Introduction

With the work of optimizing the performance of MapReduce.
I do some solid work to understand the core source code of MapReduce.
And do some programming with the core code.
So there is something being introduced here to clean the way of compiling Hadoop on Ubuntu.

Introduction

I have participated in the

1

TOEFL

test in May, 17th. It is the third time I have the test.
Though I got the score 88 in this test, the score is not really good and far away from my forecasting.
So I want to record the experience here and this will motivate me to get better. Moreover, I make up my mind to write in English in the blog. Please supervise me, thank you.

Introduction

As TOEFL test being finally completed, I can enjoy the fun of playing with programs and servers.
Because

1

Cloudera

is still not installed on the new servers, I can do it just taking the time.
Since I have installed

1

Cloudera

on the Dell servers in our department, the progress is so easy for me. However, some of the processes are easy to forget. So I am writing this tips for retrieve later.

前言

曾今在本科的时候接触过

1

ROS

,那时候还是为了做3D建模.
最近由于一些原因又重温了一下

1

ROS

,发现如今的

1

ROS

越发强大和完善了,开源社区也非常活跃,越来越多开发者参与到其中.
就比如我今天要讲的

1

D Star

路径规划算法,也被人在

1

ROS

上实现了一把,并且用于

1

NAO

机器人的路径规划计算上面.

前言

这段时间看了coursera上面

1

机器学习基石

这门课程的相关内容,在这里留下一些记录