Hadoop v2.0.5 – Why it’s important.

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A tutorial given at NAACL HLT 2013. Richard Socher and Christopher Manning http://nlp.stanford.edu/courses/NAACL2013/ Machine learning is everywhere in today's NLP, but by and large machine learning amounts to numerical optimization of weights for human designed representations and features. The goal of deep learning is to explore how computers can take advantage of data to develop features and representations appropriate for complex interpretation tasks. This tutorial aims to cover the basic motivation, ideas, models and learning algorithms in deep learning for natural language processing. Recently, these methods have been shown to perform very well on various NLP tasks such as language modeling, POS tagging, named entity recognition, sentiment analysis and paraphrase detection, among others. The most attractive quality of these techniques is that they can perform well without any external hand-designed resources or time-intensive feature engineering. Despite these advantages, many researchers in NLP are not familiar with these methods. Our focus is on insight and understanding, using graphical illustrations and simple, intuitive derivations. The goal of the tutorial is to make the inner workings of these techniques transparent, intuitive and their results interpretable, rather than black boxes labeled "magic here". The first part of the tutorial presents the basics of neural networks, neural word vectors, several simple models based on local windows and the math and algorithms of training via backpropagation. In this section applications include language modeling and POS tagging. In the second section we present recursive neural networks which can learn structured tree outputs as well as vector representations for phrases and sentences. We cover both equations as well as applications. We show how training can be achieved by a modified version of the backpropagation algorithm introduced before. These modifications allow the algorithm to work on tree structures. Applications include sentiment analysis and paraphrase detection. We also draw connections to recent work in semantic compositionality in vector spaces. The principle goal, again, is to make these methods appear intuitive and interpretable rather than mathematically confusing. By this point in the tutorial, the audience members should have a clear understanding of how to build a deep learning system for word-, sentence- and document-level tasks. The last part of the tutorial gives a general overview of the different applications of deep learning in NLP, including bag of words models. We will provide a discussion of NLP-oriented issues in modeling, interpretation, representational power, and optimization.

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At Facebook, we use various types of databases and storage system to satisfy the needs of different applications. The solutions built around these data store systems have a common set of requirements: they have to be highly scalable, maintenance costs should be low and they have to perform efficiently. We use a sharded mySQL+memcache solution to support real-time access of tens of petabytes of data and we use TAO to provide consistency of this web-scale database across geographical distances. We use Haystack datastore for storing the 3 billion new photos we host every week. We use Apache Hadoop to mine intelligence from 100 petabytes of clicklogs and combine it with the power of Apache HBase to store all Facebook Messages. This talk describes the reasons why each of these databases are appropriate for their workloads and the design decisions and tradeoffs that were made while implementing these solutions. We touch upon the consistency, availability and partitioning tolerance of each of these solutions. We touch upon the reasons why some of these systems need ACID semantics and other systems do not. We briefly touch upon some futures of how we plan to do big-data deployments across geographical locations and our requirements for a new breed of pure-memory and pure-SSD based transactional database.

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Michael Ralph Stonebraker is a computer scientist specializing in database research. He is currently an adjunct professor at MIT, where he has been involved in the development of the Aurora, C-Store, H-Store, Morpheus, and SciDB systems.Through a series of academic prototypes and commercial startups, Stonebraker's research and products are central to many relational database systems on the market today. He is also the founder of a number of database companies, including Ingres, Illustra, Cohera, StreamBase Systems, Vertica, VoltDB, and Paradigm4. He was previously the Chief Technical Officer (CTO) of Informix & a Professor of Computer Science at University of California, Berkeley. He is also an editor for the book "Readings in Database Systems"

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Personalized recommendations are ubiquitous in social network and shopping sites these days. How do they do it? As long as enough user interaction data is available for items e.g., products in shopping sites, a kind of recommendation engine based on what’s known as ' Collaborative Filtering' is not that difficult to build. Since the solution causes a combinatorial explosion, Hadoop can play a critical role in processing massive amount of data in collaborative filtering based solutions. In this presentations, I will cover a Hadoop based recommendation engine implementation using collaborative filtering.

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Why Hadoop is the New Infrastructure for the CMO?

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Big Data Cloud Meetup - Jan 29 2013 - Mike Stonebraker & Scott Jarr of VoltDB

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A Survey of Petabyte Scale Databases and Storage Systems Deployed at Facebook

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BigDataCloud meetup Feb 16th - Microsoft's Saptak Sen's presentation

BigDataCloud Sept 8 2011 Meetup - Fail-Proofing Hadoop Clusters with Automati...

BigDataCloud Sept 8 2011 Meetup - Big Data Analytics for DoddFrank Regulation...

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Hadoop v2.0.5 – Why it’s important.

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Hadoop v2.0.5 – Why it’s important.