Modern Virtual Machines (VMs) can be opaque to conventional performance management tools because VM technology has surpassed standard measurement paradigms. The paper attempt to ameliorate that problem by; observing that disparate types of VMs lie on a discrete spectrum bounded by hyperthreading at one extreme and GRID-like services at the other, and; recognizing that poll-based scheduling is the common architectural element in many VM implementations. The associated polling frequency (from GHz to pHz) positions each VM in its respective region of the VM-spectrum. Several case studies are analyzed to illustrate how this insight can make VMs more visible to performance management techniques.
Did you find this white paper useful?
29 out of 50 users found this white paper useful
Related white papers
Fibre Channel in a Disaster-Tolerant OpenVMS Cluster System
Fibre Channel is the first OpenVMS storage interconnect that is capable of spanning long distances. This new technology can be incorporated into the well-established OpenVMS multisite cluster product to provide...
X.25 Connectivity Options for OpenVMS Alpha
Connections to X.25 networks typically require payment of a line rental. If a number of systems need connectivity to X.25 networks then it can be more economical to connect a...
Migrating an Application from OpenVMS VAX to OpenVMS Alpha
For many applications, migrating from OpenVMS VAX to OpenVMS Alpha is straightforward. If your application runs only in user mode and is written in a standard high-level language, you most...
OpenVMS Futures
OpenVMS customers can be assured that future directions of the operating system will continue to support them in reliably managing their data as it grows into the 21st century. The...
OpenVMS and Windows NT: Working Together
OpenVMS and Windows NT, in particular, complement each other and work together in an integrated environment. Today, OpenVMS is Digital’s premier production commercial operating system. Windows NT will begin by...
Reducing Business Risk with the New Compaq AlphaServer GS Series Running OpenVMS
Compaq OpenVMS on the new AlphaServer GS series enables effective, proactive IT change management by providing the resilience to interruptions, response to unpredictable demand, and high performance required to keep...
VAX to the Future: the Path Forward for the VAX Customer Base
Compaq’s approach to fortifying OpenVMS with even greater levels of scalability, availability, and reliability is exemplified by the Galaxy Software Architecture. The Galaxy architecture’s Adaptive Partitioned Multiprocessing (APMP) environment uniquely...
