Apache Druid 24.0 contains over 324 updates from over 63 contributors.
This release marks a significant leap forward for the Druid engine. In this release, we’ve introduced two groundbreaking features – A multi-stage query (MSQ) engine and support for nested JSON columns.
The multi-stage query engine marks the first step toward a universal query engine that’s both low latency and highly versatile. In this release, the Multi-Stage Query Engine enables you to transform and ingest batch data in Druid using SQL, simplifying the data prep process and tooling needed before ingestion. It is also highly performant; based on our benchmarking, it’s at least 40% faster than the native Druid batch ingestion engine.
Nested Column support enables you to ingest nested JSON columns and retain the nested structure while providing the fast performance you expect from Druid during querying. Visit the Apache Druid download page to download the software and read the full release notes detailing every change. The features in this Druid release are also available with Imply’s commercial distributions of Apache Druid.
Multi-Stage Query Engine and SQL Based ingestion
Before this release, in order to load data into Druid, you’d need to learn to use the Druid ingestion spec. Some users find this confusing as they are much more familiar with SQL. With Druid 24.0, you can now use SQL queries to load data into Druid. This is made possible through the introduction of the multi-stage query engine (MSQE).
MSQE offers much more than syntax sugar over classic ingestion. You can now use SQL to perform transformations that are not possible in classic ingestion. Unlike current Druid queries, MSQE queries run as tasks. This means queries can run for much longer. MSQE queries also support data shuffle operations, which are essential for large-scale ingestion.
This version of Druid comes loaded with demo queries to illustrate the capabilities of the new query engine. To access the demo queries, simply open Druid’s query editor and select “Demo queries” from the dropdown menu below:
To help ease the transition into the new engine, it is now easier to connect with external data sources and generate the corresponding SQL query for data ingestion. The web console helps you parse the incoming data’s schema and generate the corresponding SQL query.
If you have an existing Druid ingestion spec, you can also use the built-in tools to convert it into a SQL-based ingestion query.
As part of this work, we have also revamped the query editor in the Druid web console. The query editor now features tabs! It can help you organize your workspace.
With tabs, you can now attach to previously run queries by expanding the “Recent query task panel” at the top right corner of the query editor.
Once expanded, you can select from any of the queries listed to show current progress.
The new query engine has significantly improved live query reporting. Now you can monitor the progress of your queries in detail.
The new MSQE-powered SQL batch ingestion experience is now our recommended method to load batch data into Druid. Please give it a try!
Nested Columns
Real-world data often comes in nested shapes. Originally, most relational databases required data to be flattened into tables for loading and processing. Then came along document stores such as MongoDB and Elasticsearch, where the entire nested object can be stored as-is, greatly improving flexibility for developers.
In this release of Druid, we are introducing support for Nested Columns. It’s as simple as specifying the data type as “JSON” as part of your data ingestion spec. If you are using the new SQL-based batch ingestion, you can simply specify the column type to be “COMPLEX<json>”.
Once loaded, you can use functions like JSON_VALUE, JSON_QUERY, and others to query the data stored in the nested column. You can expect performance that matches or exceeds the performance of other Druid column types. For columns that are numerical types, you can expect 10-50% better performance when they are part of a nested JSON column.
In coming releases, we will be adding support for nested column support in formats beyond JSON, including Avro, Parquet, and Protobuf.
Other highlights
ZStandard(zstd) compression. This is a new option to compress data. It is about 8-10% smaller in terms of storage, but 25-80% slower on query reads. It is useful for storing large volumes of infrequently accessed data.
Kinesis ingestion improvements. We’ve made progress on better supporting Amazon Kinesis ingestion. The system can now gracefully handle empty shards and resharding, improving overall reliability.
Vectorization improvements. We have been continuously making improvements to query performance. In this release, we have added vectorization support for LATEST() and EARLIEST() aggregators. Those aggregators now perform up to 3X faster.
Experimental Java 17 support. Java 17 provides a new runtime environment that includes a new garbage collector. Early performance testing has shown some improvements with this new version of Java. We will continue to work on testing and fixing issues on the latest version of Java in coming releases.
Metrics
Druid 24.0 includes additional metrics and metric dimensions to help you better monitor and operate a Druid cluster:
segment/rowCount/avg
segment/rowCount/range/count
query/segment/time
worker/task/failed/count
worker/task/success/count
worker/taskSlot/idle/count
worker/taskSlot/total/count
worker/taskSlot/used/count
Want to contribute?
We’re very thankful to all of the contributors who have made Druid 24.0 possible – but we need more!
Are you a developer? A tech writer? Someone who is just interested in databases, analytics, streams, or anything else Druid? Join us! Take a look at the Druid Community to see what is needed and jump in.
Try this out today
For a full list of all new functionality in Druid 24.0, head over to the Apache Druid download page and check out the release notes!
Other blogs you might find interesting
No records found...
Jun 01, 2023
Introducing Schema Auto-Discovery in Apache Druid
In this blog article I’ll unpack schema auto-discovery, a new feature now available in Druid 26.0, that enables Druid to automatically discover data fields and data types and update tables to match changing...
Apache Druid® 26.0, an open-source distributed database for real-time analytics, has seen significant improvements with 411 new commits, a 40% increase from version 25.0. The expanded contributor base of 60...
Should You Build or Buy Security Analytics for SecOps?
When should you build—or buy—a security analytics platform for your environment? Here are some common considerations—and how Apache Druid is the ideal foundation for any in-house security solution.
Druid now has a new function, Unnest. Unnest explodes an array into individual elements. This blog contains design methodology and examples for this new Unnest function both from native and SQL binding perspectives.
What’s new in Imply Polaris – Our Real-Time Analytics DBaaS
Every week we add new features and capabilities to Imply Polaris. This month, we’ve expanded security capabilities, added new query functionality, and made it easier to monitor your service with your preferred...
How to Build a Sentiment Analysis Application with ChatGPT and Druid
Leveraging ChatGPT for sentiment analysis, when combined with Apache Druid, offers results from large data volumes. This integration is easily achievable, revealing valuable insights and trends for businesses...
In this blog, we will compare Snowflake and Druid. It is important to note that reporting data warehouses and real-time analytics databases are different domains. Choosing the right tool for your specific requirements...
Learn how to achieve sub-second responses with Apache Druid
Learn how to achieve sub-second responses with Apache Druid. This article is an in-depth look at how Druid resolves queries and describes data modeling techniques that improve performance.
Apache Druid uses load rules to manage the ageing of segments from one historical tier to another and finally to purge old segments from the cluster. In this article, we’ll show what happens when you make...
Real-Time Analytics: Building Blocks and Architecture
This blog identifies the key technical considerations for real-time analytics. It answers what is the right data architecture and why. It spotlights the technologies used at Confluent, Reddit, Target and 1000s...
What’s new in Imply Polaris – Our Real-Time Analytics DBaaS
This blog explains some of the new features, functionality and connectivity added to Imply Polaris over the last two months. We've expanded ingestion capabilities, simplified operations and increased reliability...
Wow, that was easy – Up and running with Apache Druid
The objective of this blog is to provide a step-by-step guide on setting up Druid locally, including the use of SQL ingestion for importing data and executing analytical queries.
Tales at Scale Podcast Kicks off with the Apache Druid Origin Story
Tales at Scale cracks open the world of analytics projects and shares stories from developers and engineers who are building analytics applications or working within the real-time data space. One of the key...
Real-time Analytics Database uses partitioning and pruning to achieve its legendary performance
Apache Druid uses partitioning (splitting data) and pruning (selecting subset of data) to achieve its legendary performance. Learn how to use the CLUSTERED BY clause during ingestion for performance and high...
Easily embed analytics into your own apps with Imply’s DBaaS
This blog explains how developers can leverage Imply Polaris to embed robust visualization options directly into their own applications without them having to build a UI. This is super important because consuming...
Building an Event Analytics Pipeline with Confluent Cloud and Imply’s real time DBaaS, Polaris
Learn how to set up a pipeline that generates a simulated clickstream event stream and sends it to Confluent Cloud, processes the raw clickstream data using managed ksqlDB in Confluent Cloud, delivers the processed...
We are excited to announce the availability of Imply Polaris in Europe, specifically in AWS eu-central-1 region based in Frankfurt. Since its launch in March 2022, Imply Polaris, the fully managed Database-as-a-Service...
This is a what's new to Imply in Dec 2022. We’ve added two new features to Imply Polaris to make it easier for your end users to take advantage of real-time insights.
Combating financial fraud and money laundering at scale with Apache Druid
Learn how Apache Druid enables financial services firms and FinTech companies to get immediate insights from petabytes-plus data volumes for anti-fraud and anti-money laundering compliance.
