Category Archives: vSphere

VMware Snapshot Performance Impact

A number of people have asked me recently about the performance impact of having VMware snaphots on a VM. So here is my understanding of the performance impact of having snapshot(s) on a VM. The issue with having a snapshot … Continue reading

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VMware vSphere 6.5

VMware vSphere 6.5 was released earlier this week, it was announced on 18th Oct 2016 at VMworld Barcelona but was officially available for download from Tuesday this week (15th Nov 2016). Some of the new features I got to look … Continue reading

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vCenter 5.5 to 6.0 Migration

When vSphere 6 was released the vCenter Server Appliance (VCSA) was brought in line with the traditional Windows based vCenter Server. This meant that the appliance version of vCenter was the recommended version to implement. But how do you get … Continue reading

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Demise of vSphere C# Client

We have been expecting it since vSphere 4.1; VMware announced on Wed 18th May 2016 that the current version of vSphere, 6.0, will be the last version to contain the C# Client, i.e. the full desktop client we have been … Continue reading

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vCenter Server Storage Filters

vCenter has 4 Storage Filters: – RDM Filter VMFS Filter Host Rescan Filter Same Host Transports Filter These filters affect the actions vCenter takes when scanning storage as follows:- RDM Filter When you attempt to add a RDM to a … Continue reading

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vSphere Beta

There is a new vSphere Beta Program starting soon. I don’t know the exact date but I would suspect that it will be in time for the upcoming release (v6.5 maybe) to be ready for VMware at the end of … Continue reading

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Intel XEON E5-2600-v3 and vSphere 5.0

I had an interesting issue recently with HP Proliant BL460c Gen 9 blades containing Intel XEON E5-2600-v3 processors and running ESXi 5.0. All appeared to be working fine until I added the blades into an existing vSphere cluster with Gen … Continue reading

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SRM 6.1 Support for Stretched Storage Cluster

At the US VMworld at the end of August 2015 VMware Site Recovery Manager (SRM) 6.1 was announced. Once of the new features of this release is the support for stretched storage clusters. A stretched cluster is where your storage … Continue reading

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RDM Path Selection Policy (PSP) with Microsoft Clustering

Prior to vSphere 5.5 the Round Robin Path Selection Policy (VMW_PSP_RR) is not supported for the shared disks of a Microsoft cluster. You may find that the ESXi multipathing claim rules are set so that when the RDMs are discovered … Continue reading

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VMware Paravirtual SCSI Adapter (PVSCSI)

For virtual machines with high disk I/O requirements, such as Tier 1 SQL Servers, you should consider configuring the VM with the VMware Paravirtual SCSI Adapter (PVSCSI). The PVSCSI adapter was introduced in ESX/ESXi 4.0 and is virtualisation aware. It … Continue reading

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