Private VLANs (PVLANs) provide a powerful way to improve network segmentation and security without creating a large number of traditional VLANs. They allow traffic isolation within a single logical VLAN, which is especially useful in multi-tenant environments, DMZs, and enterprise application tiers.
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| PVLAN explained - Promiscuous, Community, Isolated |
Let's dive deeper.
VMware Cloud Foundation (VCF) 9.0 Architecture is prepared to cover the whole planet. If your business covers the whole globe you proably have datacenters at least in three regions where these regions are typically located at EMEA (Europe / EU), AMER (America / United States), APJ (Asia / Malaysia, India, etc.).
For such deployments, you have to consider network latency and the following diagram is for you.
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| VMware Cloud Foundation 9.0 Fleet Latency |
However, there is also VCF Minimal Architecture starting with just 4 ESXi hosts (servers).
In the rest of this blog post I will describe VCF terminology, VCF components and relationship between them.
VMware is excited to announce the evolution of this iconic certification into a new, broader, and more inclusive framework: the VMware Certified Distinguished Expert (VCDX). This updated program extends beyond traditional design specializations and now welcomes a wider community of top-tier professionals, including Architects, Administrators, and Support specialists. The name change reflects a larger vision: to recognize excellence across all expert roles that shape, operate, and safeguard VMware Cloud Foundation environments at scale.
Running out of disk space is one of the leading causes of IT outages. In this blog post, I will show you how to expand storage on FreeBSD with ZFS. ZFS works as volume manager and filesystem.
I recently conducted a quick analysis of a VMware vSphere–based virtual datacenter for a customer, and here’s what I found.
The average monthly electricity consumption of a single vCPU with ~3 GB vRAM is 1.4 kWh, which translates to approximately $0.4
The datacenter of my customer is located in Central Europe, and they pay 0.33 USD for 1 kWh of electricity in a Tier 3 datacenter facility (UPS + cooling included in energy cost).
Here are my questions for the broader worldwide infrastructure community.
For vSphere Cluster statistics, you can use the PowerCLI script Get-ClusterDensity. I use it to compare virtual cluster metrics (# of VMs, # of vCPUs) with the actual power consumption of physical servers, which you can obtain from your hardware’s management tools.
If you want to dive deeper into my quick analysis, read on.
Password expiration for both the VCSA root account and the vSphere administrator (typically administrator@vsphere.local) is a common issue, especially if the default 90-day expiration settings are overlooked. It recently happened to me in one lab environment. Fortunately, both passwords can be recovered. This blog post outlines the recovery methods that worked in my case.
I was observing unexpected behavior in my vSAN ESA cluster. I have a 6-node vSAN ESA cluster and a VM with a Storage Policy configured for RAID-5 (Erasure Coding). Based on the cluster size, I would expect a 4+1 stripe configuration. However, the system is using 2+1 striping, which typically applies to clusters with only 3 to 5 nodes.
RAID-5 (2+1) striping is using 133% of the raw storage
RAID-5 (4+1) striping is using 120% of the raw storage
A 13% difference is worth investigating.