Imply Pivot delivers the final mile for modern analytics applications
This blog is focused on how Imply Pivot delivers the final mile for building an anlaytics app. It showcases two customer examples - Twitch and ironsource.
For decades, analytics has been defined by the standard reporting and BI workflow, supported by the data warehouse. Now, 1000s of companies are realizing an expansion of analytics beyond reporting, which requires...
Apache Druid is at the heart of Imply. We’re an open source business, and that’s why we’re committed to making Druid the best open source database for modern analytics applications
Tales at Scale Podcast: Who Really Needs Real-Time Data?
Gwen Shapira, co-founder and CPO of Nile joins us to help define real-time data, discuss who needs it (and who probably doesn't) and how to not build yourself into a corner with your architecture. When you're...
When it comes to modern data analytics applications, speed is of the utmost importance. In this blog we discuss two approximation algorithms which can be used to greatly enhance speed with only a slight reduction...
The next chapter for Imply Polaris: celebrating 250+ accounts, continued innovation
Today we announced the next iteration of Imply Polaris, the fully managed Database-as-a-Service that helps you build modern analytics applications faster, cheaper, and with less effort. Since its launch in...
We obviously talk a lot about #ApacheDruid on here. But what are folks actually building with Druid? What is a modern analytics application, exactly? Let's find out
Elasticity is important, but beware the database that can only save you money when your application is not in use. The best solution will have excellent price-performance under all conditions.
Druid 0.23 – Features And Capabilities For Advanced Scenarios
Many of Druid’s improvements focus on building a solid foundation, including making the system more stable, easier to use, faster to scale, and better integrated with the rest of the data ecosystem. But for...
Apache Druid 0.23.0 contains over 450 updates, including new features, major performance enhancements, bug fixes, and major documentation improvements.
Imply Polaris is a fully managed database-as-a-service for building realtime analytics applications. John is the tech lead for the Polaris UI, known internally as the Unified App. It began with a profound question:...
There is a new category within data analytics emerging which is not centered in the world of reports and dashboards (the purview of data analysts and data scientists), but instead centered in the world of applications...
We are in the early stages of a stream revolution, as developers build modern transactional and analytic applications that use real-time data continuously delivered.
Developers and architects must look beyond query performance to understand the operational realities of growing and managing a high performance database and if it will consume their valuable time.
Building high performance logging analytics with Polaris and Logstash
When you think of querying with Apache Druid, you probably imagine queries over massive data sets that run in less than a second. This blog is about some of the things we did as a team to discover the user...
Horizontal scaling is the key to performance at scale, which is why every database claims this. You should investigate, though, to see how much effort it takes, especially compared to Apache Druid.
When you think of querying with Apache Druid, you probably imagine queries over massive data sets that run in less than a second. This blog is about some of the things we did as a team to discover the user...
Building Analytics for External Users is a Whole Different Animal
Analytics aren’t just for internal stakeholders anymore. If you’re building an analytics application for customers, then you’re probably wondering…what’s the right database backend?
After over 30 years of working with data analytics, we’ve been witness (and sometimes participant) to three major shifts in how we find insights from data - and now we’re looking at the fourth.
Every year industry pundits predict data and analytics becoming more valuable the following year. But this doesn’t take a crystal ball to predict. There’s instead something much more interesting happening...
Today, I'm prepared to share our progress on this effort and some of our plans for the future. But before diving further into that, let's take a closer look at how Druid's core query engine executes queries,...
Product Update: SSO, Cluster level authorization, OAuth 2.0 and more security features
When you think of querying with Apache Druid, you probably imagine queries over massive data sets that run in less than a second. This blog is about some of the things we did as a team to discover the user...
When you think of querying with Apache Druid, you probably imagine queries over massive data sets that run in less than a second. This blog is about some of the things we did as a team to discover the user...
Druid Nails Cost Efficiency Challenge Against ClickHouse & Rockset
To make a long story short, we were pleased to confirm that Druid is 2 times faster than ClickHouse and 8 times faster than Rockset with fewer hardware resources!.
Unveiling Project Shapeshift Nov. 9th at Druid Summit 2021
There is a new category within data analytics emerging which is not centered in the world of reports and dashboards (the purview of data analysts and data scientists), but instead centered in the world of applications...
How we made long-running queries work in Apache Druid
When you think of querying with Apache Druid, you probably imagine queries over massive data sets that run in less than a second. This blog is about some of the things we did as a team to discover the user...
