how to shuffle sort mapreduce

Shuffling is the process by which intermediate data from mappers are transferred to 0,1 or more reducers. Each reducer receives 1 or more keys and its associated values depending on the number of reducers (for a balanced load). Further the values associated with each key are locally sorted.

http://stackoverflow.com/questions/22141631/what-is-the-purpose-of-shuffling-and-sorting-phase-in-the-reducer-in-map-reduce

how to install hadoop ubuntu

determine hadoop version if exists on ubuntu

how to mongodb win7

configure port
mongod --dbpath C:\Users\eyup\Downloads\mongodata --port 27017

configure log file for database
mongod --dbpath C:\Users\eyup\Downloads\mongodata --port 27017 --logpath C:\Users\eyup\Downloads\mongodata\logs\mongodb.log


run mongodb with configuration file.syntax problems with command prompt experienced

mongod -f C:\Users\eyup\Downloads\mongodata\config\mongodb.cfg

mongod -f "C:\Users\eyup\Downloads\mongodata\config\mongodb.cfg"

mongod --config "C:\Users\eyup\Downloads\mongodata\config\mongodb.cfg"


mongod --config C:\Users\eyup\Downloads\mongodata\config

mongod.exe --config C:\Users\eyup\Downloads\mongodata\config\mongodb.conf

mongod.exe -f C:\Users\eyup\Downloads\mongodata\config\mongodb.conf

how to install mongodb ubuntu

First import public key of 10gen repository in our system

 sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10

For Ubuntu:

echo 'deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen' | sudo tee /etc/apt/sources.list.d/mongodb.list

sudo apt-get update
sudo apt-get install mongodb-org

install robomongo app

sudo apt-get install robomongo-0.8.4-i386$
tar xvfz robomongo-0.8.4-i386.tar.gz
 robomongo-0.8.4-i386/bin$ ./robomongo

ubuntu@ubuntu:~$ sudo service mongod stop
mongod stop/waiting
ubuntu@ubuntu:~$ sudo service mongod start
mongod start/running, process 19201
ubuntu@ubuntu:~$ mongo --version
MongoDB shell version: 2.6.4

how to install mongodb windows8

platform

Windows Server 2008 R2 Standart 64 bit

download

mongodb-win32-x86_64-2008plus-2.6.4

extract

run mongod

 

 

 

 

 

 

 

 

 

 

connect test

run with config file?

Run as service?

Mongodb gui for windows

http://robomongo.org/

Robomongo-0.8.4-i386