Hi,all: I am starting to use hadoop recently.I have 3 questions,can somebody help me?
first question:I previously have some code under Windows and some .exe & .dll file.Does hadoop support calling the .exe & .dll files?Can I write a .bat file ? If not ,does it support some something like that for example the executable file & batch file under linux? If they do not support such things ,how can I use my existing .exe & .dll file? second question:Can I do a job(or task ) without using mapreduce on the hadoop dfs? This is because i have some code and do not want to change it.But i need the hadoop dfs to store my data which can not be stored on one machine . So I want to write some scheduling program to run my original code(or exe) on the dfs without mapred.Can i do that ? If I could ,how can I avoid moving data and schedul the job(or task) to the namenode that store the right data? Third question: Can I control which part of data is stored on which machine(namenode)?Are there any API ?If aren't,can i make it by easyly change some hadoop dfs code? Thank you! freeheart 07.10.13
