Summary: Vmware Vsphere Volume 1 Esxi 5.5

Read the summary and the most important questions on VMware vSphere Volume 1 ESXi 5.5

• 2 Software-Defined Data Center

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• Reasons to use Virtual machine

  Easy to relocate:
  - Encapsulated into files
  - Independent of physical hardware
  Easy to manage:
  - Isolated from other VM
  - Insulated from hardware changes
  Provides the ability to support legacy applications
  Allows servers to be consolidated

• A guest operating system failure has no effect on the following: 

  •The ability of users to access the other virtual machines
  •The ability of the operational virtual machines to access the resources that they must have
  •The performance of the other virtual machines

• VMFS File System

  - VMFS datastore employs a file structure similar to a Linux OS
  - Each datastore is mounted to folder and contains several subdirectories containing files that describe a virtual machine
  - VMFS has been optimized to support large files and to perform many small concurrent writes

• About Private Clouds Advantages

  
  - Self-service provisioning
  - Elasticity of resources
  - Rapid and simplified provisioning
  - Secured multitenancy  
  - Improved use of IT resources
  - Better control of IT budgets

• About Public Clouds Advantages

  
  - Public clouds have all of the advantages of a private cloud:
  •    Customer management of IT
  •    Rapid and flexible deployments
  •    Efficient and cost-effective deployments
  •    Secure IT assets
  - cloud service provider
      Customer companies no longer have IT as an ongoing overhead expense.

• VMware vCloud® Hybrid Service

  
  VMware offers VMware vCloud® Hybrid ServiceTM to aid in constructing and managing hybrid clouds.

• vSphere Client: Configuration Tab

  
  On the Configuration tab, you can view the host’s processor and memory configuration and configure a host’s networking and storage. You can also complete these tasks:
  
  - Add a host’s license key
  - Configure the host as a Network Time Protocol (NTP) client
  - Configure or modify the primary and secondary DNS servers
  - Modify the ESXi host’s security profile

• Viewing Processor and Memory Configuration

   Information about your host’s CPU's
  - CPU Model
  - Speed
  - Nummer os sockets
  - cores
  - Logical processors
  
  Information about physical Memory :
  - Total size
  - The amount used for system overhead
  - The amount used for VM's

• Viewing ESXi System Logs

  
  - hostd.log 
  - vmkernel.log
  - VC agent log : vpxa.log

• The evaluation period ESXi

  - 60 days from the time that you install ESXi
  - The 60-day evaluation period cannot be paused and it cannot be restarted.
  - After the evaluation period expires, you can no longer perform some operations in vCenter Server and ESXi."
  - you cannot power on or reset your virtual machines. In addition, all hosts are disconnected from the vCenter Server system. 
  - Evaluation mode is intended for demonstrating the software or evaluating its features. During the evaluation period, the software is operational.