# Cassandra

Cassandra Migration in [sunbird-utils](https://github.com/sunbird-lern/sunbird-utils) needs to be run before LMS service setup to create necessary tables required in **sunbird** keyspace and **sunbird\_courses** keyspace. 

{% embed url="<https://lern.sunbird.org/learn/data-dictionary/user-org-service/page-management>" %}
LMS Data dictionary for sunbird keyspace
{% endembed %}

{% embed url="<https://lern.sunbird.org/learn/data-dictionary/course-batch-service>" %}
LMS Data dictionary for sunbird\_courses keyspace
{% endembed %}

## **ER Diagram for sunbird\_courses keyspace**

![Sunbird Courses](/files/4Z8LLCyRyfscmzXOGsyC)


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