A curated list of AWS resources to prepare for the AWS Certifications
A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.
| """Sample Slack ping bot using asyncio and websockets.""" | |
| import asyncio | |
| import json | |
| import signal | |
| import aiohttp | |
| from config import DEBUG, TOKEN | |
| import websockets |
| import asyncio | |
| import random | |
| q = asyncio.Queue() | |
| async def producer(num): | |
| while True: | |
| await q.put(num + random.random()) | |
| await asyncio.sleep(random.random()) |
| # For example, run "npm install" | |
| docker run -v "$PWD":/usr/src/app -w /usr/src/app node:4 npm install | |
| # This command creates a container (downloading one first if you don't have it locally), runs the command in a current directory and quits the container | |
| # Great Success! |
DynamoDB is a powerful, fully managed, low latency, NoSQL database service provided by Amazon. DynamoDB allows you to pay for dedicated throughput, with predictable performance for "any level of request traffic". Scalability is handled for you, and data is replicated across multiple availability zones automatically. Amazon handles all of the pain points associated with managing a distributed datastore for you, including replication, load balancing, provisioning, and backups. All that is left is for you to take your data, and its access patterns, and make it work in the denormalized world of NoSQL.
The single most important part of using DynamoDB begins before you ever put data into it: designing the table(s) and keys. Keys (Amazon calls them primary keys) can be composed of one attribute, called a hash key, or a compound key called the hash and range key. The key is used to uniquely identify an item in a table. The choice of the primary key is particularl
