The service contract between cloud provider and consumer: Consistency properties

There is a wide diversity of choices for a consumer who needs a data store to hold the information for a cloud-hosted application. Some stores are run as services by the cloud provider, others may be deployed and administered directly by the cloud consumer in infrastructure from the cloud provider. Some stores use a document model, others are relational, or graph, or they may even offer just a key-value CRUD interface. In this talk, we focus on the consistency properties. What can the consumer be confident of, when several operations are performed on the same data? We aim to help the consumer make some sense of the many alternatives from real systems and from research proposals.