====Backfill====

**arditrigger.Backfill** is used to start back-filling data using your trigger(s).

You can also use **BackfillLocal** to pass local (rather than UTC) dates.

===Parameters===

^Name^Default^Meaning^
|host|localhost|The ARDI host name|
|site|default|The ARDI database/site|
|fdate||The **from** date and time, in UTC*|
|tdate||The **to** date and time, in UTC*|
|servicename|ARDI Trigger|The name of the application (used in outputs)|
|outputconfig|config.json|The file name containing the modular output system settings|

===Description===

This function starts processing your triggers using historical information. 

Note that this may take some time, depending on the amount of time and data required.

* The **Backfill** command uses UTC times, while the **BackfillLocal** command is expected to take local times and dates.

===Example===

<code>
arditrigger.Backfill("myserver","mysite",datetime.datetime.now() - timedelta(days=1))
</code>

//This function backfills data for the last calendar day.//

===See Also===

[[Start|Start]] and [[Interactive|Interactive]].