Distributed Deep Learning is not easy. While both Tensorflow and Caffe have distributed modes, they tend to be used for a single node super-box with lots of GPUs. That’s fine if the goal is to speed up training on a reasonable size amount of data, but what if the problem is that we have […]
Our hacker Yosef Kerzner who helps us with Hadoop and Big Data hacking does all other kinds of exploits. Here is his latest on SQL injection attacks. In December 2015 I joined a large consulting firm to perform vulnerability assessments and penetration tests, phishing assessments, and other projects in the realm of defending networks from […]
Another idea (which came about in a conversation with a security guardian at a company where I was teaching). Create millions of entries in the HDFS, and this will take it out of services. A few ways to do it: Write many small files with a script. Partition a Hive table on a key that […]
A while back, we described hacking Hadoop through the Cloudera Manager (CM) or through Ambari. But there is so much more to hack! Here is what I would do if I had a chance (this is just the first approximation of the list, comments are welcome). Hacking through CM or Ambari Try default passwords admin/admin Try […]
Today, many companies want to create their own custom training content, in their own format. We at Elephant Scale are experts at this. We created all of our own content – which we regularly use for training, and receive very good feedback – and we can help you create yours! For many demanding clients, we […]
Abstract In this paper, we show how to apply machine learning to pricing and discounts. The goal is to create the optimal discounting strategy, which results in maximizing the total retail income. To do this, we use machine learning to predict sales based on given combination of discounts, and then we formulate and solve a […]
Training is an important part of any business today. Whether it is reading a book, learning online, or learning in class, but the pace of innovation does not leave any other choice. In my earlier post, I explained why there is a place and time for online learning (MOOC) and in-class learning. Numbers bear this […]
Earlier today I saw an image from this tweet: I thought I saw a few problems with it. So I decided to give the readers a more useful and correct version. Here is where things go wrong. The tweet confuses the “Internet of Things” and routers with vulnerable firmware or services several times, which are […]
The merger of Baker Hughes with GE’s oil and gas division closed this Monday. Said Lorenzo Simonelli, the new chief executive of Baker Hughes and former chief of GE Oil & Gas “When we decided to complete this merger, it was really to create a transformation in the industry.” There are many aspects to this […]
At our Houston Hadoop Meetup, Austin Sun showed how to prepare for the Cloudera Data Scientist Certification exam. Austin has prepared for this presentation for quite a while, passed the certification himself, and now shared his experience with others. The certification is definitely recommended by Sujee Maniyam in his “Launching Your Career in Big Data” […]