Working together with Intel and Dell, VMware demonstrated vMotion with SR-IOV on ESX in 2009.
You are currently browsing articles tagged ESX.
A recent article on a popular technology media outlet includes misinformed claims about Hyper-V Dynamic Memory advantages over VMware vSphere.
Network teaming provides load balancing and fault tolerance to your virtual infrastructure. VMware vSphere provides powerful, elegant solutions to meet the most demanding requirements. The Hyper-V platform continues to rely on unsupported legacy technologies.
While VMware ESX exposes the latest performance-enhancing CPU instructions to virtual machines, Red Hat Enterprise Virtualization (RHEV) takes a more conservative approach -- downgrading all CPUs to masquerade as an old Pentium II.
Satirical open letter to Red Hat from VMware ESX.
The majority of Windows crashes are caused by third-party device drivers. See how Hyper-V reliability is compromised due to its dependence on a general-purpose OS.
Yo Dawg! I heard you like to virtualize, but there is no truth to the rumor that Xzibit influenced the Hyper-V design.
VMware ESX 4 can virtualize itself, and by using a special undocumented configuration setting it is now possible to take snapshots of virtual VMware ESX 4 systems.
Microsoft has broken through numerous technological barriers, enabling Windows/Hyper-V to directly execute Linux applications.
Microsoft Virtualization publishes an embarrassing guest post refuting vSphere advantages, doing more harm than good.
Learn about Microsoft's attempt to implement memory overcommit in Hyper-V.
HP Blades incorporate an SD slot that can be used to easily deploy VMware ESXi from flash. Take a look.
While Microsoft marketing material claims Hyper-V and SCVMM can transfer large virtual machine files and templates over a SAN, the truth is that all VM transfers are done over the network. Only VMware ESX leverages high-speed storage area networking for VM migration.
VMware vSphere 4 offers multiple options for expanding virtual machine storage with zero downtime, including the ability to grow a running virtual disk. Hyper-V marketing literature makes a similar claim, but is limited to simply adding another virtual disk.
A new paper published by the VMware Performance Team shows that virtual disks using vStorage Thin Provisioning perform nearly as well as fully allocated thick disks.
Microsoft stretches the truth when claiming that VMware adds an additional layer to your architecture. The fact is, Hyper-V relies on its own instance of Windows and requires more instances for running apps.
When an administrator is connected to an VMware ESX virtual machine remote console and that VM is migrated with VMotion to another host, the connection seamlessly migrates to the destination host. Hyper-V does not offer this capability.
This article is part of a series on Incoming Google Traffic (IGT). It is very clear that the VMware community loves the ability to run virtual instances of VMware ESX 4 — this has been the most popular VCritical article ever. Take a look at these keywords that account for hundreds of searches over the […]
While completely unsupported, it is possible to build a small 64MB flash drive that will boot and run VMware ESXi 4.
Although VMware ESXi 4 requires a 1GB flash device to install, the core hypervisor functionality is fully contained in less than 60MB. Most of the remaining space is for a downloadable vSphere Client or simply unused.
If your server OEM supports it, you might be able to get the free Hyper-V Server R2 to boot from a flash drive someday. VMware ESXi supports this feature today.
VMware ESXi runs great from a USB flash drive and it is easy to prepare a batch of drives for your servers without leaving the comfort of your desk -- by creating them with VMware Workstation.
If you have used VMware VI3 and vSphere 4, one thing you probably noticed right away is the difference in licensing. To much applause, vSphere no longer uses a FLEXlm license server. While you transition from VI3 to vSphere you will still need to keep the license server around, though. Fortunately vCenter Server 4 is […]
Snapshots have always been a powerful feature of VMware ESX — even in production deployments. There are tons of innovative tools and scripts out there to monitor snapshots — just check out this new one from Virtu-Al. If you happen to want a simple, built-in way to monitor your snapshots in VMware vSphere 4, look […]
VMware ESX 4 allows users to select DHCP to automatically obtain an IP address for VMkernel ports -- used for VMotion, iSCSI, and NFS storage.
The number of virtual CPUs in a VM on ESX 4 is not limited to power-of-two values--any integer value from 1-8 is permitted.
Fear, Uncertainty, Doubt — FUD. The expression may have started with the mainframe generation, but these days most technology pros associate the term with Microsoft tactics. That’s why I find it more than a little humorous to see the Microsoft Virtualization Team using it on their blog right now in an attempt to defend Hyper-V’s […]
In yesterday’s post I showed how VMware ESX 4 can be run as a guest OS inside a virtual machine on ESX 4. As a follow-up, here is an interesting feat that can be performed with such a configuration: migrate a running VM with VMotion from the physical ESX host to the virtual ESX host. […]
VMware ESX 4 can run multiple virtual instances of ESX 4 on a single physical server and even allows powering on and VMotion of nested VMs inside virtual ESX (vESX). Perfect for a small VMware vSphere test lab!
