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Algorithms - Apache Mahout - Apache Software Foundation - Mahout - [wiki]
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... Reduce:
Evaluating MapReduce for Multi-core and Multiprocessor Systems
Map Reduce: Distributed Computing for Machine Learning
For Papers, videos and books related to machine learning...
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... in Mahout (or scheduled for implementation) please visit the following pages.
Logistic Regression (SGD)
Bayesian
Support Vector Machines (SVM) (open: MAHOUT-14, MAHOUT-232 and MAHOUT-334...
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| ... index and then computes distances between items that have co-occurrences. This is a fully distributed calculation.
VectorDistanceJob – Does a map side join between a set of "seed" vectors... |
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https://cwiki.apache.org/confluence/display/MAHOUT/Algorithms
Author: Grant Ingersoll,
2012-09-30, 00:00
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Collaborative Filtering with ALS-WR - Apache Mahout - Apache Software Foundation - Mahout - [wiki]
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....13 0.67 -0.52
1.39 0.05 0.45
item feature matrix M (items x features)
1.81 1.62 0.74
2.66 1.71 -1.08
1.73 -0.23 0.78
3.16 -0.24 0.90
We can than compute an approximation A...
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....71 1.40 2.94
2.94 3.32 2.75 4.79
Finding the decomposition
Mahout uses Alternating Least Squares with Weighted Lambda-Regularization to find the decomposition. Please refer to Large...
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[- hide]
| .../bin/factorize-movielens-1M.sh that shows how to do a simple holdout test on the Movielens 1 million ratings dataset. It also shows how to compute top-N recommendations from the resulting factorization:
Hints... |
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Please be aware that ALS-WR is an iterative algorithm. Iterative algorithms currently show poor performance on Hadoop caused by the enormous overhead of scheduling and checkpointing each single... |
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https://cwiki.apache.org/confluence/disp.../Collaborative+Filtering+with+ALS-WR
Author: Grant Ingersoll,
2011-11-09, 00:00
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Dimensional Reduction - Apache Mahout - Apache Software Foundation - Mahout - [wiki]
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... a vector over documents where the components are the relevance score), computing co-occurrences in a collaborative filtering context (people who viewed X also viewed Y, or ratings-based CF like...
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... of summation in A*A^t.times(v), you can do the same computation as one pass over the rows of A instead of two).
After k iterations of v_i = A.timesSquared(v_(i-1)), a k- by -k tridiagonal matrix has...
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| ... orthogonality (currently computed, but not checked against constraints).
Example: SVD of ASF Mail Archives on Amazon Elastic MapReduce
This section walks you through a complete example of running... |
| ...Reduce cluster for running Mahout jobs, please read the "Building Vectors for Large Document Sets" section of Mahout on Elastic MapReduce.
In the remaining steps below, remember to replace JOB... |
| ... of rows in E (i.e. E^T is n x p) the result of the matrixmult would give me an m x p matrix (m=6076937, p=87).
However, in practice, computing the matrix product of two matrices as a map... |
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https://cwiki.apache.org/confluence/display/MAHOUT/Dimensional+Reduction
Author: Grant Ingersoll,
2011-11-09, 00:00
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Use an Existing Hadoop AMI - Apache Mahout - Apache Software Foundation - Mahout - [wiki]
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... Access Key
X.509 certificate and private key (e.g. cert-aws.pem and pk-aws.pem)
EC2 Key-Pair (ssh public and private keys) for the US-EAST region.
Please make sure the file permissions...
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... are "rw------" (e.g. chmod 600 gsg-keypair.pem). You can create a key-pair for the US-East region using the Amazon console. If you are confused about any of these terms, please see: Understanding...
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[- hide]
| ...://ec2-???-???-???-???.compute-1.amazonaws.com:50030
Setup FoxyProxy (FireFox plug-in)
Once the FoxyProxy plug-in is installed in FireFox, go to Options > FoxyProxy Standard >... |
| ...; Options to setup a proxy on localhost:6666 for the JobTracker and NameNode Web UI URLs from the previous step. For more information about FoxyProxy, please see: FoxyProxy
Now you are ready... |
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https://cwiki.apache.org/confluence/display/MAHOU.../Use+an+Existing+Hadoop+AMI
Author: Grant Ingersoll,
2011-09-09, 00:00
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[OT] Internships at LucidWorks - Mahout - [mail # user]
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...@lucidworks.com. (In other words, please do not reply here) To learn more about LucidWorks, visit http://www.lucidworks.com. REQUIREMENTS . Interest in working on high performance and large scale problems...
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..., Hadoop and Mahout (or other machine learning libraries) is a plus . Core Java knowledge . Eagerness to learn and to apply knowledge to real problems . Working on a Computer Science...
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Author: Grant Ingersoll,
2013-02-13, 20:57
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[Job] Sales Engineer at Lucid Imagination - Solr - [mail # user]
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...'ve included the job description below. If you are interested, please send your resume (off-list) to [EMAIL PROTECTED]. The position is based out of our Redwood City, CA office...
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... in Engineering or Computer Science preferred. 3+ years of IT Consulting and/or Professional Services experience required. Experience working with Lucene and/or Solr required. Experience with enterprise...
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Author: Grant Ingersoll,
2012-01-17, 14:01
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[JOB] Student Wanted for small Machine Learning project - Mahout - [mail # user]
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... interested, please email me your qualifications, contact information and availability at [EMAIL PROTECTED]. If you do not already have a cluster, I will pay for compute time on EC...
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Author: Grant Ingersoll,
2011-01-14, 23:20
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Brainstorming on Improving the Release Process - Lucene - [mail # dev]
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...(Long post, please bear with me and please read!) Now that we have the release done (I'm working through the publication process now), I want to start the process of thinking about how we...
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... on ASF resources on a regular basis? If it's a computing resource issue, let's go to Infrastructure and ask for resources. Infrastructure has repeatedly said that if a project needs resources...
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[- hide]
| .... All of that can be automated. Also, please think hard about whether the things you test can be automated and built into our test suite or at least run nightly or something on Jenkins... |
| ... of these, then we are not ready to release. 5. Most of the steps in http://wiki.apache.org/lucene-java/ReleaseTodo under the Branching & Feature Freeze section can be automated. Same... |
| ...://cwiki.apache.org/confluence/display/OPENNLP/TestPlan1.5.1. It starts by everyone addressing #1 above on our Wiki. See http://wiki.apache.org/lucene-java/TestPlans and http://wiki.apache.org/solr/TestPlans for a starting spot. 2... |
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Author: Grant Ingersoll,
2011-03-30, 12:22
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