Thanks so much! I did do that, and now I want to move to the next step. If possible, may I know more to move on? Thank you very much! -Rita :)
On Sat, Aug 14, 2010 at 8:49 PM, smith jack <[email protected]> wrote: > There is still a long way to go before you start debuging hadoop, > the first point is that, you should run hadoop first! > how to make this done. > simple run bin/start-all, then hadoop can response to your request. > you can use FsShell when you begin. > hope you will enjoy it > > 2010/8/15 Rita Liu <[email protected]>: > > Hi! > > > > I am a total beginner, but I am very interested in hadoop. I've already > > downloaded hadoop 0.19.2 and run on Ubuntu in single-node mode. Now I > want > > to do two things: > > > > 1. Explore how hadoop works internally with one of the example > applications > > hadoop provides > > 2. Write an application on my own > > > > Those two things bring me following questions: > > > > a. debugger? > > I am stuck since I don't know how to "explore" hadoop. I used to trace > > through the code using a debugger, but in this case, I don't know if > there > > is a good debugger to use; or -- maybe a debugger is not necessary for > > hadoop? If not, then how do you trace through the code to either debug or > > just gain an understanding about the system? May I know what you, > > experienced experts, do? :) > > > > b. Where to run hadoop? > > Also -- may I know where you run your hadoop? Do you run on linux, or on > VM > > -- in particular, Cloudera? I heard that Cloudera is good for writing > > mapreduce applications with hadoop itself as a blackbox; is it true? If > my > > ultimate goal is to understand how hadoop works internally, would it be > > better if I directly run it on linux? > > > > c. Single-node or multi-node? > > In the beginning (just like my case :p) would it be better to use > > single-node or multi-node? If the latter is true, should I obtain more > > machines, or should I use more virtual machines to create more nodes? > > > > As a newbie, I am sorry for all those basic (and silly, I know :$) > > questions. If possible, please help me out? Any suggestion or advice will > be > > greatly appreciated. Thank you very much! > > > > Best, > > Rita :) > > > > P.S. If my questions are not suitable for this mailing-list, please let > me > > apologize, and then, could you please direct me to other mailing-lists? > > Sorry, and thanks a lot! :) > > >
