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What is “JSON” and what does it have to do with distributed computing?

“JSON” stands for “JavaScript Object Notation” and is an efficient way to transfer complex information about specific entities between two separate programs. As the “JavaScript” name implies, JSON is...

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Export a Microsoft Access Database to JSON (Northwind Example)

This article shows how to use a command-line utility to export an existing Microsoft Access database to a text file containing a single JSON structure. If you do not know what JSON is, please see my...

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Introduction to Cassandra Columns, Super Columns and Rows

This article provides new users the basics they need to understand Cassandra’s “column / super column / row” data model. Though the focus is not on mechanics, this article assumes you are familiar with...

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Utility to Denormalize JSON Structures by Consolidating Two Object Trees

This article is about a DivConq utility that denormalizes JSON structures by consolidating two object trees at a time. If you need to learn about JSON first, start here.  If you’re not sure why you’d...

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Migrate a Relational Database into Cassandra (Part III – Northwind Conversion)

This article describes how to convert a JSON document containing the complete contents of the Northwind Access database into Cassandra-friendly JSON. Before proceeding, you should understand my...

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Resolving JSON data types in Cassandra

In my previous entry I ask Why does Apache Cassandra have data types? So now that the rationale has been covered, what does that mean to us? At DivConq we like to move data around with JSON, as you can...

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Migrate a Relational Database into Cassandra (Part IV – Northwind Import)

This article shows how to prepare and import a dataset expressed in Cassandra-friendly JSON into a Cassandra datastore using Cassandra’s “json2sstable” utility. Before proceeding, you should understand...

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