“Understanding and Managing Cassandra’s Vnodes + Under the Hood: Acunu Analytics” - In this talk, , Founder and CTO at , and , Software Engineer at Acunu Analytics, share the concept, implementation and benefits of virtual nodes in Apache Cassandra 1.2 & 2.0. They also go over why virtual nodes are a replacement to token management, and how to use Acunu Analytics to collect event data, build OLAP-style cubes and ask SQL-like queries via a RESTful API, on top of Cassandra. This talk was recorded at the DataStax Cassandra SF users group meetup.
Tom Pinckney of eBay discusses eBay’s new graph-based recommendation engine. The first part of the talk is spent on discussing the theory behind the recommendation engine and the conceptual pieces of how it works.
The second part of the talk is spent on discussing eBay’s implementation of Cassandra to implement the recommendation engine. In particular, the focus is on how eBay is able to use Cassandra to handle the tremendous scale that eBay needs for this kind of a recommendation system. As you can imagine, eBay has a tremendous amount of data that is constantly coming in. In using Cassandra, Tom explains how eBay is able to handle that load.
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(Original post with video of talk here)
Ben Engber, CEO and founder of Thumbtack Technology, will discuss how to perform tuned benchmarking across a number of NoSQL databases. He describes a NoSQL Database Comparison across Couchbase, Aerospike, MongoDB, Cassandra, HBase and others in a way that does not artificially distort the data in favor of a particular database or storage paradigm. This includes hardware and software configurations, as well as ways of measuring to ensure repeatable results.
Ben: Hi, My name’s Ben Engber. I’m the founder of a company called Thumbtack Technology. We are a consulting company, with one of our primary practice areas being doing NoSQL development and advising clients on NoSQL. And, the background of this talk is, you know, one of the things that comes up really often when we talk to clients, one of the first things they ask us is, ‘What NoSQL database should we use?’ And then, you know, the followup is, ‘Well, we need to learn a little bit about your business, so let’s do some discovery’. It’s the correct answer, but it often doesn’t go over that well. So, what we wanted to do, is we wanted to have sort of at least a basic baseline which would introduce them to the main concepts to give them right off the bat, and then sort of introduce a deeper discussion based on that.
So, about six months ago, we started researching within our company to do some NoSQL database comparisons, and research on the subject. And, this presentation is sort of presents a way that we can perform NoSQL database comparison. So, in some ways, what I’m going to do is come in and argue with everything that Will just said about why you can’t build an abstraction layer.