djanowski

// Concurrently transform a MongoDB cursor into a stream of bulk MongoDB updates.
//
// Usage:
//
// const users         = db.collection('users');
// const usersToUpdate = users.find({ email: null });
//
// await eachAsyncUpdate(users, usersToUpdate, async function(user) {
//   const userEmail = await findUserEmail(user);
//

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?