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Kafka VS Apache Flink

Compare Kafka VS Apache Flink and see what are their differences

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Kafka logo Kafka

Apache Kafka is publish-subscribe messaging rethought as a distributed commit log.

Apache Flink logo Apache Flink

Flink is a streaming dataflow engine that provides data distribution, communication, and fault tolerance for distributed computations.
  • Kafka Landing page
    Landing page //
    2022-12-24
  • Apache Flink Landing page
    Landing page //
    2023-10-03

Kafka features and specs

  • High Throughput
    Apache Kafka is capable of handling a large volume of data with very low latency, making it ideal for real-time data processing applications.
  • Scalability
    Kafka can effortlessly scale out by adding more brokers to a cluster, allowing it to handle increased data loads.
  • Fault Tolerance
    Kafka offers built-in replication and fault tolerance, ensuring that data is not lost even if some brokers or nodes fail.
  • Durability
    Messages in Kafka are persistently stored on disk, providing durability and data recovery capabilities in case of failures.
  • Stream Processing
    Kafka, along with Kafka Streams, offers powerful stream processing capabilities, allowing real-time data transformation and processing.
  • Ecosystem
    Kafka has a rich ecosystem that includes Kafka Connect for data integration, Kafka Streams for stream processing, and many other tools that make it easier to work with data.
  • Language Support
    Kafka clients are available in multiple programming languages, providing flexibility in choosing the technology stack for your project.

Possible disadvantages of Kafka

  • Complexity
    Setting up and managing a Kafka cluster can be complex, requiring expertise in distributed systems and careful configuration.
  • Resource Intensive
    Kafka can be resource-intensive, requiring significant memory and CPU resources, especially at scale.
  • Operational Overhead
    Maintaining Kafka clusters involves considerable operational overhead, including monitoring, tuning, and managing brokers and partitions.
  • Data Ordering
    While Kafka guarantees ordering within a partition, maintaining total order across a topic with multiple partitions can be challenging.
  • Latency
    In certain use-cases, such as strict low-latency requirements, Kafka’s design might introduce higher latency as compared to some specialized messaging systems.
  • Learning Curve
    Kafka has a steep learning curve, which might make it harder for new developers to get started quickly.
  • Data Storage
    Despite Kafka’s durability features, large volumes of data storage can become costly and need careful management to avoid sluggish performance.

Apache Flink features and specs

  • Real-time Stream Processing
    Apache Flink is designed for real-time data streaming, offering low-latency processing capabilities that are essential for applications requiring immediate data insights.
  • Event Time Processing
    Flink supports event time processing, which allows it to handle out-of-order events effectively and provide accurate results based on the time events actually occurred rather than when they were processed.
  • State Management
    Flink provides robust state management features, making it easier to maintain and query state across distributed nodes, which is crucial for managing long-running applications.
  • Fault Tolerance
    The framework includes built-in mechanisms for fault tolerance, such as consistent checkpoints and savepoints, ensuring high reliability and data consistency even in the case of failures.
  • Scalability
    Apache Flink is highly scalable, capable of handling both batch and stream processing workloads across a distributed cluster, making it suitable for large-scale data processing tasks.
  • Rich Ecosystem
    Flink has a rich set of APIs and integrations with other big data tools, such as Apache Kafka, Apache Hadoop, and Apache Cassandra, enhancing its versatility and ease of integration into existing data pipelines.

Possible disadvantages of Apache Flink

  • Complexity
    Flink’s advanced features and capabilities come with a steep learning curve, making it more challenging to set up and use compared to simpler stream processing frameworks.
  • Resource Intensive
    The framework can be resource-intensive, requiring substantial memory and CPU resources for optimal performance, which might be a concern for smaller setups or cost-sensitive environments.
  • Community Support
    While growing, the community around Apache Flink is not as large or mature as some other big data frameworks like Apache Spark, potentially limiting the availability of community-contributed resources and support.
  • Ecosystem Maturity
    Despite its integrations, the Flink ecosystem is still maturing, and certain tools and plugins may not be as developed or stable as those available for more established frameworks.
  • Operational Overhead
    Running and maintaining a Flink cluster can involve significant operational overhead, including monitoring, scaling, and troubleshooting, which might require a dedicated team or additional expertise.

