Why newbies do not like MongoDB

The talk about "Why newbies do not like MongoDB" presented in lightning talks section on PyCon Russia 2013

Transcript

1. Why newbies do not like MongoDB spbmug.blogspot.com
2. Why MongoDB could be disliked?
3. Why MongoDB could be disliked? There are questions. There are no answers.
4. Newbie questions • How to link documents without joins? • How to keep documents structure without schema? • What is the correct documents structure? • Why MongoDB is running slowly?
5. How to link documents • No way.
6. How to link documents • No way • ObjectId(…) • DBRef(…) • Merging linked documents
7. How to keep documents structure • No way (again☺)
8. How to keep documents structure • No way • ODM • Scheme does not require
9. What is the correct documents structure
10. What is the correct documents structure The structure depends on: • the way you do queries • the way you display your data • the frequency of the inserts • the frequency of the updates
11. What is the correct documents structure You need to think of: • what the different entities do you have • what documents could be merged with the linked entities • what documents could you merge in packs • what the cost of your indexes • how would you shard your data
12. Why MongoDB is running slowly
13. Why MongoDB is running slowly • indexes • data structure • find(…).explain()
14. Why MongoDB is running slowly • indexes • data structure • find(…).explain() • mongodb-user-russian@googlegroups. com
15. Questions • www.mongodb.org/display/DOCS • www.10gen.com/what-is-mongodb • mongodb-user-russian@googlegroups.com • mongodb-user@googlegroups.com • stackoverflow.com/questions/tagged/mongodb spbmug.blogspot.com