VMware ESX Server provides strong security and performance isolation for virtual machine storage. Each virtual machine sees only the virtual disks that have been presented to its virtual SCSI adapters. Virtual machines cannot see the physical Fibre Channel HBAs on the ESX Server host on which they run. Nor, in typical use cases, do they see the LUNs on which their virtual disks reside. Emerging...

The performance of three Hadoop applications is reported for several virtual configurations on VMware vSphere 5 and compared to native configurations. A well-balanced seven-node AMAX ClusterMax system was used to show that the average performance difference between native and the simplest virtualized configurations is only 4%. Further, the flexibility enabled by virtualization to create multipl...

In this paper we analyze important problems of distributing a set of applications among physical servers, and modeling contention between the VMware guests. Taking into account the factor that different applications may have different peak times, different resource consumption patterns, and different importance levels may significantly improve overall system performance, and QoS. This paper pre...

VMware ESX Server is a thin software layer designed to multiplex hardware resources efficiently among virtual machines running unmodified commodity operating systems. In many computing environments, individual servers are underutilized, allowing them to be consolidated as virtual machines on a single physical server with little or no impact on performance. Similarly, many small servers can be c...