Category: Metatron Discovery

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Using Druid as a linked data source in Metatron Discovery

When creating a dashboard from a data source already loaded in Druid, it is often difficult to visualize with Metatron Discovery when complex queries such as subquery are required. In such a case, it can be solved by creating a Linked Datasource after creating an appropriate query using Druid SQL. 1. Data Set Use the…
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[New Feature Introducing]“Explain Plan”statement for Druid SQL

Druid SQL is a very convenient interface that allows you to execute queries on Druid in SQL format. However, Druid Query in JSON format still provides powerful features that Druid SQL cannot provide (for example, when you want to export query results in orc format). The problem is that the more complicated the Druid Query…
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Time Series Data Analysis Using Metatron Discovery

Metatron Discovery utilizes Druid as a data processing engine, and thus has many strengths in analyzing large time series based data. Metatron Discovery was developed to take full advantage of these features of Druid. In this example, we will explain how to analyze time series data using Metatron Discovery through an example. Visualizing time series…
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Data Preparation and Continuous Integration

After creating a nice dataflow, you’ll probably want to reuse the dataflow against another file or query result automatically (like daily-basis) or manually. Metatron Discovery’s data swapping feature is developed to enable this kind of works. Although Metatron Discovery itself doesn’t have scheduling ability, but you can use preptool, a CLI tool for data preparation…
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