ProductsDesktop Server For Scientific Computing For IBM POWER For IBM System z For SAP Business Applications Red Hat Network Satellite ManagementExtended Update Support High Availability High Performance Network Load Balancer Resilient Storage Scalable File System Smart Management Extended Lifecycle SupportDeveloper Studio Portfolio Edition Web Framework Kit Application Platform Web Server Data Grid Portal Platform Red Hat JBoss A-MQ Red Hat JBoss Fuse SOA Platform Business Rules Management System (BRMS) Data Services Platform Messaging JBoss Operations Network JBoss Community or JBoss enterprise
SolutionsApplication development Business process management Enterprise application integration Interoperability Operational efficiency Security VirtualizationSolaris to Red Hat Enterprise Linux Migration overview Migrate from your UNIX platform How to migrate to Red Hat Enterprise Linux Upgrade to the latest Red Hat Enterprise Linux release JBoss Enterprise Middleware Benefits of migrating to Red Hat Enterprise Linux Migration services Start a conversation with Red Hat
TrainingPopular and new courses Red Hat JBoss Administration curriculum Core System Administration curriculum JBoss Middleware Development curriculum Advanced System Administration curriculum Linux Development curriculum Cloud Computing, Virtualization, and Storage curriculum
ConsultingBusiness Process Management Cloud and Virtualization Custom Software Development Enterprise Data and Storage Systems Management Migrations
Fedora 12 Spotlight Feature: Virtualization Enhancements
November 17, 2009
by Fedora Team
In previous Fedora 12 spotlight blogs we’ve highlighted SystemTap and desktop enhancements. Fedora 12 also includes a number of virtualization improvements, from better virtual disk performance and storage discovery to hot changes for virtual network interfaces, reduced memory consumption and a modern network booting infrastructure. For a more in-depth look, read the collection of interviews here with members of the Fedora community who have worked directly on the many virtualization improvements in Fedora 12.
Libguestfs and guestfish make their debut in Fedora 12 and continue Fedora’s long-standing leadership in making it easier for system administrators to manage virtual machines. Libguestfs is a library for accessing and modifying the disk images of virtual machines. In combination with guestfish, the libguestfs interactive shell replaces the old and cumbersome methods of accessing guest disk images creating loopback mounts as root, using kpartx, and reconfiguring LVM. The libguestfs feature lets administrators work directly with virtual guest machine disk images without any of these steps, and without booting those guests.
New higher-performance virtualization capabilities help administrators build more secure, powerful, scalable and easy to manage solutions. In Fedora 12, administrators can now choose to use huge page backed memory to reduce memory consumption and improve performance by reducing CPU cache pressure, retain VM hardware profiles across qemu upgrades, add network interfaces to a KVM guest without restarting, and enable VM hosts to discover new SAN storage and issue NPIV operations.
Several changes have been introduced to QEMU/KVM virtual machines in an effort to improve host security in the event of a flaw in the QEMU binary, and the deprecated etherboot PXE booting infrastructure has been replaced by gPXE. Fedora 12 also features improvements in the I/O performance of virtual machines using the qcow2 disk format, as well as improved tools for interface configuration.
Check out the video below, where Fedora Project Leader Paul Frields talks about a few of the Fedora 12 virtualization features with Red Hat’s Chris Wright, principal software engineer, and Hugh Brock, manager, Software Engineering.