Persisting Data for Batch Analytics

After creating an event stream you can persist it by creating a corresponding table in the WSO2 Data Access Layer.  Follow the steps below to persist an event stream.

1. Log in to the management console using the following URL: https://<DAS_HOST>:<DAS_PORT>/carbon/
2. Click Main, and then click Streams.
3. Click Edit of the corresponding event stream which you want to persist.
4. Click Next [Persist Event].
5. Select the Persist Event Stream check box to allow the events in the stream to be persisted. 
6. In the Record Store field, select EVENT_STORE from the list.
7. For each of the attribute types, do the following as required to define the schema of the event stream as shown below.
   

• Select Persist Attribute, if you want to persist a particular attribute.

• Select Primary Key, to define an attribute type as a primary key.

• Select Index Column, to enable an attribute type to be applied in searches.

• Select Score Param, to define an attribute as a score parameter. For more information on score parameters, see Searching for Data.
• Select the Is a Facet check box if you want to persist an attribute as a facet. For more information on facets, see Searching for Data.
• Define and add any Arbitrary Data Attributes which you want to persist.
8. Click Save Event Stream to persist the event stream.