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From Rita Liu <crystaldol...@gmail.com>
Subject Re: Hadoop basics
Date Sun, 15 Aug 2010 03:54:15 GMT
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 <thinke365@gmail.com> 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 <crystaldoll06@gmail.com>:
> > 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! :)
> >
>

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