The Redis way of Analytics with Python. As a workshop for Fifth Elephant conference 2012.

1. the redis way of analytics
ANOOP THOMAS MATHEW
Profoundis Labs Pvt. Ltd.
@atmb4u

2. Agenda
●
Learn basics of Redis
●
Learn basics of Python
●
Develop a web app with Django,
and get visitor analytics done –
yourself!

3. Getting Cozy
●
How many are you on UNIX machines?
●
How many heard about redis?
●
How many know python?
●
Installed python, redis server, redis-py
and django

4. What is redis?
●
A Key-Value store
●
An In-Memory Database
●
Really Fast - ~1,00,000 reads/sec
●
Pub/Sub message passing
●
Supported by VMWare
●
Developed by Salvatore Sanfilippo and
others
●
Opensource

5. Getting Started
sudo apt-get install redis-server
pip install redis
________________________________
import redis
redis_client = redis.Redis(“localhost”)

6. Basic Datastructures
String
Integer
List
Set
Ordered Set
Hashes

7. Basic Operations
String
redis_client.set(“key”, “value”)
redis_client.get(“key”)
>>> 'value'

8. Basic Operations
Integer
redis_client.set(“number”, 1)
redis_client.get(“number”)
>>> '1'
redis_client.incr(“number”)
redis_client.get(“number”)
>>> '2'
redis_client.get(“number”)
redis_client.decr(“number”)
>>> '1'

9. Basic Operations
List
redis_client.rpush(“member”, “ATM”)
redis_client.rpush(“member”, “HasGeek”)
redis_client.lrange("members", 0, -1)
['ATM', 'HasGeek']
redis_client.llen("members")
2
redis_client.lindex("members", 1)
'HasGeek'

10. Basic Operations
Set
redis.client.sadd("members", "Adam")
>>>True
redis_client.sadd("members", "Bob")
>>>True
redis_client.sadd("members", "Carol")
>>>True
redis_client.sadd("members", "Adam")
>>>False
redis_client.smembers("members")
>>>set(['Bob', 'Adam', 'Carol'])

11. Basic Operations
Ordered Set
redis.client.zadd("members", "Adam")
>>>True
redis_client.sadd("members", "Bob")
>>>True
redis_client.sadd("members", "Carol")
>>>True
redis_client.sadd("members", "Adam")
>>>False
redis_client.smembers("members")
>>>set(['Bob', 'Adam', 'Carol'])

12. Basic AOperations
Hashes
redis.client.hset("user:tom", "fullname", "Tom Sawyer")
1
redis_client.hset("user:tom", "password", "blah")
1
redis_client.hkeys("user:tom")
['fullname', 'password']
redis_client.hvals("user:tom")
['Tom Sawyer', 'blah']
redis_client.hgetall("user:tom")
{'fullname': 'Tom Sawyer', 'password': 'blah'}

13. Publish - Subscribe
pubsub = redis_client.pubsub()
pubsub.subscribe('red')
pubsub.publish('red', 'qube')
for item in pubsub.listen():
print item

14. Why use redis?
Sharing keys in-between realms
Faster read-write
Bit level storage access(setbit function)
Cheaper logging
In-memory caching
Master-Slave replication

15. Let's go Hands On!

16. Final Product!
https://bitbucket.org/atmb4u/hitcounter.git

17. Profoundis Labs
What we do?
&
We are hiring!
(atm@profoundis.com)

18. Get in Touch
atm@profoundis.com
@atmb4u
+91 - 999 53 44 675