**3.3 Methods to achieve required cloud service availability**

With the aim of meeting the required service availability, the service provider should build a resilient cloud infrastructure. Building a resilient cloud infrastructure requires the following high availability solutions:


For example when a disaster occurred at one of the service provider's data center, then BC triggers the DR process. This process typically involves both operational personnel and automated procedure in order to reactivate the service (application) at a functioning data center. This requires the transfer of application users, data, and services to the new data center. This involves the use of redundant infrastructure across different geographic locations, live migration, backup, and replication solutions.
