GCP Compute Engine

Question 1

Zone

Answer 1

A data center which is inside a region. A region can have multiple zones in order to achieve high availability of the region as well as fault tolerant

Question 2

Region

Answer 2

GCP has more than 20 regions globally. The purpose of the regions is to support high availability as well as fault tolerant and adhering to the government policy and regulations

Question 3

Compute Engine

Answer 3

It is one of the GCP services where customers are able to create their own virtual machines and hosted them in a region.

Question 4

Machine Family

Answer 4

Machine family consists of three types which is

1) General purpose
2) Compute optimized
3) Memory optimized

Question 5

Machine Types

Answer 5

Giving the specifications of the VM which is the vCPU, memory.

example : E1-standards-2

E1 is machine family
Standards is type of workload suitable for the machine
2 is the number of vCPU

Question 6

Internal IP

Answer 6

Also called private IP. IP which is not exposed to the internet and only reachable via private network.
Private IP can have same value by different private network

Question 7

External IP

Answer 7

Known as Public IP as well. It is exposed to the internet. This type of IP is not constant and will be released if the VM is shutdown or reboot.

Question 8

Static IP

Answer 8

Static IP need to be reserved and once reserved, we can attach it directly to the VM. This static IP can replace the external IP and it will not be release even the VM is shutdown. However, static IP will be continuously charged even though it is not attached to a VM.

Question 9

Startup script

Answer 9

A startup script is used when a VM is needed to be bootstrapped where all the OS patches and software will be installed when the VM is created.

Question 10

Instance template

Answer 10

Instance template is another way to create a VM. An instance template can be created from a snapshot, disk, image, and also from a file in Cloud Storage. An instance template can create a VM or a group of VM call instance groups

Question 11

Image

Answer 11

An image is a copy of a VM OS and configuration. Have two types which is public image and custom image.
It can be used to create another VM and can be shared across different GCP projects.

Question 12

General purpose instance family

Answer 12

Best for price: performance ratio. Used for dev environments, database, web and application server

Question 13

Compute optimized instance family

Answer 13

Compute intensive application. Used for gaming application

Question 14

Memory optimized instance family

Answer 14

For high memory workloads. For in-memory large database and in-memory analytics

Question 15

Sustained use discount

Answer 15

Discount obtained when VM is used according to the workload level during the billing month. The higher the usage, the bigger the discount

Question 16

Committed use discount

Answer 16

Discount given by GCP if the VM is used with a dedicated time duration which is between 1 to 3 years time duration. Choose this when the workload is predictable

Question 17

Preemptible VM

Answer 17

Obtain up until 80% discount however the VM is only available for 24 hours or less. Can be terminated by GCP anytime depending on the available resources. Choose this type of VM when the workload is not important.

Question 18

Live Migration

Answer 18

VM is set to be automatically migrated to other host when there is hardware maintenance on GCP side to prevent system application down

Question 19

Availability Policy

Answer 19

There is two choice whether to choose
1) On host maintenance
2) Auto restart
However, VM with GPU can only be terminated. Preemptible VM is not applicable for this choice

Question 20

Sole Tenancy

Answer 20

We pick a dedicated hardware in the DC just for our resources to allocated on the specific hardware bench

Question 21

On host maintenance

Answer 21

Two choice:

1) Migration
2) Terminate

For VM with GPU, the VM can only be terminated.

Question 22

gcloud init

Answer 22

Used to initialize the configuration of the GCP project

Question 23

gcloud config set

Answer 23

To set the configuration of the project by stating property of the configuration

Question 24

gcloud config configuration

Answer 24

To manage different configurations for the project

Question 25

gcloud config list

Answer 25

List out all configurations associated to the project