11-1 Resource Shares Dynamic resource management –Only used if there is resource contention –Prevents a single VM from utilizing all the resources –Prioritizes.

11-1

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%

1000 Shares – 25%

1000 Shares – 25%

1000 Shares – 25%

Number of Shares Equal

(each has 25%)

2000 Shares – 22%

1000 Shares – 11%

2000 Shares – 22%

4000 Shares – 45%

Changing Share Values(% varies on # of shares)

Topic 1: Configuring Resource Pools

Starting a VM changes resource allocation

2000 Shares – 20%

1000 Shares – 10%

2000 Shares – 20%

4000 Shares – 40%

1000 Shares – 10%

Turning off VM changes resource allocation

2000 Shares – 22%

1000 Shares – 11%

2000 Shares – 22%

4000 Shares – 45%

1000 SharesTurned off

11-2

Expandable Reservations

Topic 1: Configuring Resource Pools

• 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?

2

11-311-3

How VMotion Works• Users currently accessing

VM1-1 on ESX1• Initiate migration of VM1-1 from ESX1 to

ESX2 while VM1-1 is up and running ESX Server 1

Shared Storage

Virtual Disk and Config files

ESX Server 2

VM1-1

Corp

Net

Net

wor

kVM

Moti

on N

etw

ork

ESX Server 1

Step One:

Step Two:• Pre-copy memory from ESX1 to ESX2

• Log ongoing memory changes into a memory bitmap on ESX1

• Quiesce virtual machine on ESX1

• Copy memory bitmap to ESX2

Step Three:

Step Four:• Start VM1-1 on ESX2

• Users now access VM1-1 on ESX2

Step Six:

• Delete VM1-1 from ESX1 after migration is successful

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

11

VM1-14

MemoryBitmap

2

Mem

ory

2

Mem

ory

Bitm

ap3

4

5

6 Fetc

h Pa

ges/

Copy

Pag

es5

Topic 2: Configuring VMotion

5

11-411-4

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

Topic 6: Update Manager

2

11-511-5

Remediation

Topic 6: Update Manager

• ESX Hosts use the Hosts and Clusters View• VMs use the Virtual Machines and Templates View

4

11-611-6

Chapter 11 Review Questions

1. Which technology moves running virtual machines from one VMware ESX 3.5 host to another?

A. HA C. Cold MigrationB. VMotion D. Update Manager

2. In VMware ESX 3.5, what defines the guaranteed minimum RAM for a virtual machine?

A. Expandable Reservation C. LimitB. 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 AggressiveB. Aggressive E. MidpointC. Most Conservative

11-711-7

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.

True False