Download - Couchbase presentation - by Patrick Heneise
GETTING COMFORTABLE WITH
Patrick Heneise, @PatrickHeneise
About.Me/PatrickHeneiseInformation Architect / Consultant
MSc. in Media Technology, Leiden University, NL
BSc. in Computer Science in Media, Furtwangen University, DE
Certified Software Engineer
♥node.js, , NoSQL
2 years CouchDB/Couchbase experience
AGENDA
Agenda
Introduction to Couchbase
Introduction to Document Design and Best Practices
Introduction to Views (Map, Reduce)
Introduction to memcached
Use Cases
Q&A
Not on the Agenda
Cluster Design
Deployment
Security
Advanced Document Design
Buckets/vBuckets
Couchbase ServerCouchDB
JSON Documents
Indexing and Querying
Map/Reduce
memcached
In-memory key-value store
Sub-millisecond latency
Distributed
Couchbase Server
Auto-Sharding (dynamically add new servers)
Management and monitoring
Data replication with auto-failover
Mobile synchronization
WHY NOSQL?
Why NoSQL?
No schema required
Interactive database engineering
Organic growth
Document/Object related
CouchDB
Use Cases
Information storage
Catalogues
Document-based information
How does it look like?{
“title”: “Barcelona”,“state”: “Catalonia”,“tagline”: “Best place to live in Europe”,“population”: 1621537,“tags”: [
“gaudi”, “sagrada familia”, “beach”, “sun”],“startups”: {
“itnig”: {“tagline”: “Make it happen”,“tags”: [“web development”, “marketing”]
},“desentia”: {
“tagline”: “design to go.”,“tags”: [“design”, “mobile”, “commerce”]
}}
}
Strings
Key Value
NumbersArrays
ObjectsNested Objects
How to interact with data?city.title
city.tags
city.tags[4]
city.startups.desentia.tagline
“Barcelona”
[“gaudi”, “sagrada familia”, “beach”, “sun”]
“gaudi”
“design to go.”
=>
=>
=>
=>
Where’s SELECT?
Map/Reduce Views
JavaScript or Erlang
Spatial Views
Views
function (doc, meta) {
if(doc.jsonType == 'city') {
emit(doc.title, doc.tagline);
}
}
-{- total_rows: 3,- rows:
[-
{- id: "barcelona",- key: "Barcelona",- value: "Best place to live in Europe"
- },-
{- id: "berlin",- key: "Berlin",- value: "Beer and Startups"
- },-
{- id: "london",- key: "London",- value: "Bloody Rainy"
- }- ]
-}
View all tagsfunction (doc, meta) {
if(doc.jsonType == 'city') {
doc.tags.forEach(function(tag) {
emit(tag, doc.title);
});
}
}
-{- total_rows: 12,- rows:
[-
{- id: "barcelona",- key: "beach",- value: "Barcelona"
- },-
{- id: "berlin",- key: "brandenburg gate",- value: "Berlin"
- },-
{- id: "berlin",- key: "cold",- value: "Berlin"
- },-
{- id: "berlin",- key: "DDR",- value: "Berlin"
- },...
JOINSfunction (doc, meta) {
if(doc.jsonType == "startup") {
emit([doc.city, 1], doc.title);
} else if(doc.jsonType == "city") {
emit([meta.id, 0], doc.title);
}
}
["barcelona",0] barcelona "Barcelona"["barcelona",1] desentia "desentia"["barcelona",1] itnig "itnig"["berlin",0] berlin "Berlin"["berlin",1] soundcloud "soundcloud"["london",0] london "London"
MAP/REDUCEfunction (doc, meta) {
if(doc.jsonType == "startup") {
emit(doc.city, 1);
}
}
_count
-{- rows:
[-
{- key: "barcelona",- value: 2
- },-
{- key: "berlin",- value: 1
- }- ]
-}
-{- rows:
[-
{- key: null,- value: 3
- }- ]
-}
group_level 0 group_level 1
memcached
Use Cases
Session Store
Always and fast changing data (user activity)
Stock exchange data
Game states
Pure key-value store
c.set("foo", 1)c.incr("foo") #=> 2c.incr("foo", :delta => 2) #=> 4c.incr("foo", 4) #=> 8c.incr("foo", -1) #=> 7
c.set("foo", "bar")c.set("foo", "bar", :ttl => 30)c["foo"] = "bar"
Examples
user:patrick:id => 1
user:patrick:lastPage => ‘/account’
farmhill:currentPlants => 5
farmhill:nextAvailablePlant => ‘Sunflower’
sess:abc:username => ‘patrick’
global:nextUserId => 15
DEMO
WHERE CAN I USE COUCHBASE?
Use CaseseCommerce Systems
Products, Session, Users, Sales, ...
Q/A Systems
Store a document per user with questions and answers
History Databases
Ancient Books, letters, transcriptions, ...
mCommerce Systems
Products, Location Information
Social Information Systems / Business Intranets
Timesheets, Project information
Wiki / CMS / Blog
Articles, Pages, ...
Gaming Systems
Game states, user data
...
Additional Information
couchbase.com / @couchbase / @jchris / @janl
couchbasemodels.com / @scalabl3
couchbase.com/docs/couchbase-manual-2.0/
couchbase.com/couchconf-berlin - CouchConf Berlin, Oct 30
Q&A
JOIN US ON MEETUP:THE-BARCELONA-COUCHBASE-GROUP
THANK YOU!
