Tag Archives: storage

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. Continue reading

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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. Continue reading

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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. Continue reading

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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. Continue reading

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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. Continue reading

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