In recent life, I always need to migrate data from excel sheets into MySQL. But in sometimes, I do some mess-up. For example, αβγ…These are not ASCII symbols. So when I do the migration, they will be Unrecognizable Code. The code I used at the first stage:
OK, I agree that processing large scale with Hadoop is cool, but sometimes, it makes me frustrated when I was doing my course project. Often, in the task of Map-Reduce, we will use join, as the input for the whole job may be muti-files.