Guys,
Did someone try this thing ?
Thanks
On Tue, Dec 27, 2011 at 4:36 PM, praveenesh kumar wrote:
> Hey guys,
>
> How we can make hadoop as multiuser ?
>
> One way to think as whatever group we currently assigned to use hadoop,
> add users to same group and change permissions to hadoop.tmp.dir
There are a few options. Most of the times, using logging and a LocalJobRunner
turns out to be the easiest way. There is also Apache MRUnit you can use to
test your M/R code (which is a much better approach, IMO) -
https://cwiki.apache.org/confluence/display/MRUNIT
Remote debugging of tasks is
HI,
I want to debug my MR Job on Ubuntu machine using eclipse.
How can I do that, can anyone point me to the steps required?
Regards,
Shreya
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Are you running on Windows? There are quirks about closing and opening
files in read/write mode. You may be getting a sequencing error.
On Wed, Nov 30, 2011 at 9:09 AM, J. Rottinghuis wrote:
> The error is that you cannot open /tmp/MatrixMultiply/out/_logs
> Does the directory exist?
> Do you hav
By design reduce would start only after all the maps finish. There is
no way for the reduce to begin grouping/merging by key unless all the
maps have finished.
Sent from my iPhone
On Dec 28, 2011, at 8:53 AM, JAGANADH G wrote:
> Hi All,
>
> I wrote a map reduce program to fetch data from MySQL
Hi All,
I wrote a map reduce program to fetch data from MySQL and process the
data(word count).
The program executes successfully . But I noticed that the reduce task
starts after finishing the map task only .
Is there any way to run the map and reduce in parallel.
The program fetches data from M
