Showing papers by "Jose Renato Santos published in 2006"

Performance models for virtualized applications

Abstract: This paper develops a series of performance models for predicting performance of applications on virtualized systems It introduces the main ideas of performance modeling and presents a complete case study of an application running on Linux that is migrated to a virtualized environment consisting of Linux and Xen The paper describes the models, the process of obtaining measurements for the models and calculates performance metrics for the two environments A validation of the results is also discussed in the paper

Method of migrating process domain

Abstract: An embodiment of a method of migrating the process domain includes attaching a process-domain interface that includes an internet protocol address to the process domain. The process-domain interface along with the process domain is moved from a first host to a second host.

Method of restoring communication state of process

Abstract: An embodiment of a method of restoring a communication state of a process includes creating a new socket for a socket saved as part of a checkpoint of the communication state. The new socket is initialized with an adjusted transmission control protocol state saved as part of the checkpoint. The adjusted transmission control protocol state indicates that a send buffer and a receive buffer are empty. Send data saved as part of the checkpoint is written into the new socket. Receive data saved as part of the checkpoint is written into a restart buffer. While at least a portion of the receive data remains in the restart buffer, a socket read system call for the new socket is redirected to read the receive data that remains in the restart buffer.