mongodb lightning talk

mongo lightning.md

MONITAUR IS

instant, real-time server monitoring. written during rails rumble 2010. [show website] [<1 minute walkthrough]

MONITAUR USES

• rails 3 - mongoid - http://mongoid.org

• node.js - node-mongodb-native - https://github.com/christkv/node-mongodb-native

  • ssh

• redis - communication between the two

• MONGODB

  • 1 sample every 5 seconds (12 samples / minute) * every metric * every server
  • = 172,800 samples / day / server (10 metrics)
  • = easily 1 million samples within first 12 hours (10 servers)

GOTCHAS

OMG: all of these things became important in the last hour (and beyond) of rails rumble:

• use 64-bit if you don't know the difference

  • new user signups just stopped working even though saying inserts were ok
  • 32-bit db size is limited to 4GB (= small)

• capped collections

  • linode disk limited (we're cheap)
  • fast writes (which we throw out because we need to index it)
  • blow away /var/mongodb - it's ok!
  • account for indexes when specifying capped size

• mongorestore

  • build indexes last
  • BUG: mongorestore on osx doesn't bring in indexes

looks good...
might be good to demo setting up a new server because it's so easy

did you omit comments about indexes and capped collections intentionally?