A replica set is a group of servers that maintain the same data set, with one primary which takes client requests, and multiple secondaries that keep copies of the primary's data. If the primary crashes, secondaries can elect a new primary from amongst themselves.
IPFS stands for InterPlanetary File System, but you could simply consider it as a distributed, permanent, but ridiculously slow, not properly functioning version of web. You could upload any static file and static website to IPFS. And the whole swarm would probably distribute your files to the moon, that might be why IPFS is so fucking slow.
You no longer need to use pip and virtualenv separately. Use pipenv instead.
Print Python stack traces without raising an exception.
Apex is a Go command-line tool to manage and deploy your serverless functions on AWS Lambda. Apex is also integrated with Terraform to provide cloud infrastructure management, for instance, configuring your AWS Lambda functions with Amazon API Gateway.