Date Added: Sep 2012
The facility to rollback a collection of changes, i.e., reverting to a previous acceptable state, a checkpoint, is widely recognized as valuable support for dependability. This paper considers the particular needs of users of cloud computing resources, wishing to manage the resources. Cloud computing provides infrastructure programmatically managed through a fixed set of simple system administration commands. For instance, creating and configuring a virtualized Web server on Amazon Web Services (AWS) can be done with a few calls to operations that are offered through the AWS management API.