storage

package
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 Go to latest Published: Dec 25, 2024 License: Apache-2.0 Imports: 22 Imported by: 0

Documentation

Index

Constants

View Source 
const (

	// TaskColumns is the columns for task.
	// TODO: dispatcher_id will update to scheduler_id later
	TaskColumns = basicTaskColumns + `, t.start_time, t.state_update_time, t.meta, t.dispatcher_id, t.error, t.modify_params`
	// InsertTaskColumns is the columns used in insert task.
	InsertTaskColumns = `task_key, type, state, priority, concurrency, step, meta, create_time, target_scope`

	// SubtaskColumns is the columns for subtask.
	SubtaskColumns = basicSubtaskColumns + `, state_update_time, meta, summary`
	// InsertSubtaskColumns is the columns used in insert subtask.
	InsertSubtaskColumns = `step, task_key, exec_id, meta, state, type, concurrency, ordinal, create_time, checkpoint, summary`
)

Variables

View Source 
var (

	// ErrUnstableSubtasks is the error when we detected that the subtasks are
	// unstable, i.e. count, order and content of the subtasks are changed on
	// different call.
	ErrUnstableSubtasks = errors.New("unstable subtasks")

	// ErrTaskNotFound is the error when we can't found task.
	// i.e. TransferTasks2History move task from tidb_global_task to tidb_global_task_history.
	ErrTaskNotFound = errors.New("task not found")

	// ErrTaskAlreadyExists is the error when we submit a task with the same task key.
	// i.e. SubmitTask in handle may submit a task twice.
	ErrTaskAlreadyExists = errors.New("task already exists")

	// ErrTaskStateNotAllow is the error when the task state is not allowed to do the operation.
	ErrTaskStateNotAllow = errors.New("task state not allow to do the operation")

	// ErrTaskChanged is the error when task changed by other operation.
	ErrTaskChanged = errors.New("task changed by other operation")

	// ErrSubtaskNotFound is the error when can't find subtask by subtask_id and execId,
	// i.e. scheduler change the subtask's execId when subtask need to balance to other nodes.
	ErrSubtaskNotFound = errors.New("subtask not found")
)
View Source 
var TestChannel = make(chan struct{})

TestChannel is used for test.

View Source 
var (
	// TestLastTaskID is used for test to set the last task ID.
	TestLastTaskID atomic.Int64
)

Functions

func Row2SubTask 

func Row2SubTask(r chunk.Row) *proto.Subtask

Row2SubTask converts a row to a subtask.

func Row2Task 

func Row2Task(r chunk.Row) *proto.Task

Row2Task converts a row to a task.

func SetTaskManager 

func SetTaskManager(is *TaskManager)

SetTaskManager sets the task manager.

Types

type SessionExecutor 

type SessionExecutor interface {
	// WithNewSession executes the function with a new session.
	WithNewSession(fn func(se sessionctx.Context) error) error
	// WithNewTxn executes the fn in a new transaction.
	WithNewTxn(ctx context.Context, fn func(se sessionctx.Context) error) error
}

SessionExecutor defines the interface for executing SQLs in a session.

type TaskExecInfo 

type TaskExecInfo struct {
	*proto.TaskBase
	// SubtaskConcurrency is the concurrency of subtask in current task step.
	// TODO: will be used when support subtask have smaller concurrency than task,
	// TODO: such as post-process of import-into. Also remember the 'modifying' state
	// also update subtask concurrency.
	// TODO: we might need create one task executor for each step in this case, to alloc
	// TODO: minimal resource
	SubtaskConcurrency int
}

TaskExecInfo is the execution information of a task, on some exec node.

type TaskHandle 

type TaskHandle interface {
	// GetPreviousSubtaskMetas gets previous subtask metas.
	GetPreviousSubtaskMetas(taskID int64, step proto.Step) ([][]byte, error)
	SessionExecutor
}

TaskHandle provides the interface for operations needed by Scheduler. Then we can use scheduler's function in Scheduler interface.

type TaskManager 

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

TaskManager is the manager of task and subtask.

func GetTaskManager 

func GetTaskManager() (*TaskManager, error)

GetTaskManager gets the task manager.

func NewTaskManager 

func NewTaskManager(sePool util.SessionPool) *TaskManager

NewTaskManager creates a new task manager.

func (*TaskManager) AdjustTaskOverflowConcurrency 

func (mgr *TaskManager) AdjustTaskOverflowConcurrency(ctx context.Context, se sessionctx.Context) error

AdjustTaskOverflowConcurrency change the task concurrency to a max value supported by current cluster. This is a workaround for an upgrade bug: in v7.5.x, the task concurrency is hard-coded to 16, resulting in a stuck issue if the new version TiDB has less than 16 CPU count. We don't adjust the concurrency in subtask table because this field does not exist in v7.5.0. For details, see https://github.com/pingcap/tidb/issues/50894. For the following versions, there is a check when submitting a new task. This function should be a no-op.

