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Apache Drill vs Druid: What are the differences?

Introduction

In the world of big data processing, Apache Drill and Druid are two popular open source data storage and analytics platforms. While both serve the purpose of data querying and analysis, they have distinct differences that set them apart from each other. Below are the key differences between Apache Drill and Druid in terms of functionality and architecture.

  1. Data Source Flexibility: Apache Drill offers a more flexible approach to data sources as it can seamlessly interact with various file systems, including Hadoop Distributed File System (HDFS), NoSQL databases, relational databases, and cloud storage systems like Amazon S3. On the other hand, Druid is primarily designed for real-time data ingestion and analytics, focusing on streaming data sources and time-series data, making it ideal for use cases that demand low-latency querying and high ingestion rates.

  2. Query Language Support: Apache Drill leverages SQL as its primary query language, allowing users to write SQL queries to analyze and retrieve data. It also supports NoSQL query languages like MongoDB's query syntax. In contrast, Druid uses a time-series-specific query language called Druid Query Language (DQL), which is optimized for real-time analytics on time-series data. DQL provides advanced features like granularity control and aggregations tailored for time-series analysis.

  3. Scalability and Data Partitioning: Apache Drill employs a distributed architecture that enables it to scale horizontally across multiple nodes, offering high scalability for large datasets. It leverages data partitioning techniques to parallelize queries across the cluster and optimize query performance. Druid, on the other hand, is built with a distributed, column-oriented architecture that excels in handling massive amounts of time-series data. It partitions the data based on time intervals, allowing for efficient storage and querying of time-based data.

  4. Data Model: Apache Drill provides a schema-on-read approach, meaning it does not enforce a strict schema on the ingested data. It can process semi-structured and unstructured data in a flexible manner, allowing users to explore and query various data formats without predefined schemas. In contrast, Druid follows a schema-on-write model and requires a predefined schema to be defined before ingestion. It expects the data to conform to a specific schema for efficient storage and optimized query performance.

  5. Query Performance: Apache Drill is designed for on-the-fly data exploration and querying, supporting ad-hoc queries and interactive analysis. It provides sub-second query response times for most use cases. Druid, on the other hand, excels at real-time analytics on large, time-series datasets. It optimizes for high-speed ingestion and query execution, enabling sub-second query latencies even on massive datasets. This makes it suitable for applications that require real-time, low-latency analytics.

  6. Use Cases: Due to its versatility and support for various data sources, Apache Drill finds application in scenarios where data integration across disparate sources is required, giving users the ability to query data from multiple platforms with a common interface. Druid, on the other hand, is best suited for use cases involving real-time data ingestion and analytics, such as monitoring, anomaly detection, and event-driven applications where low-latency querying and high-speed ingestion are critical.

In summary, while both Apache Drill and Druid provide data querying and analytics capabilities, their key differences lie in data source flexibility, query language support, scalability and data partitioning, data model, query performance, and use case suitability.

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Pros of Apache Drill
Pros of Druid
  • 4
    NoSQL and Hadoop
  • 3
    Free
  • 3
    Lightning speed and simplicity in face of data jungle
  • 2
    Well documented for fast install
  • 1
    SQL interface to multiple datasources
  • 1
    Nested Data support
  • 1
    Read Structured and unstructured data
  • 1
    V1.10 released - https://drill.apache.org/
  • 15
    Real Time Aggregations
  • 6
    Batch and Real-Time Ingestion
  • 5
    OLAP
  • 3
    OLAP + OLTP
  • 2
    Combining stream and historical analytics
  • 1
    OLTP

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Cons of Apache Drill
Cons of Druid
    Be the first to leave a con
    • 3
      Limited sql support
    • 2
      Joins are not supported well
    • 1
      Complexity

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    What is Apache Drill?

    Apache Drill is a distributed MPP query layer that supports SQL and alternative query languages against NoSQL and Hadoop data storage systems. It was inspired in part by Google's Dremel.

    What is Druid?

    Druid is a distributed, column-oriented, real-time analytics data store that is commonly used to power exploratory dashboards in multi-tenant environments. Druid excels as a data warehousing solution for fast aggregate queries on petabyte sized data sets. Druid supports a variety of flexible filters, exact calculations, approximate algorithms, and other useful calculations.

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    What tools integrate with Apache Drill?
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    Blog Posts

    Dec 22 2021 at 5:41AM

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