Rolling Review: Hyper-V Aces VM Basics - InformationWeek

InformationWeek is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

IoT
IoT
Software
News
8/27/2008
07:30 PM
Randy George
Randy George
Features
Connect Directly
LinkedIn
RSS
E-Mail
50%
50%

Rolling Review: Hyper-V Aces VM Basics

But Microsoft's hypervisor lags behind VMware in rapid provisioning and disaster recovery--for now.

HIGH AVAILABILITY

High availability and VM clustering in Hyper-V worked well in the lab, but Hyper-V lacks a few fundamental features compared with ESX and the VirtualCenter/ VirtualInfrastructure suite. First, in order to cluster VMs with Microsoft Cluster Service, VMs must live on different logical unit numbers (LUNs) because it's not possible for two separate Hyper-V virtual machines to have read/write access to a file system at the same time. With VMware's VMFS, middleware exists between a VMware VM and the back-end LUN. As a result, the shim abstracts the back-end storage and allows multiple VMs and ESX servers to share a single LUN. This isn't a huge deal for small shops, but the need to provision separate LUNs for each virtual machine will be an administrative nightmare, especially for IT shops that routinely build and destroy VMs for testing, development, and quality assurance.

Microsoft told us that shared storage support for multiple VMs exists now through a third-party offering, Kayo FS from Sanbolic. Kayo FS is priced at $299 per host server and is sold in bundles of five licenses. Conversely, VMFS comes free with ESX Server, and it's included with all VMware Infrastructure versions.

DISASTER RECOVERY

THE UPSHOT
CLAIM:  Microsoft is marketing Hyper-V as an enterprise-ready, fully functional alternative to VMware and Citrix hypervisors. Hyper-V aims to address server consolidation, rapid deployment, and disaster recovery.

CONTEXT:  Hyper-V stacks up well against VMware ESX and Citrix XenServer when it comes to simple server consolidation, and it's easier to deploy. But for large-scale server virtualization chores, Hyper-V is still catching up.

CREDIBILITY:  Microsoft delivers a solid platform for core server virtualization. Its guest OS support can't compare with ESX Server's and Xen-Server's, but Microsoft-centric IT shops will find it easy to deploy and manage. And Microsoft is developing Hyper-V's enterprise capabilities at full throttle—a bad sign for rivals.

Disaster recovery is the other big deal for enterprises virtualizing in production. Hyper-V does it well, but not quite as quite as well as VMware's VMotion. In Hyper-V, when a VM must be relocated to separate physical hardware, the VM state and storage must be saved and relocated, and there's downtime associated with that process. With VMotion, state and storage are migrated in the background, and the cutover is almost instantaneous. Pricier versions of Citrix XenServer offer similar Live Migration capabilities. In the labs, we've seen VMotion cutovers happen in less than one second. With Hyper-V, the time it takes to cut over a virtual machine to new server hardware depends on the amount of memory allocated to the VM, along with the amount of storage that must be copied.

On the flip side, VMotion is only available with VMware Infrastructure Enterprise, the most expensive edition. Similarly, you'll need to buy Citrix XenServer Enterprise or Platinum edition in order to get Live Migration.

For now, Hyper-V's strengths are confined to server consolidation and basic enterprise management. But enterprise IT needs more than just a hypervisor, and VMware/ Citrix have the edge in load balancing, disaster recovery, high availability, rapid provisioning, and guest OS support.

But you can bet the VMware and Citrix advantage will be short-lived. Service Center Virtual Machine Manager 2008 promises new features like support for VMware's Virtual Machine file format through an integration with VirtualCenter. A ton of resources are being pumped into Hyper-V development, and that usually spells trouble for Microsoft's competitors.

We welcome your comments on this topic on our social media channels, or [contact us directly] with questions about the site.
Previous
2 of 2
Next
Comment  | 
Print  | 
More Insights
InformationWeek Is Getting an Upgrade!

Find out more about our plans to improve the look, functionality, and performance of the InformationWeek site in the coming months.

News
Remote Work Tops SF, NYC for Most High-Paying Job Openings
Jessica Davis, Senior Editor, Enterprise Apps,  7/20/2021
Slideshows
Blockchain Gets Real Across Industries
Lisa Morgan, Freelance Writer,  7/22/2021
Commentary
Seeking a Competitive Edge vs. Chasing Savings in the Cloud
Joao-Pierre S. Ruth, Senior Writer,  7/19/2021
White Papers
Register for InformationWeek Newsletters
2021 State of ITOps and SecOps Report
2021 State of ITOps and SecOps Report
This new report from InformationWeek explores what we've learned over the past year, critical trends around ITOps and SecOps, and where leaders are focusing their time and efforts to support a growing digital economy. Download it today!
Video
Current Issue
Monitoring Critical Cloud Workloads Report
In this report, our experts will discuss how to advance your ability to monitor critical workloads as they move about the various cloud platforms in your company.
Slideshows
Flash Poll