30 lines
1.3 KiB
Markdown
30 lines
1.3 KiB
Markdown
---
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layout: documentation
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title: Settings - Persistence
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---
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# Settings - Persistence
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<!-- START MAINUI SIDEBAR DOC - DO NOT REMOVE -->
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**Persistence** stores data over time.
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The data may be retrieved at a later time, for example to restore your system after startup, or to prepare graphs for display on the UI.
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openHAB ships with the [RRD4J persistence service](/addons/persistence/rrd4j/) installed by default, which persists every Item on every state change and at least once a minute.
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Additionally, it restores the last stored value at system startup.
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Learn more about persistence in the [persistence docs]({{base}}/configuration/persistence.html).
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To change this behaviour, this is the page you are looking for!
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Here you can:
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- Set the **default persistence service**.
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- **Configure Persistence Policies**<br>
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For each installed persistence service, a list entry is added.
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Clicking on a persistence service from that list opens a page to create a new one or edit the existing persistence configuration of that persistence service.
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- **Install more persistence add-ons**<br>
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Click on the <!--F7:green plus_circle_fill --> plus button to switch to the add-ons store and install more persistence services.
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<!-- END MAINUI SIDEBAR DOC - DO NOT REMOVE -->
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