Category : VCAP

CPU Optimisation

CPU Scheduler The CPU Scheduler, as the name suggests, schedules the CPU.  It schedules the virtual CPUs on the VM (vCPUs) on the physical CPUs on the host (pCPUs). The CPU Scheduler enforces a proportional-share algorithm for CPU usage across all virtual machines and VMkernel processes on the ESXi host. It enables support for symmetric

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VMware Virtual Machine Memory Guide

Memory Virtualisation Basics When an operating system is installed directly onto the physical hardware in a non-virtualised environment, the operating system has direct access to the memory installed in the system and simple memory requests, or pages always have a 1:1 mapping to the physical RAM, meaning that if 4GB of RAM is installed, and

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VCAP-DCA – My Experience

I recently sat the VCAP-DCA exam having spent the last couple of months with my head in the books preparing for the exam. I am very pleased to announce that I passed the exam. I have been on the ‘certification road’ for about 8 years now, and during that time each exam I have taken

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Esxtop Guide

Someone once likened esxtop to windows task manager on steroids. When you have a look at the monitoring options available you can see why someone would think that. Esxtop is based on the ‘nix top system tool, used to monitor running applications, services and system processes. It is an interactive task manager that can be used

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Distributed Virtual Switch Guide

The vNetwork distributed switch is a vCenter Server managed entity.  It is designed to create a consistent switch configuration across every host in the datacentre. It allows port groups and individual port settings and statistics to migrate between ESX(i) hosts in a datacentre, the uses of private VLAN’s (PVLAN) and third party deployment. vCenter Server

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Working with ESX(i) Log Files

Working with ESX(i) log files is important when troubleshooting issues within the virtual environment. You can view and search log files in ESX(i) and in vCenter Server using a few different methods. Methods Using the vSphere client The direct console user interface (DCUI) A web browser A syslog or vMA appliance An SSH connection to

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Connecting to an iSCSI SAN with Jumbo Frames enabled

The best way to add iSCSI storage is by utilizing dedicating NIC’s to iSCSI traffic, on dedicated VMkernel switches, with separate IP subnet address ranges and separate physical switches or VLAN’s. Enable Jumbo Frames on a vSwitch To enable Jumbo Frames on a vSwitch, change the MTU configuration for that vSwitch.  It is best to start with a new

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