Recent Posts

vSphere future: storage reservation survey

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The resource management team is interested in your opinion about a feature in development; storage reservations. The current version of Storage I/O Control provides tools to prioritize and provide fairness to I/O streams of virtual machines. However the current version does not provide a function to specify number of IOPS to guarantee a minimum level. Read more...

Storage vMotion between NFS and VMFS datastores

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Today the question was asked if VMware supports migrating a virtual machine with Storage vMotion between NFS and VMFS datastores. Needing to convince someone that live storage vMotion between SAN->NAS is supported. Can only find marketing piece, anyone have a tech doc? — Matt Vogt (@mattvogt) February 6, 2013 It appears no documentation is explicitly Read more...

Storage DRS survey

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If you have a few spare minutes, please fill out the survey about Storage DRS usage. We are very interested in your Storage DRS architecture and which options you use. But we are also seeking to identify adoption blockers preventing you to use Storage DRS. It takes about 5 minutes to get through. Storage DRS Read more...

Technical paper: “VMware vCloud Director Resource Allocation Models” available for download

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Today the technical paper “VMware vCloud Director Resource Allocation Models” has been made available for download on VMware.com. This whitepaper covers the allocation models used by vCloud Director 1.5 and how they interact with the vSphere layer. This paper helps you correlate the vCloud allocation model settings with the vSphere resource allocation settings. It provides Read more...

Virtualized vCenter in a Datastore Cluster

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By Frank Denneman – Senior Technical Marketing Architect To virtualize vCenter or not, that has been an age-old question. To control the location of the vCenter virtual machine, in case the hosting vSphere server crashes, a couple of best practices where developed. Such as; Disable DRS, create host-vm affinity groups or my favorite, leave all Read more...

VMware vSphere Storage DRS Interoperability technical paper available

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Today the technical paper VMware vSphere Storage DRS Interoperability is made available for download at the Technical Resource Center at VMware.com. This white paper presents an overview of best practices for customers considering the implementation of VMware vSphere Storage DRS in combination with advanced storage device features or other VMware products. This document zooms in Read more...

Mem.MinFreePct sliding scale function

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One of the cool “under the hood” improvements vSphere 5 offers is the sliding scale function of the Mem.MinFreePct. Before diving into the sliding scale function, let’s take a look at the Mem.MinFreePct function itself. MinFreePct determines the amount of memory the VMkernel should keep free. This threshold is subdivided in various memory thresholds, i.e. Read more...