Category: Druid

New releases: Metatron Discovery 3.2.4 & 3.3.0(rc1)

Again, we bring you new release news from Metatron Discovery! Starting with this release, the release cycle has changed to 3 weeks instead of 2 weeks to pay more attention to the completeness of the product. As the development period has increased, we intend to distribute it with more care for the integrity of the…
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What’s New: Apache Druid unified web console in Metatron Discovery

Apache Druid implemented unified web consle from 0.14 version. Before the console, Druid has three web consles for the coordinator, overlord and old-coordinator which are disconnected with each other. That’s why Apache Druid proposed new unified web console. (Still old consoles are existed.) Detail improvement history is linked here. We also have our own engine…
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How to deal with druid data ingestion failure

In a previous post we looked at how to put data into a druid via Metatron Discovery, and summarized some things to note. What to keep in mind when ingesting a data source to Druid from Metatron Discovery This time, I’ll show you how to deal with data ingestion failures. Check for data source load…
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What to keep in mind when ingesting a data source to Druid from Metatron Discovery

Getting data into a druid is not an easy job. This is especially difficult for those who are new to Druid. You have to set up unfamiliar options such as segment and granularity. And it is not easy to find out why when ingestion fails. So, today, I’ve just made a point of what to…
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Review the 10th Druid Meetup in Seoul, Korea

Last night was the Druid meetup day in Seoul! More than 50 Druid developers and users gathered to discuss opinions and have a meaningful time together. It was the event that most people attended so far. We are so happy for about it. Below is materials of last night sessions. Running TPC-H on Druid from…
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White paper of Druid optimized for Metatron

We happily introduce a white paper of Druid optimized version for Metatron! In the paper, we briefly tell you the background of original Druid development and characteristics of the Druid. Then we summarize performance test results of the original Druid. Lastly, we introduce Metatron and the optimized Druid. Refer to an attachment file for the…
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Running TPC-H using SQL in Druid

Since 2016, there have been frequent requests to run SQL in the druid. As a result, Apache Druid introduced it as a experimental feature (http://druid.io/docs/latest/querying/sql). Using it, we improve the function to support more powerful SQL than original’s. Here you can download the Metatron engine powered by Druid here. Built-in SQL in Apache Druid Apache…
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Monitoring Metatron system through Graphite

Graphite, a time series database optimized for time series data collection, is a pretty attractive tool for gathering system metrics. Druid is supporting Graphite emmiter extension in it. This extension emits druid metrics to a graphite carbon server. Detailed configuration information is linked here. This article describes how to monitor the Metatron system log using…
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Introduction to Map Analysis

It takes a long time to introduce metatron’s Map analysis. Druid’s metatron distribution now supports a variety of location-based analyzes. Upcoming releases will include some experimental features. We plan to release the completed version in 3.1.0 scheduled for January 2019, starting with the introduction of 3.0.5 from the upcoming release. We share a simple design…
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Evaluation on Druid

Evaluation on the Druid’s performance Since the Druid aims for real-time search data store, performance evaluation focuses on two aspects: – Query latency – Ingestion latency Minimizing consumed time on query processing and data ingestion is the key to being ‘real-time’. Following is the evaluations on Druid by Druid developers and SK Telecom. This paper…
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