Category: VMware

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VAAI hw offload and Storage vMotion between two Storage Arrays

Recently I received a question about migrating virtual machines with Storage vMotion between two Storage Arrays. More specifically if VAAI is leveraged by Storage vMotion in this process. Unfortunately VAAI is an internal array based

vSphere 5.1 Storage DRS Multi-VM provisioning improvement

When a virtual machine is provisioned to the datastore cluster, Storage DRS algorithm runs to determine the best placement of the virtual machine. The interesting part of this process is the method Storage DRS determines

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Add DRS cluster to existing Storage DRS Datastore Cluster?

Lately I have seen the following question popping up at multiple places: “How can I add hosts of a DRS cluster to a Storage DRS datastore cluster after the datastore cluster is created?”This is an

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vMotion bug fixed in vCenter server 5.1.0a

Looking for the “Designing your vMotion network“? Please follow the link.Last week VMware vCenter Server™ 5.1.0a was released which contains a bugfix for Essential plus license customers. A few readers provided me feedback about being

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vSphere 5.1 Storage DRS load balancing and SIOC threshold enhancements

Lately I have been receiving questions on best practices and considerations for aligning the Storage DRS latency and Storage IO Control (SIOC) latency, how they are correlated and how to configure them to work optimally

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Storage DRS and alternative swap file locations

By default a virtual machine swap file is stored in the working directory of the virtual machine. However, it is possible to configure the hosts in the DRS cluster to place the virtual machine swapfiles

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Want to have a vSphere 5.1 clustering deepdive book for free?

Want to have a vSphere 5.1 clustering deepdive book for free? CloudPhysics are giving away some vSphere 5.1 clustering deepdive books, do the following if you want to receive a copy:Action required Email info@cloudphysics.com with

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HA admission control is not a capacity management tool.

I receive a lot of questions on why HA doesn’t work when virtual machines are not configured with VM-level reservations. If no VM-level reservations are used, the cluster will indicate a fail over capacity of

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Partially connected datastore clusters – where can I find the warnings and how to solve it via the web client?

During my Storage DRS presentation at VMworld I talked about datastore cluster architecture and covered the impact of partially connected datastore clusters. In short – when a datastore in a datastore cluster is not connected

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vSphere 5.1 DRS advanced option LimitVMsPerESXHost

During the Resource Management Group Discussion here in VMworld Barcelona a customer asked me about limiting the number of VMs per Host. vSphere 5.1 contains an advanced option on DRS clusters to do this. If

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From the archives – An old Isometric diagram

While searching for a diagram I stumbled upon an old diagram I made in 2007. I think this diagram started my whole obsession with diagrams and to add “cleanness” to my diagrams.This diagram depicts a

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Cloudphysics VM Reservation & Limits card – a closer look

The VM Reservation and Limits card was released yesterday. CloudPhysics decided to create this card based on the popularity of this topic in the contest. So what does this card do? Let’s have a closer

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