Red Hat Enterprise Linux 6.5 released..

Red Hat Enterprise linux 6.5 released recently. I am excited to see the improvements came in virtualization space ( glusterfs support, cpu hotplugging, pvpanic, ovf conversion..etc) in this specific release..

Below are some details about this list of features..

Improved Support For the VMDK Image File Format

Red Hat Enterprise Linux 6.5 includes a number of improvements to read-only support for Virtual Machine Disk, or VMDK, image file formats, including its subformats, as created by many VMware products.

Windows Guest Agent Fully Supported

The Windows guest agent is now fully supported and delivered with its own installer in the Supplementary channel together with virtio-win drivers.

Support for the VHDX Image File Format

Red Hat Enterprise Linux 6.5 includes read-only support for Hyper-V virtual hard disk, or VHDX, image formats, as created by Microsoft Hyper-V.

Native Support for GlusterFS in QEMU

Native Support for GlusterFS in QEMU allows native access to GlusterFS volumes using the libgfapi library instead of through a locally mounted FUSE file system. This native approach offers considerable performance improvements.

Support for Dumping Metadata of Virtual Disks
This low-level feature uses the newly introduced command option qemu-img map to create an index that allows a qcow2 image to be mapped to a block device via LVM. As a result, virtual machine images (with the virtual machine shutdown) can be accessed as block devices. This is useful for backup applications that are now able to read guest image contents without knowing the details of the qcow2 image format.

CPU Hot Plugging for Linux Guests

CPU hot plugging and hot unplugging are supported with the help of the QEMU guest agent on Linux guests; CPUs can be enabled or disabled while the guest is running, thus mimicking the hot plug or hot unplug feature.

Application-Aware freeze and thaw on Microsoft Windows with VSS Support on qemu-ga-win

VSS (Volume Shadow Copy Service) is a Microsoft Windows API that allows, among other things, the notification of applications for proper, consistent freeze and thaw operations. With this feature, snapshots taken while the virtual machine is running are consistent through the whole stack (from the block layer to the guest applications) and can be used for backup purposes. For more information, see the Virtualization Administration Guide

Application-Aware freeze and thaw on Linux Using qemu-ga Hooks
Similar to the Windows VSS version, application-consistent snapshots can be created with the use of scripts that attach to the QEMU guest agent running on the guest. These scripts can notify applications which would flush their data to the disk during a freeze or thaw operation, thus allowing consistent snapshots to be taken.

Conversion of VMware OVF and Citrix Xen Guests to KVM Guests
The virt-v2v conversion tool has been upgraded to an upstream version to support conversion of VMware Open Virtualization Format (OVF) and Citrix Xen guest conversion to KVM.

Increased KVM Memory Scalability
KVM virtual memory scalability in a single guest has been increased to 4TB.

Support of Volume Control from within Microsoft Windows Guests

Users can now fully control the volume level on Microsoft Windows XP guests using the AC’97 codec.

Opening Connections from a File
It is now possible to set up a remote-viewer session from a configuration file associated with a registered MIME type, for example, from the Red Hat Enterprise Virtualization Manager portal. A simple browser link can be used without the need for a browser-specific plug-in or multi-process communication.
Host and Guest Panic Notification in KVM

A new pvpanic virtual device can be wired into the virtualization stack such that a guest panic can cause libvirt to send a notification event to management applications. This feature is introduced in Red Hat Enterprise Linux 6.5 as a Technology Preview. Note that enabling the use of this device requires the use of additional qemu command line options; this release does not include any supported way for libvirt to set those options.



Really nice features have been got into this release.. Please test the same and report your feedback!

Red Hat summit 2013 && RHEV 3.2 release..


Red Hat launched next stable version of RHEV (3.2 ) in Red Hat Summit 2013 event and here is more details about it.


“RALEIGH, N.C. and BOSTON – RED HAT SUMMIT 2013 – June 12, 2013 – Red Hat, Inc. (NYSE: RHT), the world’s leading provider of open source solutions, today announced the global availability of Red Hat Enterprise Virtualization 3.2, with fully supported Storage Live Migration and a new third-party plug-in framework. As part of Red Hat’s open hybrid cloud offerings, Red Hat Enterprise Virtualization is the industry’s only mission-critical end-to-end, open source virtualization infrastructure designed for enterprise users and global organizations. …

References on summit :



Summit on FB :

RHEV 3.1 is out with coooool features!!!!

Friends , I am happy to share this with u.. RHEV 3.1 is out with lots of good features !!!!!

  • Improved scalability supporting virtual machines with up to 160 virtual CPUs and 2TB RAM
  • Quotas, extending the existing self-service capabilities of Red Hat Enterprise Virtualization 3.0 to allow administrators to define resource quotas for individual users and groups
  • Browser independent Web Admin portal, now supporting French, German, Japanese, Simplified Chinese and Spanish
  • Storage Live Migration, allowing administrators to reduce down time and improve storage efficiency and utilization by dynamically moving virtual machine disk images between storage arrays without requiring any down time
  • New P2V tools and capabilities, allowing customers to quickly migrate physical machines to virtual machines running on Red Hat Enterprise Virtualization
  • New virtual machine storage features including hotplug support and direct LUN access
  • Support for new x86 chipsets, including AMD’s Bulldozer family of CPUs and Intel SandyBridge
  • Support for storing virtual machine images on Red Hat Storage, a software-only solution for scale-out NAS for datacenter and cloud environments
  • Scriptability enhancements, including a new Linux CLI and Python SDK in addition to REST Platform updates to JBoss Enterprise Application Platform 6, OpenJDK 7 and JasperReports 4.7
  • Support for Red Hat Directory Server and IBM Tivoli Directory Server, in addition to Red Hat Identity Management and Microsoft Active Directory
  • New POSIX filesystem support extending Red Hat Enterprise Virtualization’s existing support for Fiber Channel, iSCSI, NFS and local storage to add support for any cluster-aware POSIX filesystem for including Red Hat Storage and IBM GPFS
  • And much more!