Red Hat Enterprise Linux: The Business OS for Flexibility and Value

The choice for reducing operating costs and providing a secure, reliable, scalable operating system.

By Brian Stevens, CTO and vice president of engineering, Red Hat
Fri, November 16, 2007

CIO — Today's IT departments need to do more, with less budget. They need to rapidly develop and deploy new applications. They need to build a flexible infrastructure—one that can rapidly adjust to the needs of the business. There are many key benefits inherent in Red Hat Enterprise Linux.

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Cost Savings

The latest release of Red Hat Enterprise Linux, version 5, often coupled with other Red Hat open-source solutions, transforms the economics of IT by eliminating the need to purchase, integrate and maintain the proprietary server software stack. Customers today deploy many expensive software components on their servers: clustered file systems, volume managers, virtualization, application servers and the like, which cost thousands of dollars per server. With Red Hat Enterprise Linux, many of these capabilities are included for no additional cost, freeing up hundreds of thousands of dollars of budget—which can be used to deliver new applications, improve service levels and train staff. The goal is to disrupt the economics and to free budget that CIOs can reallocate to close the capabilities gap. For example, virtualization, storage management and high availability capabilities are all integrated into the Red Hat Enterprise Linux Advanced Platform.

Virtualization

A primary goal of Red Hat Enterprise Linux Advanced Platform was to make virtualization simple and practical in real-world deployments. Consequently, the product includes both server and storage virtualization and a powerful system management infrastructure.

One of the great features of virtualization is the ability to move virtual machines from one physical server to another in real time, called live migration.

In the latest version of Red Hat Enterprise Linux:

Virtualization is provided in all server products and is optionally available for client products.
Storage and extended server virtualization are provided with Red Hat Enterprise Linux Advanced Platform.
Red Hat Network supports virtualized guest operating systems.
Virt-manager, libvirt/virsh management tools are included.

Storage

Live migration through virtualization is not very useful if the servers don't have a common view of storage. So we included a global file system and multinode logical volume management with every copy of Advanced Platform. It allows virtual machines to migrate at will, while keeping seamless access to their storage.

Red Hat Enterprise Linux 5 includes:

Support for root device multipath IO, improving availability
Single system/guest version of Red Hat Global File System, included in the base server product
Block device data encryption support

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