Having difficulty in mapreduce to understand
- by mahesh
Hi all,
I have seen the below link which is of getting started mapreduce with python
http://code.google.com/p/appengine-mapreduce/wiki/GettingStartedInPython
But still I am not able to understand how its working. I am executing below code but not able to understand what exactly is happening?
mapreduce.yaml
mapreduce:
- name: Testmapper
mapper:
input_reader: mapreduce.input_readers.DatastoreInputReader
handler: main.process
params:
- name: entity_kind
default: main.userDetail
mapreduce/main.py
#some code
class userDetail(db.Model):
name = db.StringProperty()
#some code
def process(u):
u.name="mahesh"
yield op.db.Put(u)
I am executing this and it gives me status = success in status page.
But not able to understand what happend
The main thing I want do with mapreduce is to search or count records from entity
So anyone can please help me??
Thanks in advance
