Module 11: Scalability Lesson 4: vMotion Migration Flashcards
(13 cards)
What does vMotion do?
Migrates running VMs from one server to another with no disruption or downtime
How does vMotion work?
The entire state of the virtual machine is moved from one host to another, while the data storage remains in the same datastore
What kind of information is stored in the state of the VM?
BIOS, Devices, CPU. MAC address for the Ethernet cards
What requirements need to be met for a vMotion migration to be successful?
SAN visibility, GbE interconnection, consistent network configuration, source and destination CPUs from the same compatibility group
What is the maximum number of concurrent vMotion migrations that are supported per VMFS datastore?
128
How many concurrent vMotion migrations are supported over a 1Gbps network?
4
How many concurrent vMotion migration are supported over a 10Gbps network?
8
In regards to vMotion what must match on both the source and destination hosts?
Manufacturer and Family of CPU (Intel, AMD) and (P4, Operton)
Presence or absence of SSE3, SSSE3 or SSE4.1
64-bit VMs on Intel
Execution-disable (NX/DX)
What is SSE4.1?
Instructions that are application-level instructions that bypass the virtualization layer and might cause instability
What is AMD NX?
No execute
What is Intel XD?
execute disable
Where can NX/DX be configured in Client?
right-click powered off machine > edit settings > options tab > select CPUID Mask
What VMware utility can be used to determine whether a CPU contains features like SSE3, SSSE3, and NX/XD
CPU Identification Utility
