SRM Product Survey

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Hi all, we're doing another survey of our SRM customers to try to understand your usage and inform our product management decisions with some hard data.  If you get a chance to do the survey we'd appreciate it – shouldn't take more than 15 minutes of your time. Thanks! SRM Product Survey Read more...

Admission control: "used slots" exceeds "total slots"

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By Duncan Epping, Principal Architect. On the VMTN forum today someone asked how it was possible that the “used slots” exceeded the “total slots”. This is what their environment showed in vCenter: HA Advanced Runtime Info:Slot size                          4000Mhz                                   4 vCPUs,                                   4232MBTotal Slots in Cluster             16Used Slots                         66Available Slots                    0Total Powered on vms in Cluster    66Total Read more...

VAAI Offload Failures & the role of the VMKernel Data Mover

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Before VMware introduced VAAI (vSphere Storage APIs for Array Integration), migrations of Virtual Machines (and their associated disks) between datastores was done by the VMkernel Data Mover (DM). The Data Mover aims to have a continuous queue of outstanding IO requests to achieve maximum throughput. Incoming I/O requests to the Data Mover are divided up Read more...

Enabling Password Free SSH Access on ESXi 5.0

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Posted on 25 July, 2012 by Kyle Gleed, Sr. Technical Marketing Architect, VMware I came across this question today:  “How do I setup password free SSH access to my ESXi hosts”.   A quick Google search turned up a lot of good info on this topic, but I didn’t find anything on the vSphere blog so Read more...

vSphere HA isolation response… which to use when?

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By Duncan Epping, Principal Architect. A while back I wrote this article about a split brain scenario with vSphere HA. Although we have multiple techniques to mitigate these scenarios it is always better to prevent. I had already blogged about this before but I figured it wouldn’t hurt to get this out again and elaborate Read more...

Path failure and related SATP/PSP behaviour

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Posted by Cormac HoganTechnical Marketing Architect (Storage) This question came up in a recent conversation about what happens in the Pluggable Storage Architecture (PSA) when there is a path failure. It basically describes the roles played by both the Storage Array Type Plugin (SATP) and the Path Selection Policy (PSP) when a path fails, resulting Read more...

Automatically Securing Virtual Machines Using a vCenter Alarm

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In a previous blog post, we demonstrated how you can easily automate the hardening of your Virtual Machines by using a PowerCLI or vSphere SDK for Perl script and apply the latest vSphere 5.0 Security Hardening Guide recommendations for your Virtual Machines. Now, this is great for securing your existing Virtual Machines, but what about Read more...

Clarification on The Auto Start Issues in vSphere 5.0 Update 1

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Posted by Kyle Gleed, Sr. Technical Marketing Architect, VMware on 18 July 2012 VMware recently released a patch on July 12th that, among other things, fixes a virtual machine auto start bug that was introduced with 5.0 Update1 (5.0U1).  This bug affects customers running the free version of ESXi and has received a lot of Read more...