Hyper-V is often downloaded to Windows Server systems that will never be used to run virtual machines. Making this an irrelevant metric for Hyper-V installed base figures.
I need to quickly download an ISO image to my new VMware ESX 4 box and discovered that the cURL utility is now included — pretty handy. If you have not used cURL, it is similar to wget. However, with no parameters cURL will spew the download to standard out — definitely not what you […]
The SVVP identifies VMware ESX releases that are supported by Microsoft. Customers are sometimes turned away unnecessarily due to lack of awareness.
Recently, Microsoft published a questionable video dispelling numerous VMware myths. The only problem, at least for Microsoft, is that they really didn’t do a very convincing job. In fact, the video is so sorry that I don’t mind promoting it here on VCritical — check it out! Mythbusters Busted Gabe’s Virtual World has an excellent […]
Question When is it okay to disregard the EULA clause on publishing hypervisor performance benchmarks? Answer Never.
Yesterday I wrote a summary of the hazards of using SCVMM to manage VI3 — highlighting previously published VCritical articles as well as linking to a new series of videos on Why Choose VMware. Looks like VMware may have hit a nerve, as the Microsoft virtualization team scrambled to issue a barrage of rebuttals. My […]
Features found in VMware ESX are unnecessarily neutered when attempting to manage by using System Center Virtual Machine Manager 2008.
Hyper-V Linux guests (SUSE) do not yet have integration components or customization capabilities. Nor can you P2V a Linux system to Hyper-V.
Encapsulation is one of the four key benefits of VMware virtual machines. On the surface it may seem like this is a common feature across all virtualization platforms — but it’s not. If you are a VMware ESX administrator, you know that a VMware virtual machine consists of several files, normally contained in a single […]
Unlike Hyper-V, VMware ESX ships with complete network interface (NIC) teaming capabilities, a critical feature for hypervisors.
VMware recently announced the new VMware ESXi Management Kit. If you have up to three free ESXi servers deployed and would like to manage them with vCenter Server, this is a great opportunity. Available until April 30 for $995. The kit includes: VMware vCenter Server Foundation vCenter Agents for 3 ESXi hosts (2 CPU sockets […]
Even though the VI Client does not offer creation of VMs with thin-provisioned disks, they may exist. Use a PowerShell script to identify them.
By design, System Center Virtual Machine Manager copies ISO CD/DVD images to managed hosts instead of sharing. For VMware ESX it uses SFTP. For ESXi, it fails.
I came across this forum post today where a person is trying to evaluate SCVMM and Virtual Server — all running inside an ESX VM. Apparently, the performance is bad… Doh! At least someone responded with this helpful analogy: It’s like buying a walk-in refrigerator and then putting a smaller one inside of it.
Users that wish to implement Hyper-V CPU reservations and limits are forced to open another tool, Hyper-V Manager, instead of configure these with SCVMM.
Virtual machine snapshots are a quick way to recover from unexpected incompatibilities you may encounter when patching guest operating systems. In fact, VMware Update Manager even provides an option to automatically snapshot a VM before applying updates and then delete the snapshot after a specified amount of time. Even if you are not using VMware […]
Although the Hyper-V Manager and SCVMM allow removing snapshots from running VMs, they are not actually merged until the VM is powered off.
VMware ESX virtual machine networking is pretty straightforward. A virtual switch (vSwitch) is created on each host by default and is associated with one or more physical NICs. When multiple physical NICs are used, virtual machines benefit from added redundancy and load balancing by simply connecting to such a vSwitch. However, VMs don’t connect directly […]
Yesterday Chad Sakac wrote a nice article on Storage VMotion that you might want to check out. I think the Q&A format makes it easy to read. It is an amazing thing to see an entire running VM move from one storage array to another. Hmm, makes you wonder what the smart guys in VMware […]
When managing a virtual environment, there are two layers of patching that need to be considered. Guest operating systems and applications inside the virtual machines need regular updates — patch Tuesday for Windows. And the hypervisor platforms themselves, like any other software, also need to be patched. What happens to the virtual machines when the […]
Duncan at Yellow Bricks has a handy post on cleaning up your VI Client cached server address list. There is a related issue with cached self-signed SSL certificate thumbprints. When you first connect to a VirtualCenter Server or ESX host, you see a dialog box: