HBase Split
split是什么？
HBase的某个或多个region上的文件量达到一定规模，或者人工想拆分，就会进行split， 就是将各个region上的数据拆成两份（一定是一分为二，如果想分成三份就需要进行两次split）， 拆分一定是按某个key值，从key这里一切为二，小于key的在前面，大于等于key的在后面。
Solution of Minimum Height Trees
I have trained my algorithm on leetcode a period of time.
Today, I will explain my solution about Minimum Height Trees. My solution beat ~95% against others but it is hard to explain what is I do. Please allow me to introduce the solution from easy to hard. If you only need the last solution, jump to
记一次cloudera机器重装
先上结论：线上机器千万别没事yum update以及同类的升级操作
How to set the config.yml file
The config.yml file in the Freshman21 theme includes five parts.
First part is the site info.
How to install this theme
How to install Freshman theme?
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# please make sure you have already installed git tools and ruby tools(gem)
$ gem install sass
$ gem install jekyll
$ git clone https://github.com/yulijia/freshman21.git
