Resource Shares Dynamic resource management Only used if there is resource contention Prevents a single VM from utilizing all the resources Prioritizes specific VM resource usage during contention 1000 Shares – 25% Number of Shares Equal (each has 25%) 2000 Shares – 22% 1000 Shares – 11% 4000 Shares – 45% Changing Share Values (% varies on # of shares) 11-8 Starting a VM changes resource allocation 2000 Shares – 20% 1000 Shares – 10% 4000 Shares – 40% Turning off VM changes resource allocation 2000 Shares – 22% 1000 Shares – 11% 4000 Shares – 45% 1000 Shares Turned off 1 Topic 1: Configuring Resource Pools

Expandable Reservations Allow use of available parent resources when a Resource Pool’s Reservation for a resource has been reached Maximum of up to 12 levels of resource pools allowed Events that trigger Expandable Reservation use: Power on VM Create child resource pool Change resource pool reservation What is necessary to start VM2-1 below? 11-10 2 Topic 1: Configuring Resource Pools

Virtual Disk and Config files How VMotion Works 1 Step One: 1 VM1-1 Users currently accessing VM1-1 on ESX1 Initiate migration of VM1-1 from ESX1 to ESX2 while VM1-1 is up and running 4 ESX Server 1 ESX Server 1 5 Step Two: Pre-copy memory from ESX1 to ESX2 Log ongoing memory changes into a memory bitmap on ESX1 2 3 11-18 Shared Storage Virtual Disk and Config files 2 Memory Quiesce virtual machine on ESX1 Copy memory bitmap to ESX2 Step Three: VM Motion Network CorpNet Network Memory Bitmap Memory Bitmap Fetch Pages/Copy Pages 5 Step Four: Start VM1-1 on ESX2 Users now access VM1-1 on ESX2 6 Step Five: Copy VM’s remaining memory (as listed in memory bitmap) from ESX1 Fetch pages from source VM when applications attempt to read/write modified memory in VM1-1 on ESX2 ESX Server 2 4 Step Six: Delete VM1-1 from ESX1 after migration is successful VM1-1 5 Topic 2: Configuring VMotion

Update Manager Downloads Schedule the download of patches Repository Location Set during Install C:\Documents and Settings\All Users\Application Data\VMware\VMware Update Manager\Data (Default) Configured After Install Modify <patchStore> tag in C:\Program Files\VMware\Infrastructure\Update Manager\vci-integrity.xml file 11-73 2 Topic 6: Update Manager

Remediation ESX Hosts use the Hosts and Clusters View VMs use the Virtual Machines and Templates View 11-74 4 Topic 6: Update Manager

Chapter 11 Review Questions 1. Which technology moves running virtual machines from one VMware ESX 3.5 host to another? A. HA C. Cold Migration B. VMotion D. Update Manager 2. In VMware ESX 3.5, what defines the guaranteed minimum RAM for a virtual machine? A. Expandable Reservation C. Limit B. Reservation D. Shares 3. In VMware vCenter 2.5, which of the following Fully Automated settings for DRS will provide the least amount of effort on the part of the vCenter Administrator? A. Moderately Conservative D. Moderately Aggressive B. Aggressive E. Midpoint C. Most Conservative

Chapter 11 Review Questions 4. The only VMware supported method of using Storage VMotion is from the Remote Command Line Interface (RCLI). True False 5. Storage VMotion in VMware ESX 3.5 requires that the virtual machine is powered off.