Category VMware

Performance, Security, VMware

vSphere CPU Scheduler

In vSphere 6.7 VMware introduced CPU Scheduler options that allows the Administrators to secure against CPU exploits by defining how the VM access the CPU. These CPU Schedulers have different impact on performance. This article shows why and how they work.

VMInfrastructure
August 31, 2022

VMware

Output of ESXtop results unreadable

Terminal on Mac uses by default xTerm-256color – this is not supported by ESXi and will result in garbled display when you run commands like ESXtop. To get an output that is readable we need to change the terminal display…

VMInfrastructure
August 9, 2022

Performance, vSphere

VMware Performance – CPU READY

A deep dive into CPU Ready time and the effects of it on VM running on VMware vSphere. The article explains the symptoms, what CPU ready is and what it is not and how to resolve it.

vSphere

Distributed Resource Scheduler

DRS addresses where it is optimal for a VM to run. This is done to place the VM on the best ESXi host when the VM starts up based upon resources availability. The load balancing between Cluster nodes (ESXi hosts) is also based on moving VMs to another host that has less resource constraints.

VMInfrastructure
June 30, 2022

VMware, vSphere

vSphere FT

VMware HA and FT are often misunderstood. Here I will take a deep dive look at what FT provides, read this article for HA deep dive. What is vSphere FT vSphere Fault Tolerance (FT) is for most mission critical virtual…

VMInfrastructure
June 29, 2022

vSphere

Defining VM start order in case of VMware vSphere HA Event

Within vSphere 6.7 and later we can define the start order of VMs in a vSphere cluster in case of an HA event. This can be very useful for certain applications, like if the database server needs to be up…

VMInfrastructure
June 22, 2022