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- Technical
Fourth Contact With a Monolith
“The thing’s hollow — it goes on forever — and — oh my God! — it’s full of stars!” It’s full of Spreadsheets! (DataFrames) (Source: Wikimedia Commons) Given that a dog, Laika, was the 1st astronaut to orbit the earth, it’s appropriate for a dog to travel through the wormhole. After travelling through the wormhole,...
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October 20, 2017 -
- Technical
Third Contact with a Monolith: Part C—In the Pod
A Simple Classification Problem: Will the Monolith React? Is It Safe?! Maybe a cautious approach to a bigger version of the Monolith (2km long) in a POD that is only 2m in diameter is advisable. What do we know about how Monoliths react to stimuli? A simple classification problem consists of the category (label) “no...
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September 29, 2017 -
- Technical
Third Contact With a Monolith—Beam Me Down Scotty
Regression Analysis is (relatively) easy Hypothesis: Using only a subset of GC metrics we can compute linear regression functions using only heap space used to predict when the next GC occurs. To do this we don’t need access to all the metrics per host, just a subset. And we can extend it in the future to...
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September 20, 2017 -
- Technical
Hello Cassandra! A Java Client Example
This is the third (and final) part of my blog-series on creating a demonstration Cassandra cluster, connecting, and communicating. We landed on the moon and made Second Contact with the Monolith (CQL shell) in our last blog, but what can we do to understand the Monolith better? Let’s explore Cassandra Java client program. Java Client...
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September 07, 2017 -
- Technical
Consulting Cassandra: Second Contact with the Monolith
(Source: Shutterstock) In the first part of this blog (Cluster Creation in Under Ten Minutes), I created a Cassandra cluster. In this part, we blast off to the Moon for 2nd contact. Consulting the Oracles Croesus: Hi Oracle. How will my war with Cyrus the Persian go? Oracle: If you proceed, a great empire will be...
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September 06, 2017 -
- Technical
Cassandra Cluster Creation in Under 10 Minutes
(Source: Shutterstock – edited) Enough Information I watched the classic movie “2001: a Space Odyssey” for the nth time on the weekend. My previous favourite quote from HAL (the eventually paranoid and murderous ship AI) was: Dave: Open the pod bay doors, HAL. HAL: I’m sorry, Dave....
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August 29, 2017