func (*TaskManager) CancelSubtask 

func (mgr *TaskManager) CancelSubtask(ctx context.Context, execID string, taskID int64) error

CancelSubtask update the task's subtasks' state to canceled.

func (*TaskManager) CancelTask 

func (mgr *TaskManager) CancelTask(ctx context.Context, taskID int64) error

CancelTask cancels task.

func (*TaskManager) CancelTaskByKeySession 

func (*TaskManager) CancelTaskByKeySession(ctx context.Context, se sessionctx.Context, taskKey string) error

CancelTaskByKeySession cancels task by key using input session.

func (*TaskManager) CreateTask 

func (mgr *TaskManager) CreateTask(ctx context.Context, key string, tp proto.TaskType, concurrency int, targetScope string, meta []byte) (taskID int64, err error)

CreateTask adds a new task to task table.

func (*TaskManager) CreateTaskWithSession 

func (mgr *TaskManager) CreateTaskWithSession(
	ctx context.Context,
	se sessionctx.Context,
	key string,
	tp proto.TaskType,
	concurrency int,
	targetScope string,
	meta []byte,
) (taskID int64, err error)

CreateTaskWithSession adds a new task to task table with session.

func (*TaskManager) DeleteDeadNodes 

func (mgr *TaskManager) DeleteDeadNodes(ctx context.Context, nodes []string) error

DeleteDeadNodes deletes the dead nodes from mysql.dist_framework_meta.

func (*TaskManager) ExecuteSQLWithNewSession 

func (mgr *TaskManager) ExecuteSQLWithNewSession(ctx context.Context, sql string, args ...any) (rs []chunk.Row, err error)

ExecuteSQLWithNewSession executes one SQL with new session.

func (*TaskManager) FailSubtask 

func (mgr *TaskManager) FailSubtask(ctx context.Context, execID string, taskID int64, err error) error

FailSubtask update the task's subtask state to failed and set the err.

func (*TaskManager) FailTask 

func (mgr *TaskManager) FailTask(ctx context.Context, taskID int64, currentState proto.TaskState, taskErr error) error

FailTask implements the scheduler.TaskManager interface.

func (*TaskManager) FinishSubtask 

func (mgr *TaskManager) FinishSubtask(ctx context.Context, execID string, id int64, meta []byte) error

FinishSubtask updates the subtask meta and mark state to succeed.

func (*TaskManager) GCSubtasks 

func (mgr *TaskManager) GCSubtasks(ctx context.Context) error

GCSubtasks deletes the history subtask which is older than the given days.

func (*TaskManager) GetActiveSubtasks 

func (mgr *TaskManager) GetActiveSubtasks(ctx context.Context, taskID int64) ([]*proto.SubtaskBase, error)

GetActiveSubtasks implements TaskManager.GetActiveSubtasks.

func (*TaskManager) GetAllNodes 

func (mgr *TaskManager) GetAllNodes(ctx context.Context) ([]proto.ManagedNode, error)

GetAllNodes gets nodes in dist_framework_meta.

func (*TaskManager) GetAllSubtasks 

func (mgr *TaskManager) GetAllSubtasks(ctx context.Context) ([]*proto.SubtaskBase, error)

GetAllSubtasks gets all subtasks with basic columns.

func (*TaskManager) GetAllSubtasksByStepAndState 

func (mgr *TaskManager) GetAllSubtasksByStepAndState(ctx context.Context, taskID int64, step proto.Step, state proto.SubtaskState) ([]*proto.Subtask, error)

GetAllSubtasksByStepAndState gets the subtask by step and state.

func (*TaskManager) GetCPUCountOfNode 

func (mgr *TaskManager) GetCPUCountOfNode(ctx context.Context) (int, error)

GetCPUCountOfNode gets the cpu count of node.

func (*TaskManager) GetFirstSubtaskInStates 

func (mgr *TaskManager) GetFirstSubtaskInStates(ctx context.Context, tidbID string, taskID int64, step proto.Step, states ...proto.SubtaskState) (*proto.Subtask, error)

GetFirstSubtaskInStates gets the first subtask by given states.

func (*TaskManager) GetSubtaskCntGroupByStates 

func (mgr *TaskManager) GetSubtaskCntGroupByStates(ctx context.Context, taskID int64, step proto.Step) (map[proto.SubtaskState]int64, error)

GetSubtaskCntGroupByStates gets the subtask count by states.

func (*TaskManager) GetSubtaskErrors 

func (mgr *TaskManager) GetSubtaskErrors(ctx context.Context, taskID int64) ([]error, error)

GetSubtaskErrors gets subtasks' errors.

