All,
I am a developer, not a super networking guy or hardware guy, and new to
Hadoop.
I'm working a research project. Funds are limited. I have a compute problem
where I need to get the performance up on the processing of large text files
and no doubt Hadoop can help if I do things well.
I am
I ran into exact same issue and installed Eclipse 3.3.2. The problem did not
go away.
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I use
hadoop dfs -text path | head-n
hadoop dfs -text path | tail-n
to browse the n-th line from the head or from the tail. But it is slow
when the file is large. Is there any command that goes directly to a
specific line in dfs?
Shi
There is a way:
http://hadoop.apache.org/common/docs/r0.18.3/mapred_tutorial.html#DistributedCache
Are you working with a sparse matrix, or a full one?
On Apr 22, 2011, at 2:33 PM, aanghelescu wrote:
Hi all,
I am trying to perform matrix-vector multiplication using Hadoop.
So I have
I want to create a sequence file on my local harddrive. I want to write
something like this:
LocalFileSystem fs = new LocalFileSystem();
Configuration configuration = new Configuration();
SequenceFile.Writer writer = SequenceFile.createWriter(fs,
configuration,
new
I would recommend taking this question to the Mahout mailing list.
The short answer is that matrix multiplication by a column vector is pretty
easy. Each mapper reads the vector in the configure method and then does a
dot product for each row of the input matrix. Results are reassembled into
a
Did you try calling fs.setConf(configuration)?
On Apr 22, 2011 9:09 PM, W.P. McNeill bill...@gmail.com wrote:
