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VMware Hyperconverged Infrastructure is the Best Stack to Back OpenStack

See why VMware vSphere with Virtual SAN delivers the best infrastructure for OpenStack environments.

Who needs a million IOPS for a single VM?

Microsoft tried to compare storage performance results from the upcoming Windows Hyper-V 3 with experiments from a year-old vSphere whitepaper that used completely different configurations -- see what happens when similar configurations are used.

Microsoft Private Cloud: No CSV Allowed!

The new Microsoft private cloud "Virtual Machine Manager Self Server Portal 2" takes a major step backward, reverting to the "one VM per LUN" limitation when scripting LUN creation.

Register a LUN full of VMs with PowerCLI

PowerCLI makes it easy to automate vSphere tasks such as registering dormant VMs. It is also easy to create a hosts file for resolving guest IP addresses when DNS is not available.

These are not the files you are looking for

Red Hat claims that RHEV virtual disks are stored as common files. In reality, they are obfuscated beyond recognition thanks to LVM volumes.

Multiple hypervisors? What about multiple SANs?

Red Hat Enterprise Virtualization does not allow administrators to diversify storage technologies in a data center -- all hosts in a data center must choose between NFS, iSCSI, or Fibre Channel.

The Truth About VM SAN Transfers

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.

The Truth About Storage Hot Add and Remove

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.

vSphere Thin-Provisioned Disk Performance

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.

Easy recovery from a full VMware ESX datastore

With VMware vSphere, ESX, and VMFS, running out of space on a datastore does not cause damage to virtual machines. It is easy to recover without even a guest OS reboot.

PowerShell Prevents Datastore Emergencies

When a datastore in your VMware vSphere environment is about to fill up, you can have vCenter automatically spring into action to prevent downtime by using Storage VMotion.

Responsible Thin Provisioning in VMware vSphere

VMware vSphere 4 offers thin provisioned virtual disks backed by management that enables safe use in a production environment thanks to advanced accounting of all provisioned space.

VMware vSphere 4 has a Snapshot Alarm

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 […]

Finding thin-provisioned virtual disks with PowerShell

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.

Using SCVMM to attach ISO images to VMware ESX VMs

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.

Snapshots that shoot back

Although the Hyper-V Manager and SCVMM allow removing snapshots from running VMs, they are not actually merged until the VM is powered off.

IGT Part 3: One-VM-per-LUN doubters

This article is part of a series on Incoming Google Traffic (IGT). Picture this: you finally have your shiny new Hyper-V cluster configured, after asking your SAN administrator to create a LUN for you.  You create a virtual machine on that LUN and test the quick migration failover from one node to another.  It works.  […]

IGT Part 2: SAN Misers

This article is part of a series on Incoming Google Traffic (IGT). This next group of keywords are due to an unfortunate design problem with Microsoft SCVMM and Hyper-V:  ISO images are copied from the image library to individual VM directories on SAN storage before connecting. “share image file instead of copying it” mount iso […]

Storage vendors unanimously applaud SCVMM innovation

A surprising feature of SCVMM and Hyper-V is the requirement to copy multi-gigabyte ISO image files from the library server to individual VM directories on SAN storage instead of sharing a single instance.

What would things be like without VMFS?

If you have been using VMware ESX, then you might be a little spoiled by VMFS, VMware’s clustered filesystem. I have a hunch that many of us just take it for granted: create large LUNs, add to multiple ESX servers, create your virtual machines and be done with it. And, oh, migrate the VMs around […]

iSCSI configuration: VMware ESXi vs. Microsoft Hyper-V

Now that Microsoft has released the much-hyped Hyper-V Server, it’s a good time to take a look at the steps you would need to go through to configure iSCSI LUNs. As you can see in this video, it is incredibly complex.  ESXi, on the other hand, walks you through without a lot of fuss.  VMware […]