System design notes

The above diagram shows how to synchronize data (copy to copy) from a remote database to a consolidated database across a network partition with HA, consistency is weak because the synch process is run periodically.

Ref: Link 

Load balancing: Reread glsb doc, and report notes here. 

Search Indexing: Start from wiki: https://en.wikipedia.org/wiki/Search_engine_indexing 

Read Google's paper PageRank and other technical papers on the topic.

The Google File System

• A distributed file system
• First, component failures are the norm rather than the exception
• Second, files are huge by traditional standards
• Third, most files are mutated by appending new data rather than overwriting existing data
• heart beats
• centralized master
•