Aws day 2
- 1. Amazon Web Services Infrastructure Essentials @2020 copyright KalKey training
- 2. Elastic Compute Cloud (EC2) Renting an instance on EC2 provides the same functionality as renting a server hosted and maintained by someone else; however, instead of renting hardware, you are renting an allocation of computational resources If EC2 is the basic fundamental block of AWS, then the other services (ex: ELB, EBS, S3, elastic IP, auto-scaling) are the building blocks of AWS. An EC2 instance is not scalable by itself. If your instance is active, then it consumes as much of its allotted resources as it can. To achieve a scalable cloud application using AWS, you must use more services than just EC2. Docs:Elastic Compute Cloud @2020 copyright KalKey training
- 3. Data Transfer Limits Network data transfer is the fundamental resource shared across the Internet. More commonly, the term bandwidth is used to describe data transfer across a network. Several AWS receive data through the Internet or send data across the Internet. AWS bills separately for data received (incoming) through the Internet and for data sent (outgoing) across the Internet. Useful:EC2 Pricing(scroll down for Data Transfer) @2020 copyright KalKey training
- 4. Data Transfer Limits For the services in the Free Usage Tier, all data incoming through the Internet is FREE. For the services in the Free Usage Tier, all data outgoing through the Internet is free for the first 15GB of total outgoing bandwidth. This limit is not applied to each service individually. ”There is no data transfer charge between Amazon EC2 and other AWS services within the same region.” Aside: AWS regions are related to where (geographically) data is hosted. In a nutshell, the only data transfer you pay for is what your application sends out to the Internet. @2020 copyright KalKey training
- 5. Data Transfer Usage Case Suppose that your application stores 8GB of data on S3. The bandwidth to send the data from your application to S3 is free (intraservice bandwidth is free) If each of your 4 team members independently download the 8GB of data from S3, then you will have 32GB of outgoing bandwidth. The Free Usage Tier only covers 15GB total for all services. You would be billed for 17GB outgoing data transfer, and any further outgoing data transfer until the next month. @2020 copyright KalKey training
- 6. Elastic Block Store (EBS) Block-level storage volumes for use with EC2 instances Use them like any block device (like a hard drive). EBS volumes are network-attached, and persist independently from the life of an instance Once mounted, the instance can interact with the volume as it would with a local drive, formatting it with a file system or installing applications on it directly. Storage volume sizes range from 1GB-1TB A volume can only be attached to one instance at a time, but many volumes can be attached to a single instance Suitable for apps that require a database, file system, or access to raw block level storage. @2020 copyright KalKey training
- 7. EBS Snapshots EBS provides the ability to back up point-in-time snapshots of your data to S3. Snapshots are incremental backups: only the blocks on the device that have changed since your last snapshot will be saved For Example: If you have a device with 100GBs of data, but only 5GBs of data has changed since your last snapshot, only the 5 additional GBs of snapshot data will be stored back to S3 Docs:Elastic Block Store Free: 30GB storage, 2 million I/Os and 1GB snapshot storage Unfortunately, this isn’t enough to facilitate AMI import/export despite being a common use case @2020 copyright KalKey training
- 8. Simple Storage Service (S3) S3 is a minimalistic data hosting service. Storing data and downloading data in S3 are billed separately. S3 only hosts dumb data (does not change unless you change it) S3 is appropriate for: Hosting static web pages (no server-side processing) Hosting large files (e.g. custom AMIs) Although S3 is commonly used to store custom AMIs, the Free Usage Tierdoes not provide enough S3 storage and bandwidth to do so freely. Docs:Simple Storage Service Free: 5GB storage, 15GB of data outgoing per month @2020 copyright KalKey training