Notes
1- Reliable, available and maintainable applications
- How important is reliability?
- Making change should be easy.
- There is a page about hardware faults, shouldn’t it need for a developer to learn Devops to have idea of that. IMO, developer should have idea ofuptime and if any errors can occur because ofdowntime.
2- Data models and query languages
3- Storage and retrieval
- This chapter talks about Balanced trees use in Database
5- Retrieval
12- Future of Data systems
Combining Specialized Tools by Deriving Data
- OLTP_database (read OLTP vs OLAP)
- PostgreSQL has a full text indexing feature.
- When copies of same data need to be created to satisfy different access patterns, be clear about the input and the output.
- Writing to both Database andsearch_index gives this problem
- Q. What is the meaning ofderieved_data here?
Schema migration of Railways
In 19th century there was issue of different rail gauge sizes and thus the trains that run of one gauge can’t go on other, restricting the interconnections.
- mapReduce has been mentioned in chapter 10, which i think I have also read about in Apache Spark