func (*TaskManager) GetSubtaskRowCount 

func (mgr *TaskManager) GetSubtaskRowCount(ctx context.Context, taskID int64, step proto.Step) (int64, error)

GetSubtaskRowCount gets the subtask row count.

func (*TaskManager) GetSubtasksByExecIDAndStepAndStates 

func (mgr *TaskManager) GetSubtasksByExecIDAndStepAndStates(ctx context.Context, execID string, taskID int64, step proto.Step, states ...proto.SubtaskState) ([]*proto.Subtask, error)

GetSubtasksByExecIDAndStepAndStates gets all subtasks by given states on one node.

func (*TaskManager) GetSubtasksWithHistory 

func (mgr *TaskManager) GetSubtasksWithHistory(ctx context.Context, taskID int64, step proto.Step) ([]*proto.Subtask, error)

GetSubtasksWithHistory gets the subtasks from tidb_global_task and tidb_global_task_history.

func (*TaskManager) GetTaskBaseByID 

func (mgr *TaskManager) GetTaskBaseByID(ctx context.Context, taskID int64) (task *proto.TaskBase, err error)

GetTaskBaseByID implements the TaskManager.GetTaskBaseByID interface.

func (*TaskManager) GetTaskBaseByIDWithHistory 

func (mgr *TaskManager) GetTaskBaseByIDWithHistory(ctx context.Context, taskID int64) (task *proto.TaskBase, err error)

GetTaskBaseByIDWithHistory gets the task by the task ID from both tidb_global_task and tidb_global_task_history.

func (*TaskManager) GetTaskBaseByKeyWithHistory 

func (mgr *TaskManager) GetTaskBaseByKeyWithHistory(ctx context.Context, key string) (task *proto.TaskBase, err error)

GetTaskBaseByKeyWithHistory gets the task base from history table by the task key.

func (*TaskManager) GetTaskByID 

func (mgr *TaskManager) GetTaskByID(ctx context.Context, taskID int64) (task *proto.Task, err error)

GetTaskByID gets the task by the task ID.

func (*TaskManager) GetTaskByIDWithHistory 

func (mgr *TaskManager) GetTaskByIDWithHistory(ctx context.Context, taskID int64) (task *proto.Task, err error)

GetTaskByIDWithHistory gets the task by the task ID from both tidb_global_task and tidb_global_task_history.

func (*TaskManager) GetTaskByKey 

func (mgr *TaskManager) GetTaskByKey(ctx context.Context, key string) (task *proto.Task, err error)

GetTaskByKey gets the task by the task key.

func (*TaskManager) GetTaskByKeyWithHistory 

func (mgr *TaskManager) GetTaskByKeyWithHistory(ctx context.Context, key string) (task *proto.Task, err error)

GetTaskByKeyWithHistory gets the task from history table by the task key.

func (*TaskManager) GetTaskExecInfoByExecID 

func (mgr *TaskManager) GetTaskExecInfoByExecID(ctx context.Context, execID string) ([]*TaskExecInfo, error)

GetTaskExecInfoByExecID implements the scheduler.TaskManager interface.

func (*TaskManager) GetTasksInStates 

func (mgr *TaskManager) GetTasksInStates(ctx context.Context, states ...any) (task []*proto.Task, err error)

GetTasksInStates gets the tasks in the states(order by priority asc, create_time acs, id asc).

func (*TaskManager) GetTopUnfinishedTasks 

func (mgr *TaskManager) GetTopUnfinishedTasks(ctx context.Context) ([]*proto.TaskBase, error)

GetTopUnfinishedTasks implements the scheduler.TaskManager interface.

func (*TaskManager) GetUsedSlotsOnNodes 

func (mgr *TaskManager) GetUsedSlotsOnNodes(ctx context.Context) (map[string]int, error)

GetUsedSlotsOnNodes implements the scheduler.TaskManager interface.

func (*TaskManager) InitMeta 

func (mgr *TaskManager) InitMeta(ctx context.Context, tidbID string, role string) error

InitMeta insert the manager information into dist_framework_meta.

func (*TaskManager) InitMetaSession 

func (*TaskManager) InitMetaSession(ctx context.Context, se sessionctx.Context, execID string, role string) error

InitMetaSession insert the manager information into dist_framework_meta. if the record exists, update the cpu_count and role.

func (*TaskManager) ModifiedTask 

func (mgr *TaskManager) ModifiedTask(ctx context.Context, task *proto.Task) error

ModifiedTask implements the scheduler.TaskManager interface.

func (*TaskManager) ModifyTaskByID 

func (mgr *TaskManager) ModifyTaskByID(ctx context.Context, taskID int64, param *proto.ModifyParam) error

ModifyTaskByID modifies the task by the task ID.

func (*TaskManager) PauseSubtasks 

func (mgr *TaskManager) PauseSubtasks(ctx context.Context, execID string, taskID int64) error