Uneven traffic flow in streaming pipelines is a common problem. Providing the right level of resources to keep up with spikes in demand is a requirement in order to deliver timely analytics.
Community Discoveries: multi-value dimensions in Apache Druid
Hellmar Becker is an Imply solutions engineer based in Germany, where he has been delving into the nooks-and-crannies of multi-valued dimension support in Druid. In this interview, Hellmar explains why...
Community Spotlight: Apache Pulsar and Apache Druid get close…
The community team at Imply spoke with an Apache Pulsar community member, Giannis Polyzos, about how collaboration between open source communities generates great things, and more specifically, about how...
Meet the team: Abhishek Agarwal, engineering lead in India
Abhishek is Imply’s first engineer in India. We spoke to him about setting up our operations in Bangalore and asked what kind of local talent the company is looking for.
Jihoon Son is a software engineer at Imply who works on Apache Druid®. He explains what drew him to Imply five years ago and why he’s even more inspired by the company today.
Community Spotlight: Sparking that connection with Apache Druid
It’s been nearly 10 years now since Druid was open sourced “to help other organizations solve their real-time data analysis and processing needs”. This has happened not because of one person or one...
Community Spotlight: Augmented analytics on business metrics by Cuebook with Apache Druid®
Cuebook is putting you, decision-maker, back in the driving seat, powered by Apache Druid®. In this interview with their founder and CEO, we learn their reason for being, their open source Cuelake tooling,...
Empowering all types of users to analyze data incredibly quickly from wherever it sits provides huge value to organizations. Citizen data scientists and decision scientists are able to make empirically-backed,...
Our vision at Imply has always been to create a new category for data analytics, analytics-in-motion, and enable organizations to unlock workflows they’ve never been able to do before. With the most recent...
Community Spotlight: Avesta powers next-generation applications with Apache Druid
When considering various real-time analytics solutions, Apache Druid quickly became the clear choice: Avesta uses only open-source products and libraries. And today, they’re using Druid as a central component...
The traditional BI workflow starts with a strategic question. Such a question is not too time-sensitive—days or weeks is okay—and the question is pretty complex to answer.
How we enabled the “Go Fast” button on TopN queries: Hint: we used vectorized virtual columns (which is new in Apache Druid 0.20.0)
Apache Druid is a fast, modern analytics database designed for workflows where fast, ad-hoc analytics, instant data visibility, or supporting high concurrency is important. Multiple factors contribute to...
How Sift is accurately identifying anomalies in real time by using Imply Druid
As the leader in Digital Trust & Safety and a pioneer in using machine learning to fight fraud, Sift regularly deploys new machine learning models into production. Sift’s customers use the scores generated...
Making the impossible, possible: A GameAnalytics case study
We’ve had the pleasure of speaking with Ioana Hreninciuc, CEO of GameAnalytics, to learn just how they use Imply to make their next-generation data stack possible.
Make your real-time dashboards blazing fast with per-segment caching
Imagine a scenario where Druid is collecting metrics about a huge microservices application —there’s a continuous stream of metrics coming in about the different services from this application.
Community Spotlight: smart advertising from Sage+Archer + Apache Druid
Out-of-home advertising has changed. Gone are static, uncompromisingly homogenous posters, replaced instead with bright and fluid installations. Installations that make smart decisions about what and when...
Some time ago, Dana Assa and I wrote a detailed blog post about Data retention and deletion in Apache Druid. Our intention was to help Druid database users and provide guidance on how to control the TTL...
Hawk is the first independent European platform to offer a transparent and technological advertising experience across all screens: Desktop, Mobile, CTV, DOOH & Digital Audio.
If you thought you had perfect rollups before, you might have been wrong!
In Apache Druid, you can roll up duplicate rows into a single row to optimize storage and improve query performance. Rollup pre-aggregates data at ingestion time, which reduces the amount of data the query...
Imply’s real-time analytics maturity model to create better customer experiences
Imply’s real-time Druid database today powers the analytics needs of over 100 customers across industries such as Banking, Retail, Manufacturing, and Technology. We have observed that the majority of prospects...
What I wish I knew about Imply when I was developing in-house analytics
Like a lot of engineers at Imply, I got my start here after having worked on an analytics solution for a previous employer. In my case, it was a large non-tech company going through a digital transformation.
Imply allows Kueez's data analysts, content editors, and growth teams to optimize their campaigns in real-time. With open-source Druid, they struggled to keep their system up and running, their queries were...