MongoDB is increasingly popular in China, especially among startups for its flexibility and speed, though challenges such as stability and a lack of skilled engineers remain. The document discusses various use cases of MongoDB including applications in mobile gaming, SNS, IPTV, and job sites, highlighting both advantages and issues faced by companies in these sectors. The author, Steve Mushero, emphasizes the bright future for MongoDB in the Chinese market despite current hurdles.

1. Running the World’s Internet Servers
MongoDB
Chinese Use Cases
By Steve Mushero
CEO of ChinaNetCloud
Server Management Ÿ Cloud computing Ÿ Audit & Optimization Copyright © 2013 ChinaNetCloud

2. About Steve
Founder, CEO & CTO of ChinaNetCloud
• Before that, CTO of Tudou (土豆网)
8 years in China
• Lived in Silicon Valley, Seattle, and New York
25 years experience as a CTO
• Experience in development and operations
• Decades of DBA, performance, security experience
• Remembers flat file, network, IMS databases
Running the World’s Internet Servers www.ChinaNetCloud.com 2

3. About ChinaNetCloud
§ Founded in Shanghai in 2008
• By Silicon Valley Technology Guys
§ Vision: Run All the World's Internet Servers
• It’s out job to run the Internet
§ We manage servers and systems
• For Chinese Internet and Game Companies
§ Thousands of Servers - Hundreds of Customers
• We've seen systems of every type and size
• We are hiring – Linux Engineers / System Admins
Running the World’s Internet Servers www.ChinaNetCloud.com 3

4. Chinese Internet Situation
Mostly PHP & MySQL
Some MongoDB
Databases
Less PostgreSQL
A bit of Oracle
Hadoop & things
Running the World’s Internet Servers www.ChinaNetCloud.com

5. Chinese Internet Situation II
Still growing fast
Startups move fast
Startups & Value flexibility (schema-free companies)
Applications
Resume-building helps adoption
Lots of mobile apps in 2012/2013
Lots of new startups
E-Commerce FINALLY growing
But lots of dating, SNS, games, etc.
Running the World’s Internet Servers www.ChinaNetCloud.com

6. MongoDB General Use Cases
1 Flexible-Structure Document Database
2 Non-relational Database, networks, analysis
3 High-Performance Database
4 Replication with multi-Master Write
5 Sharding for large data sets
6 Basic datastore to replace RDBMS
Running the World’s Internet Servers www.ChinaNetCloud.com

7. Major Challenges
Stability
Locking
Tuning
Competition from Redis, MySQL
In China, lack of skilled engineers
In China, Hadoop suddenly sexy
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8. Cases
Mobile Gaming
SNS Travel
IPTV Company
Baby Care Site
Job & Resume Site
Running the World’s Internet Servers www.ChinaNetCloud.com 8

9. Big Game Company
Why § Big data for logs, Users to a lot of things
§ Unstructured logs
§ Good
Experience § User log analysis and data
§ Core data simple key-value, Redis/MySQL
§ Lazy write to DB, first in Memcache q Runs several mobile games
Interesting § Works well for write-heavy systems
§ Also for Game status data, all write
q Each in several countries
Problems § Early on stability, locking q Most on several platforms
§ Now runs well
§ High-speed, schema-free
Pro/Con § Slow to restart, reload data
Running the World’s Internet Servers www.ChinaNetCloud.com 9

10. SNS Travel Site / App
§ Schema free
Why
§ High Performance
§ Good
Experience § Core data system, relatively unusual
§ Core data system
Interesting § Core user relationships & travel plans
§ Backup every hour via Mongo Dump for safety
q Lots of data
q Lots of pictures
§ Version 1.6 crashed and lost all data
Problems § Now runs well with 2.0 q Complex travel
Pro/Con § Schema-free
§ Need experienced people when there are problems
Running the World’s Internet Servers www.ChinaNetCloud.com 10

11. IPTV Company
§ Complements MySQL
Why § For unstructured & business-related data
§ Good with 2.0 now
Experience § Lock time ratios high for a long time, 75%+
§ User log analysis and related data
§ Find high performance IO powerful in 2.0
Interesting § Load only 100 requests/second, multi-instance q Lots of users
§ Mostly 32GB RAM, medium-sized
q Lots of data
Problems § 1.x Stability issues q High uptime
§ Lack of experts to help them
§ Complex analysis easy
Pro/Con § Lack of skills
Running the World’s Internet Servers www.ChinaNetCloud.com 11

12. Baby Care Site
§ Performance to 50M PV/day
Why § Lots of data (~100GB already)
§ Sharding if needed
§ Good so far
Experience § Not really scaled yet
§ Data growing fast (comments / BBS)
§ Lots of text / comments
Interesting § No MySQL or other backing DB q Fast
q Large data
Problems § Locks, server seems normal q Flexible
§ Have to restart – ongoing issue
§ Schema Free data
Pro/Con § Closely matches business model
Running the World’s Internet Servers www.ChinaNetCloud.com 12

13. Job & Hiring Site
§ Very fast development / limited time
Why § Flexibility as needs / app changing
§ Popular with staff, improve resumes
§ Mostly 64 GB RAM
Experience § Medium load – 500-1500 requests/sec
§ Random Global Locks suddenly in 2.0
§ Using sharding
Interesting § Using replication to balance load q Complex data
§ Also tracking logs, analyis
q High concurrency
§ Locks, server seems normal
Problems
§ Have to restart – ongoing issue q Constant change
§ Lack experience on tuning
§ RAM overflow on Master
§ Schema Free data
§ Good for storing OO objects in DB
Pro/Con § Closely matches business model
§ Stability Issue / Manageability
Running the World’s Internet Servers www.ChinaNetCloud.com 13

14. Summary
§ MongoDB is new in China
§ MongoDB is sexy in China
§ Lots of interest
§ Well-suited for many startups
§ Especially for flexibility and speed
§ Some challenges
§ Stability
§ 2.x much better
§ Lack of talent
§ More events !
§ Bright future in China
Running the World’s Internet Servers www.ChinaNetCloud.com 14

15. Questions
?
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