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minutes.io

A Production CouchApp
and a Shitload of Replications

Gregor Martynus
@gr2m @minutes_io

Gregor Martynus

~~Developer~~ ~~Designer~~ ~~Business Buzzer~~ somethin' in between

♥ building products

♥ solving real life issues

♥ tools that help me do that

minutes.io?
simplest meeting tool since pen & paper.

immediate saving, automated synchronization
works on & offline
It just works™

engine room

started with

backbone.js
Rails
Postgres

migrated to

backbone.js
couchDB
nodeJS

and ♥CoffeeScript♥

Why?

Introduction of Accounts
Login with email & password

Accessing data across devices
=> Synchronization.

The it just works™- kind of
live Synchronization

Rails/Postgres
can do it.

CouchDB
is made for it.

right?

(teething) troubles

Replications
Replications
Replications
Replications

OS open files
open databases
ETS tables
Erlang process limit

But

no Couch/Replication problems
since 1 month:

minutes.io ♥ Iris Couch

minutes.io is a couchApp with a nodeJS proxy

FRONTEND: HTML5

local data, no internet connection needed.
Background Synchronization (decoupled, _changes & _bulk_docs)

PROXY: node.js

User sessions
Caching static assets
creating databases & replications

BACKEND: couchDB

database per user
continuous replications userDB => masterDB
database per shared meeting
continuous replications userDB <=> meetingDB <=> userDB
business logic / validations
static assets

NUMBERS

1898 user databases
1470 meeting databases
5102 replications