mblair

An Operator's Look at RethinkDB

Matt Blair - @mattyblair - Flipboard

The Getting Started Experience

• It's in Homebrew and just runs (relative to, say, HBase): awesome!
• Having packages for popular Linux distros (I use Ubuntu personally and at work): awesome!
• Serving the GPG key over HTTP: not so awesome :-/
• apt-get -y install rethinkdb
• It didn't start by default- great! I hate when services do this. I then looked at the start script to see how it knew (usually daemons use /etc/default/blah, but it has custom logic to see if there's anything in /etc/rethinkdb/instances.d, which is cool).

xcarpentier

'use strict'

class DataService
  @$inject: ['$http', '$log']
  constructor: (@http, log) ->
    log.debug 'DataService instance'
  countries: ->
    @http.get('/api/countries/')

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs