# 4 Maintenance
#### Overview
In the *Configuration → Maintenance* section users can configure and
maintain maintenance periods for hosts.
A listing of existing maintenance periods with their details is
displayed.
From the dropdown to the right in the *Maintenance periods* bar you can
choose whether to display all maintenance periods or only those
belonging to one particular group.
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Displayed data:
|Column|Description|
|------|-----------|
|*Name*|Name of the maintenance period. Clicking on the maintenance period name opens the maintenance period [configuration form](/fr/manual/maintenance#configuration).|
|*Type*|The type of maintenance is displayed: *With data collection* or *No data collection*|
|*Active since*|The date and time when executing maintenance periods becomes active.|
|*Active till*|The date and time when executing maintenance periods stops being active.|
|*State*|The state of the maintenance period:
**Approaching** - will become active soon
**Active** - is active
**Expired** - is not active any more|
|*Description*|Description of the maintenance period is displayed.|
*Name*, *Type*, *Active since* and *Active till* are sortable columns
that can be sorted in ascending/descending order. To sort, click on the
column name.
To configure a new maintenance period, click on the *Create maintenance
period* button in the top right-hand corner.
##### Mass editing options
A button below the list offers one mass-editing option:
- *Delete* - delete the maintenance periods
To use this option, mark the checkboxes before the respective
maintenance periods and click on *Delete*.
##### Filter
As the list may contain a number of maintenance periods, it may be
needed to filter out the ones you really need.
The *Filter* link is available above the list of maintenance periods. If
you click on it, a filter becomes available where you can filter
maintenance periods by name and state.
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