Database Basics for System Design Interviews

By Ajaypal Cheema in system design on

What are Databases? Databases are programs that either use disk or memory to do 2 core things: * record data * query data In general, they are usually always-on servers that are long lived and interact with the rest of your application through network calls, with protocols on top of TCP or…

Latency and Throughput

By Ajaypal Cheema in system design on

Latency Latency is the time it takes for a certain operation to complete in a system. Most often this measure is a time duration, like milliseconds(ms) or seconds(s). Typical Software System Latency Numbers: * Reading 1 MB from RAM: 0.25 ms * Reading 1 MB from SSD: 1 ms…