Note
This view is available starting with V4.2.0.
Purpose
This view displays the Transfer tasks that are currently being executed in the current tenant.
Columns
Column |
Type |
Nullable? |
Description |
|---|---|---|---|
| TASK_ID | bigint(20) | NO | The ID of the Transfer task. |
| CREATE_TIME | timestamp(6) | YES | The time when the task was created. |
| MODIFY_TIME | timestamp(6) | YES | The time when the task was last modified. |
| SRC_LS | bigint(20) | NO | The log stream of the source end (the log stream generated by the data source). |
| DEST_LS | bigint(20) | NO | The log stream of the destination end. |
| PART_LIST | longtext | YES | The list of partitions, including user table partitions and global index partitions. |
| PART_COUNT | bigint(20) | YES | The number of partitions in the partition list. |
| NOT_EXIST_PART_LIST | longtext | YES | The list of partitions that are planned to be executed in the current task but do not exist when the lock is acquired. |
| LOCK_CONFLICT_PART_LIST | longtext | YES | The list of partitions that are planned to be executed in the current task but encounter lock conflicts when the lock is acquired. |
| TABLE_LOCK_TABLET_LIST | longtext | YES | The list of tablets of table locks at the partition level that are successfully locked when the task enters the START state. This list contains only tablets corresponding to partitions in the PART_LIST. |
| TABLET_LIST | longtext | YES | The complete list of tablets involved in the current Transfer operation. This list includes not only the tablets in the PART_LIST but also tablets associated with local index tables and LOB auxiliary tables. |
| TABLET_COUNT | bigint(20) | YES | The number of tablets in the tablet list. |
| START_SCN | bigint(20) unsigned | YES | The SCN when the Transfer operation was initiated. |
| FINISH_SCN | bigint(20) unsigned | YES | The SCN when the Transfer operation was completed. |
| STATUS | varchar(64) | NO | The status of the task. Valid values: INIT, START, DOING, ABORTED, COMPLETED, FAILED, and CANCELED.
|
| TRACE_ID | varchar(64) | NO | The trace ID of the entire task. |
| RESULT | bigint(20) | YES | The result of the task. |
| BALANCE_TASK_ID | bigint(20) | NO | The ID of the associated load balancing task. This Transfer task is a subtask generated by the corresponding load balancing task. |
| TABLE_LOCK_OWNER_ID | bigint(20) | YES | When a table lock is acquired, the system generates an owner_id for each table lock to identify the owner of the table lock. When a table lock is released, the corresponding owner_id must be provided to enable the system to correctly identify and release the table lock. |
| COMMENT | longtext | YES | The comment. This column records the reason for the current stall, diagnostic information, and the failure status of the task. |
References
To view all tenant-level load balancing tasks (Task):
To view all tenant-level log stream load balancing jobs (Job):
To view all tenant-level log stream load balancing tasks (Task):
To view all tenant-level Transfer partition tasks (Task):
For more information about data load balancing, see Data load balancing.