ChapterOneRSM.md

Part I - Foundation of Data Systems

Chapter1. Reliable, Scalable, and Matainable Applications

• An important idea is that data-intersive and compute-intensive are two different things
• There are 3 aspects for limitation of applications: amount of data , complexity of data, speed at which data is changing
• There are 5 functions for applications:
  • databases
  • caches
  • search indexes
  • stream processing
  • batch processing

From the book:

• store data so that they, or another application, can find it again later (databases)
• remember the result of an expensive operation, to speed up reads (caches)
• allow users to search data by keyword of filter it in various way (search indexes)
• send a message to another process, to be handled asynchronously (stream processing)
• periodically crunch a large amount of accumulated data (batch processing)

So based on the previous aspect, different databases varies.