< All CompTIA Cloud+ Notes

tsirhCdneM | CompTIA Cloud+ | Module 7

By: Raul Pop | Related Course: CompTIA Cloud+ | Published: June 12, 2017 | Modified: June 12, 2017
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NotepadAllocation and Optimizing

VM and Host Resource Allocation

Configuration Practices

Common Issues

Common Performance Concepts

 

VM and Host Resource Allocation

Resources

Memory

CPU

Disk space

 

Quotas

Quotas are the total amount of resources that a VM can use

Hard-maximum amount of resources

Soft-allows a user to exceed maximum amount

 

Licensing

Allows an origination to use the software

Most expensive part of the install

The license agreement should be read

 

Reservations

A set aside of resources given to the customer or VM

VM will always get a set level of resources

 

Resource Pools

Resources set aside for a VM

Possible for the resources to be diveded for a specific groups

Provide organizations

 

Dynamic Resource Allocation

Best performance

Availability

Capacity arrangements

Helps reduce power costs

 

Physical Resource Redirection

External modem

Handheld device

File on the host computer

Printers

Scanners

Dongles

USB Device

 

Configuration Practices

Memory Ballooning

Swap Disk Space

CPU

Disk and Disk Performance

 

Memory Ballooning

Memory is typically the limiting factor

Ballooning allows the OS to exceeded the limits loosely

Usually requires a third party software

 

Swap Disk Space

When all physical memory has been issued swap disk space can be used

Similar to page file but for VM

 

CPU

Typically VM,  are limited to how many cores a CPU has

Faster CPU allow for more request to be achieved

If VM or host is performing slow to many process might be running

 

Disk and Disk Performance

Disk speeds can limit the VM

RAID can improve performance and allow for fault tolerance

 

 

Common Issues

Common Failures with Disk

Physical HARD Disk Failures

Disk Corruption 

HBA Fails

 

Common Failures with Memory

RAM Failures

Swap Files out of Space

 

Common Failures with Network

NIC Failures

Speed/Duplex Mismaches

External devices Fail

 

Common Performance Consideration

Disk

Caching

Network

Bandwidth

Latency

Quality of Service(QOS)

Multipathing

Load Balancing


< All CompTIA Cloud+ Notes
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