Vacuum Element (ADF)
Contains settings used by the data removal process, which removes obsolete event and notification data from the application database.
语法
<ApplicationExecutionSettings>
...
<Vacuum>
Element Characteristics
| Characteristic | Description |
|---|---|
Data type |
None. |
Default value |
None. |
Occurrence |
Optional once per ApplicationExecutionSettings element. |
Updates |
Can be added and deleted when updating the application. |
Element Relationships
| Relationship | Elements |
|---|---|
Parent element |
|
Child elements |
备注
Vacuuming removes obsolete event and notification data from the application database. For more information about the vacuuming process, see 删除过时的应用程序数据.
Vacuuming schedules cannot overlap. If schedules overlap, Notification Services stops the earlier vacuuming process before the later one starts.
If you omit the Vacuum element and its child elements, the vacuuming process does not run and obsolete data is not automatically removed from the application database.
示例
The following example shows how to define a data retention age of three days (P3DT00H00M00S) and to configure the vacuuming process to run from 3:00 A.M. to 5:00 A.M. (UTC) and from 11:00 P.M. to 1:00 A.M. (UTC) every day.
<Vacuum>
<RetentionAge>P3DT00H00M00S</RetentionAge>
<VacuumSchedule>
<Schedule>
<StartTime>23:00:00</StartTime>
<Duration>P0DT02H00M00S</Duration>
</Schedule>
<Schedule>
<StartTime>03:00:00</StartTime>
<Duration>P0DT02H00M00S</Duration>
</Schedule>
</VacuumSchedule>
</Vacuum>
请参阅
参考
Application Definition File Reference