Elastic Cloud Compute(EC2)

provides resizable compute capacity in the cloud.

EC2 Options

1. On-demand

• It allows you to pay a fixed rate by hours.
• Perfect for users who wants the low cost and flexibility EC2.
• An application with short-term, spiky, or unpredictable workloads that cannot be interrupted.
• An application being developed or tested on EC2 for the first time.

2. Reserved Instances

• Provide a capacity reservation, less cost than on-demand but require long-term commitment 1–3 years.
• Applications will steady state or predictable usage.
• Applications are required reserved capacity.
• Have three options:

▹ Standard RI: up to 75% off on-demand

▹ Convertible RI: up to 54% off on-demand

▹ Scheduled RI

3. Spot Instances

• Enable you to bid whatever price you want for instance capacity.
• If the price for instances running out, instance terminate immediately.
• Applications that have flexible start and end times.
• Applications that are only feasible at very low compute prices.
• User with an urgent need for a large amount with computed capacity.

4. Dedicated Hosts

• Physical EC2 server dedicated to your use.
• Useful for regulatory requirements that may not support multi-tenant virtualization.
• It can be purchased as On-demand or RI.

EC2 Instance types

• F1 — Field Programmable Gate Array — Genomic research, financial analytics, real-time video processing, big data, etc.
• I3 — High-speed storage — NoSQL, DBs, Data Warehousing, etc
• G3 — Graphic Intensive — Video Encoding/ 3D Application Streaming.
• H1 — High Disk, Throughput — MapReduce-based workloads, distributed file systems such as HDFS, and MapR-FS.
• T2 — Lowest Cost, General Propose — Web Server/Small DBs.
• D2 — Dense Storage — File-servers/Data Warehousing/Hadoop.
• R4 — Memory Optimized — Memory Intensive Apps/DBs.
• M5 — General Purpose — Application Servers.
• C5 — Compute Optimized — CPU Intensive Apps/DBs.
• P3 — Graphics/General Purpose GPU — Machine Learning, BitCoin Mining, etc.
• X1 — Memory Optimized — SAP HANA/Apache Spark, etc.
• Z1D — High compute capacity and a high memory footprint — IDeal for electronic design automation (EDA) and certain relational database workloads with high per-core licensing costs.
• A1 — Arm-based workloads — Scale-out workloads such as web servers.
• U-6tb1 — Bare Metal — Bare metal capabilities that eliminate virtualization overhead.

Security Groups

• A security group is a virtual firewall controlling traffic to your EC2.
• All inbound traffic is blocked, all outbound traffic is allowed by default.
• Changes to security groups take effect immediately.
• You can not block a specific IP address by using Security Groups ( instead use Network Access Control List).
• Only specify allow rules, but not deny rules.

Placement Groups

When you launch a new EC2 instance, the EC2 service attempts to place the instance in such a way that all of your instances are spread out across underlying hardware to minimize correlated failures.

1. Cluster Placement Group

• A group of instances within a single AZ and can not span multi-AZ
• Low latency, high network throughput

2. Partition Placement Group

• Max 7 partitions in one AZ, mutil-AZ.
• Multiple EC2 instances HDFS, HBase and Cassandra.

3. Spread Placement Group

• Max 7 partitions in one AZ, multi-AZ.
• For email, file server.
• Individual Critical EC2 instances.