This is the presentation that we gave at MongoBoston discussing issues running MongoDB server on a VPS system, specifically EC2.

1. MONGOHQ
I got 99 problems but a schema ain’t one

2. ABOUT MONGOHQ
• Hosted MongoDB
• How we got started

3. LIFE IN THE CLOUD
• Hosting MongoDB on a cloud VPS
• Lessons learned as a hosting provider
• What to expect from MongoHQ in the future

4. DISK I/O IS NOT WEB SCALE
• Virtualized I/O is variable
• File allocation is slow
• EBS RAID is better

5. EBS RAID
• RAID-0
• Much faster
• Harder to snapshot

6. SNAPSHOTTING RAID
• Snapshot queues
• Can’t be synchronized
• SLOW

7. SNAPSHOT ALTERNATIVES
• Multiple Slaves with --slavedelay
• Same benefits
• faster / easier recovery
• always consistent

8. FREEMIUM UNLEADED
Free Micro Small Large
• NOT for production
• lowers barrier
• customers first experience
• higher volatility

9. QUOTAS
• Weak implementation
• File based rather than size based
• Strange things happen when you approach it

10. 32-BIT ENVIRONMENT
• Don’t do it
• Under any circumstance
• Seriously

11. LIVE UPGRADING
• Using Master-Master
• Watch for old connections
• Stop replication first

12. BLEEDING EDGE ... IT HURTS
• MongoDB
• Drivers
• ODMs

13. WHAT TO EXPECT?
• Slave access on Large plans
• Dedicated plans with sharding & replication
• More AWS regions
• Slicehost & Rackspace support

14. QUESTIONS?
@mongohq
support@mongohq.com