2. CouchDB
• CouchDb is a document-oriented database
• RESTFul
• JSON data format
• Map/Reduce
• Schema-free
3. Case Study
• Build is a analytic and tracking library that i
have build to to do custom tracking for
couple projects i am working on..
4. CouchDB looks good
• It's restful
"how about logging and tracking from both
client side and server side."
• Schema free
"So i can track all kind of actions with
different kind of meta data.Video playback,
View, Click, Enter and exit"
• Speed
5. Not quite...
• Higher latency
• Slow insert performance
• Slow view query index
• Large storage requirement
• Updating and locking issues
6. Speed up CouchDB -
Bulk operations
• Bulk operations for insert and delete
CouchRest
mydb.builk_save({
doc1, doc2
})
7. Speed up CouchDB -
Intelligent Sequential ID
• Optimize B-Tree storage
• Lower record size
• Free timestamps and index
# Couch ID
"_id":"012471a4cb6124ba54dd49204b41c46e"
#Generate timestamp
(Time.now.to_f *1000).to_i.to_s(16)
8. Speed up CouchDB -
Intelligent Sequential ID
"_id":"012471a4cb6124ba54dd49204b41c46e"
# Ruby
def created_at
Time.at(self.id[0, 11].to_i(10) / 1000)
end
#Javascript
var timestamp = parseInt(object._id.substring(0,11), 16);
var date = new Date(timestamp);
9. Speed up CouchDB -
View and updates
• View updating is slow (initial)
• Lower the number of emit() in your map
function
• Trade storage for speed
• Aggregation and Summerized records
10. Speed up CouchDB -
useful tips and bits
• CouchDB v0.10 - faster insert performance
• Compaction helps data storage size
• think about your data structure
• experimentation*
Alternitive
- MySQL myisam is decent for data warehousing
- Relational database for transactions ($)
- MongoDB for analytic
11. Thank you
• email: taylor.luk@idealian.net
• github: speedmax
• twitter : @taylor_luk
• blog : www.taylorluk.com
