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AWS SAA-C02 > Auto Scaling Group > Flashcards

Auto Scaling Group Flashcards

1
Q

Auto Scaling Group

Auto Scaling Group

A

ensures enough instances exist to meet demand

Auto Scaling Group

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2
Q

how it works

Auto Scaling Group

A

Scales in or out instances to match load

Auto Scaling Group

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3
Q

how to configure sizing

Auto Scaling Group

A

define minumum, maximum, and desired number of instances

Auto Scaling Group

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4
Q

interaction with LB

Auto Scaling Group

A

registers new instances with LB

Auto Scaling Group

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5
Q

treatment of unhealthy instances

Auto Scaling Group

A

terminated and replacements created

Auto Scaling Group

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6
Q

launch template

Auto Scaling Group

A

defines instance properties

Auto Scaling Group

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7
Q

features that can be defined (6/10)

launch template

A
  • AMI
  • Instance type
  • EC2 User data
  • EBS volumes
  • security groups
  • SSH key pair
  • IAM roles
  • VPC
  • Subnet
  • load balancer

launch template

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8
Q

scaling policies

Auto Scaling Group

A

trigger scaling events based on metrics

Auto Scaling Group

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9
Q

where alarms and metrics are

scaling policies

A

CloudWatch

scaling policies

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10
Q

scale-out policy

scaling policies

A

increases instances when alarm is triggered

scaling policies

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11
Q

scale-in policy

scaling policies

A

decreases instances when alarm is triggered

scaling policies

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12
Q

Scaling policy types (4)

scaling policies

A
  • Target tracking
  • simple / step
  • scheduled
  • predictive

scaling policies

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13
Q

Target tracking

Scaling policy types

A

keep a metric around target %

Scaling policy types

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14
Q

simple / step

Scaling policy types

A

scale change when CloudWatch alarm is triggered

Scaling policy types

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15
Q

scheduled

Scaling policy types

A

scale based on known usage patterns

Scaling policy types

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16
Q

predictive

Scaling policy types

A

continous monitoring and scheduling based on trends

Scaling policy types

17
Q

metrics usable for scaling (3)

scaling policies

A

CPUUtilization
RequestCountPerTarget
Average Network I/O

scaling policies

18
Q

scaling cooldown

scaling policies

A

no change after scaling action for set period

scaling policies

19
Q

purpose

scaling cooldown

A

allow metrics to stabilize

scaling cooldown

20
Q

ensures enough instances exist to meet demand

Auto Scaling Group

A

Auto Scaling Group

Auto Scaling Group

21
Q

Scales in or out instances to match load

Auto Scaling Group

A

how it works

Auto Scaling Group

22
Q

define minumum, maximum, and desired number of instances

Auto Scaling Group

A

how to configure

Auto Scaling Group

23
Q

registers new instances with LB

Auto Scaling Group

A

interaction with LB

Auto Scaling Group

24
Q

terminated and replacements created

Auto Scaling Group

A

treatment of unhealthy instances

Auto Scaling Group

25
Q

defines instance properties

Auto Scaling Group

A

launch template

Auto Scaling Group

26
Q
  • AMI
  • Instance type
  • EC2 User data
  • EBS volumes
  • security groups
  • SSH key pair
  • IAM roles
  • VPC
  • Subnet
  • load balancer

launch template

A

features that can be defined (6/10)

launch template

27
Q

trigger scaling events based on metrics

Auto Scaling Group

A

scaling policies

Auto Scaling Group

28
Q

CloudWatch

scaling policies

A

where alarms and metrics are

scaling policies

29
Q

increases instances when alarm is triggered

scaling policies

A

scale-out policy

scaling policies

30
Q

decreases instances when alarm is triggered

scaling policies

A

scale-in policy

scaling policies

31
Q
  • Target tracking
  • simple / step
  • scheduled
  • predictive

scaling policies

A

Scaling policy types (4)

scaling policies

32
Q

keep a metric around target %

Scaling policy types

A

Target tracking

Scaling policy types

33
Q

scale change when CloudWatch alarm is triggered

Scaling policy types

A

simple / step

Scaling policy types

34
Q

scale based on known usage patterns

Scaling policy types

A

scheduled

Scaling policy types

35
Q

continous monitoring and scheduling based on trends

Scaling policy types

A

predictive

Scaling policy types

36
Q

CPUUtilization
RequestCountPerTarget
Average Network I/O

scaling policies

A

metrics usable for scaling (3)

scaling policies

37
Q

no change after scaling action for set period

scaling policies

A

scaling cooldown

scaling policies

38
Q

allow metrics to stabilize

scaling cooldown

A

purpose

scaling cooldown

AWS SAA-C02 (47 decks)

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