PauseSubtasks update all running/pending subtasks to pasued state.

func (*TaskManager) PauseTask 

func (mgr *TaskManager) PauseTask(ctx context.Context, taskKey string) (bool, error)

PauseTask pauses the task.

func (*TaskManager) PausedTask 

func (mgr *TaskManager) PausedTask(ctx context.Context, taskID int64) error

PausedTask update the task state from pausing to paused.

func (*TaskManager) RecoverMeta 

func (mgr *TaskManager) RecoverMeta(ctx context.Context, execID string, role string) error

RecoverMeta insert the manager information into dist_framework_meta. if the record exists, update the cpu_count. Don't update role for we only update it in `set global tidb_service_scope`. if not there might has a data race.

func (*TaskManager) ResumeSubtasks 

func (mgr *TaskManager) ResumeSubtasks(ctx context.Context, taskID int64) error

ResumeSubtasks update all paused subtasks to pending state.

func (*TaskManager) ResumeTask 

func (mgr *TaskManager) ResumeTask(ctx context.Context, taskKey string) (bool, error)

ResumeTask resumes the task.

func (*TaskManager) ResumedTask 

func (mgr *TaskManager) ResumedTask(ctx context.Context, taskID int64) error

ResumedTask implements the scheduler.TaskManager interface.

func (*TaskManager) RevertTask 

func (mgr *TaskManager) RevertTask(ctx context.Context, taskID int64, taskState proto.TaskState, taskErr error) error

RevertTask implements the scheduler.TaskManager interface.

func (*TaskManager) RevertedTask 

func (mgr *TaskManager) RevertedTask(ctx context.Context, taskID int64) error

RevertedTask implements the scheduler.TaskManager interface.

func (*TaskManager) RunningSubtasksBack2Pending 

func (mgr *TaskManager) RunningSubtasksBack2Pending(ctx context.Context, subtasks []*proto.SubtaskBase) error

RunningSubtasksBack2Pending implements the taskexecutor.TaskTable interface.

func (*TaskManager) StartSubtask 

func (mgr *TaskManager) StartSubtask(ctx context.Context, subtaskID int64, execID string) error

StartSubtask updates the subtask state to running.

func (*TaskManager) SucceedTask 

func (mgr *TaskManager) SucceedTask(ctx context.Context, taskID int64) error

SucceedTask update task state from running to succeed.

func (*TaskManager) SwitchTaskStep 

func (mgr *TaskManager) SwitchTaskStep(
	ctx context.Context,
	task *proto.Task,
	nextState proto.TaskState,
	nextStep proto.Step,
	subtasks []*proto.Subtask,
) error

SwitchTaskStep implements the scheduler.TaskManager interface.

func (*TaskManager) SwitchTaskStepInBatch 

func (mgr *TaskManager) SwitchTaskStepInBatch(
	ctx context.Context,
	task *proto.Task,
	nextState proto.TaskState,
	nextStep proto.Step,
	subtasks []*proto.Subtask,
) error

SwitchTaskStepInBatch implements the scheduler.TaskManager interface.

func (*TaskManager) TransferSubtasks2HistoryWithSession 

func (*TaskManager) TransferSubtasks2HistoryWithSession(ctx context.Context, se sessionctx.Context, taskID int64) error

TransferSubtasks2HistoryWithSession transfer the selected subtasks into tidb_background_subtask_history table by taskID.

func (*TaskManager) TransferTasks2History 

func (mgr *TaskManager) TransferTasks2History(ctx context.Context, tasks []*proto.Task) error

TransferTasks2History transfer the selected tasks into tidb_global_task_history table by taskIDs.

func (*TaskManager) UpdateSubtaskRowCount 

func (mgr *TaskManager) UpdateSubtaskRowCount(ctx context.Context, subtaskID int64, rowCount int64) error

UpdateSubtaskRowCount updates the subtask row count.

func (*TaskManager) UpdateSubtaskStateAndError 

func (mgr *TaskManager) UpdateSubtaskStateAndError(
	ctx context.Context,
	execID string,
	id int64, state proto.SubtaskState, subTaskErr error) error

UpdateSubtaskStateAndError updates the subtask state.

func (*TaskManager) UpdateSubtasksExecIDs 

func (mgr *TaskManager) UpdateSubtasksExecIDs(ctx context.Context, subtasks []*proto.SubtaskBase) error

UpdateSubtasksExecIDs update subtasks' execID.

func (*TaskManager) WithNewSession 

func (mgr *TaskManager) WithNewSession(fn func(se sessionctx.Context) error) error

WithNewSession executes the function with a new session.

func (*TaskManager) WithNewTxn 

func (mgr *TaskManager) WithNewTxn(ctx context.Context, fn func(se sessionctx.Context) error) error

WithNewTxn executes the fn in a new transaction.

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