分类： LINUX
2005-12-09 15:33:54
The Highest Performing Virtualization Software
Enterprises are embracing Xen for server virtualization because it enables them to increase server utilization, consolidate servers, and dramatically reduce complexity and overall total cost of ownership. Xen is the fastest and most secure virtualization software available today, enabling every server to support multiple virtual servers each with resource guarantees to ensure that its application layer SLA is met.
Server Virtualization with the Xen Hypervisor
With Xen virtualization, a thin software layer known as the Xen hypervisor is inserted between the server’s hardware and the operating system. This provides an abstraction layer that allows each physical server to run one or more “virtual servers,” effectively decoupling the operating system and its applications from the underlying physical server.
Run Applications on Any Server
Once a virtual server image has been created it can run on any server, at any time, and multiple virtual servers can simultaneously share a single server, increasing its utilization while receiving a resource guarantee that ensures that application layer performance criteria are met.
Xen Is an Open Source Technology
The Xen hypervisor is a unique open source technology, developed collaboratively by the world’s best engineers at over 20 of the most innovative data center solution vendors, including Intel, AMD, Cisco, Dell, Egenera, HP, IBM, Mellanox, Network Appliance, Novell, Red Hat, SGI, Sun, Unisys, Veritas, Voltaire, and of course, XenSource. Xen is licensed under the .
And best of all, as an open source technology, Xen is available . XenSource also provides simple tools for the community to download, install, test and develop using Xen.
Xen-Based Virtualization Provides Greater Flexibility and Lower Total Cost of Ownership
Xen enables IT managers to increase utilization of server resources, achieve server consolidation, scale their test & development environments, and achieve greater business continuity through dynamic provisioning. But to scale Xen deployments across the enterprise, users need a comprehensive tool set that enables them to deploy, control and monitor their Xen based data center.
XenSource Sells and Supports Enterprise Solutions Based on Xen
Founded by the original Xen development team, XenSource plays the dual role of leading the open source Xen community, while simultaneously developing, selling, and marketing value-added enterprise solutions based on Xen. These solutions include:
Paravirtualization Provides Near-Native Performance
Xen’s paravirtualization technology is widely acknowledged as the fastest and most secure virtualization software in the industry. Xen offers near-native performance for virtual servers with up to 10 times less overhead than proprietary offerings, and benchmarked overhead of well under 5% in most cases compared to 35% or higher overhead rates for other virtualization technologies.
Xen 3.0 Brings Features for Today’s Enterprise Servers
With the 3.0 release, Xen extends its feature leadership with functionality required to virtualize the servers found in today’s enterprise data centers. New features include:
Lean and Secure
Xen is exceptionally lean-- less than 50,000 lines of code. That translates to extremely low overhead and near-native performance for guests. Xen re-uses existing device drivers (both closed and open source) from Linux, making device management easy. Moreover Xen is robust to device driver failure and protects both guests and the hypervisor from faulty or malicious drivers.
Fastest Live Relocation
Xen's live relocation capability, combined with its extraordinary performance, have led analysts to pronounce it the first virtualization technology that is capable of being deployed in the heart of the data-center, bringing the benefits of server consolidation and increased utilization to the vast majority of servers in the enterprise.
Utility Based Computing
Xen is a key enabler in enterprises' aspirations towards a utility-based computing model, in which any server can run any operating system and any application, at any time, with dynamic load balancing of resources both within each server, between the guests, and across servers.
Per VM Resource Guarantees
Xen provides superb resource partitioning, for CPU, memory, and block and network I/O. This resource protection model leads to improved security because guests and drivers are DoS-proof. Xen is fully open to scrutiny by the security community and its security is continuously tested. Xen is also the foundation for a Multi-Level Secure system architecture being developed by XenSource, IBM and Intel.
An Emerging Open Industry Standard
Xen enjoys extraordinary community support. It is a de-facto, industry endorsed open source virtualization standard backed by the industry's leading enterprise solution vendors.
Xen is, and always will be, open sourced, uniting the industry and the Xen ecosystem to speed the adoption of virtualization in the enterprise.
