MockBackendCtxMgr) Register 

func (m *MockBackendCtxMgr) Register(ctx context.Context, jobID int64, unique bool, etcdClient *clientv3.Client,
	pdSvcDiscovery pd.ServiceDiscovery, resourceGroupName string, importConc int, initTS uint64) (BackendCtx, error)

Register implements BackendCtxMgr.Register interface.

func (*MockBackendCtxMgr) ResetSessCtx 

func (m *MockBackendCtxMgr) ResetSessCtx()

ResetSessCtx is only used for mocking test.

func (*MockBackendCtxMgr) Unregister 

func (m *MockBackendCtxMgr) Unregister(jobID int64)

Unregister implements BackendCtxMgr.Unregister interface.

type MockEngineInfo 

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

MockEngineInfo is a mock engine info.

func NewMockEngineInfo 

func NewMockEngineInfo(sessCtx sessionctx.Context) *MockEngineInfo

NewMockEngineInfo creates a new mock engine info.

func (*MockEngineInfo) Close 

func (*MockEngineInfo) Close(_ bool)

Close implements Engine.Close interface.

func (*MockEngineInfo) CreateWriter 

func (m *MockEngineInfo) CreateWriter(id int, _ *backend.LocalWriterConfig) (Writer, error)

CreateWriter implements Engine.CreateWriter interface.

func (*MockEngineInfo) Flush 

func (*MockEngineInfo) Flush() error

Flush implements Engine.Flush interface.

func (*MockEngineInfo) SetHook 

func (m *MockEngineInfo) SetHook(onWrite func(key, val []byte))

SetHook set the write hook.

type MockWriteHook 

type MockWriteHook func(key, val []byte)

MockWriteHook the hook for write in mock engine.

type MockWriter 

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

MockWriter is a mock writer.

func (*MockWriter) LockForWrite 

func (*MockWriter) LockForWrite() func()

LockForWrite implements Writer.LockForWrite interface.

func (*MockWriter) WriteRow 

func (m *MockWriter) WriteRow(_ context.Context, key, idxVal []byte, _ kv.Handle) error

WriteRow implements Writer.WriteRow interface.

type ReorgCheckpoint 

type ReorgCheckpoint struct {
	LocalSyncKey   kv.Key `json:"local_sync_key"`
	LocalKeyCount  int    `json:"local_key_count"`
	GlobalSyncKey  kv.Key `json:"global_sync_key"`
	GlobalKeyCount int    `json:"global_key_count"`
	InstanceAddr   string `json:"instance_addr"`

	PhysicalID int64 `json:"physical_id"`
	// TS of next engine ingest.
	TS uint64 `json:"ts"`

	Version int64 `json:"version"`
}

ReorgCheckpoint is the checkpoint for a reorg job.

type UnregisterOpt 

type UnregisterOpt int

UnregisterOpt controls the behavior of backend context unregistering. 

const (
	// OptCloseEngines only closes engines, it does not clean up sort path data.
	OptCloseEngines UnregisterOpt = 1 << iota
	// OptCleanData cleans up local sort dir data.
	OptCleanData
	// OptCheckDup checks if there is duplicate entry for unique indexes.
	OptCheckDup
)

type Writer 

type Writer interface {
	// WriteRow writes one row into downstream.
	// To enable uniqueness check, the handle should be non-empty.
	WriteRow(ctx context.Context, idxKey, idxVal []byte, handle tidbkv.Handle) error
	LockForWrite() (unlock func())
}

Writer is the interface for the writer that can be used to write key-value pairs.

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