EC2 Purchase Options Flashcards
1
Q
EC2 Instance Purchasing Options
A
- On-Demand
- Reserved
- Convertable reserved
- Saving Plan
- Spot Instances
- Dedicated Hosts
- Dedicated Instance
- Cpacity Reservations
2
Q
EC2 On Demand
A
- Short-term and un-interrupted workloads where you can’t predict how the application will behave
- Pay for what you use
Linux/Win, bill per sec after first min
All other OS, bill per hour - Highest cost
- No upfront payment
- No long-term commitment
3
Q
EC2 Reserved Instances
A
- Reserve specific instance attributes (Instance Type, Region, Tenancy, OS)
- Reversation Period - 1 or 3 years
- Payment options - No Upfront, Partial Upfront, All Upfront
- Reserved Instance Scope - Region or AZ
- Can buy and sell in Reserved Instance Marketplace
- Recommended for steady-state usage application (like DB)
4
Q
EC2 Convertible Reserved Instances
A
- Can change the EC2 instance type, instance family, OS, Scope and enancy
- Up to 66% discount
5
Q
EC2 Savings Plans
A
- Discount based on long-term usage (up to 72%)
- Commit to a certain type of usage ($10/hr for 1 or 3 years)
- Beyond billed at On-Demand price
- Specific instance family & region
- Flexible across:
Instance size,
OS
Tenancy (Host, Dedicated, Default)
6
Q
EC2 Spot Instances
A
- Up to 90% discount
- Can lose at any point if your max price is less than the current spot price
- MOST cost efficient instances
- Workloads that are resilient to failure
- Not suitable for critical jobs or DBs
7
Q
EC2 Dedicated Hosts
A
- Most expensive
- A physical server with EC2 capacity fully dedicated for your use
- Address compliance requirements
- Use existing server-bound sw licenses
- Software that have complicated licensing model (BYOL - Bring your own license)
- Companies that have strong regulatory or compliance needs
Purchase Options
On-demand
Reserved
8
Q
EC2 Dedicated Instances
A
- Runs on hardware dedicated to you (diff from server)
- May share hardware with other instances in same account
- No control over instance placement (can move after stop/start)
9
Q
EC2 Dedicated Instances vs. Dedicated Hose
A
Dedicated Instance
Have own instance on your own hardware
Dedicated Host
Get access to physical server and visibility to lower level hardware
10
Q
EC2 Capacity Reservations
A
- Reserve On-Demand instance capacity in a specific AZ for any duration
- You always have access to EC2 capacity when you need it
- No time commitment (create/cancel any time)
- No discount
- Combine with Regional reserved Instances and Savings Plans to benefit from billing discounts
- Charged at On-Demand rate whether you run instances or not
- Short-term, uninterrupted workloads that need to e in a specific AZ
