A server system receives an electronic document from a client system to be stored at a content management system. The server system generates multiple copies of the electronic document that are stored in parallel at respective multiple instances of the content management system. The server system receives a request to retrieve a copy of the electronic document. In response to the request, the server system checks, by a load balancer, whether the respective multiple instances of the content management system are operational to retrieve the copy of the electronic document. The server system then performs load balancing by the load balancer in accordance with a round-robin process to select a particular instance and retrieves the copy of the electronic document from the particular instance of the content management system.