Analysis of Kafka

Overall verdict

  • Yes, Kafka is often considered a good choice for organizations needing robust, scalable, and fault-tolerant solutions for handling streaming data and real-time analytics. Its widespread adoption and active open-source community provide a wealth of resources and support for users.

Why this product is good

  • Apache Kafka is renowned for its high-throughput, low-latency platform for handling real-time data feeds. It excels in use cases like real-time data processing, event sourcing, and log aggregation due to its scalability, fault tolerance, and ability to handle large volumes of data with minimal delay. Kafka's distributed architecture allows it to maintain a high degree of availability and fault-tolerance, making it ideal for mission-critical applications.

Recommended for

  • Organizations requiring real-time data processing capabilities
  • Businesses seeking a reliable and scalable event streaming platform
  • Developers implementing event-driven architectures
  • Companies needing to perform log aggregation and real-time monitoring
  • Teams focusing on building systems with fault tolerance and high availability

Analysis of Apache Flink

Overall verdict

  • Yes, Apache Flink is considered a good distributed stream processing framework.

Why this product is good

  • Rich api
    Flink offers a rich set of APIs for various levels of abstraction, catering to different needs of developers.
  • Scalability
    Flink provides excellent horizontal scalability, making it suitable for handling large data streams and high-throughput applications.
  • Fault tolerance
    Flink's checkpointing mechanism ensures fault-tolerance, maintaining data state consistency even after failures.
  • Ease of integration
    Flink integrates well with other big data tools and ecosystems, facilitating broader data architecture designs.
  • Real-time processing
    It excels at processing data in real-time, allowing for immediate insights and action on streaming data.
  • Community and support
    Being a part of the Apache Software Foundation, Flink benefits from a large community and comprehensive documentation.
  • Complex event processing
    It supports complex event processing, which is essential for many real-time applications.

Recommended for

  • real-time analytics
  • stream data processing
  • complex event processing
  • machine learning in streaming applications
  • applications requiring high-throughput and low-latency processing
  • companies looking for robust fault-tolerance in distributed systems

Kafka videos

Franz Kafka - In The Penal Colony BOOK REVIEW

More videos:

  • Review - LITERATURE: Franz Kafka
  • Review - The Trial (Franz Kafka) – Thug Notes Summary & Analysis

Apache Flink videos

GOTO 2019 • Introduction to Stateful Stream Processing with Apache Flink • Robert Metzger

More videos:

  • Tutorial - Apache Flink Tutorial | Flink vs Spark | Real Time Analytics Using Flink | Apache Flink Training
  • Tutorial - How to build a modern stream processor: The science behind Apache Flink - Stefan Richter

Category Popularity

0-100% (relative to Kafka and Apache Flink)
Log Management
100 100%
0% 0
Big Data
0 0%
100% 100
Backend Development
100 100%
0% 0
Stream Processing
0 0%
100% 100

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Kafka and Apache Flink

Kafka Reviews

6 Best Kafka Alternatives: 2022’s Must-know List
In this article, you learned about Kafka, its features, and some top Kafka Alternatives. Even though Kafka is widely used, the technology segment has advanced to the point where other options can overshadow Kafka’s cons. There are various options available for choosing a stream processing solution. Organizations are increasingly embracing event-driven architectures powered...
Source: hevodata.com

Apache Flink Reviews

We have no reviews of Apache Flink yet.
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Social recommendations and mentions

Based on our record, Apache Flink seems to be more popular. It has been mentiond 41 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Kafka mentions (0)

We have not tracked any mentions of Kafka yet. Tracking of Kafka recommendations started around Mar 2021.

Apache Flink mentions (41)

  • What is Apache Flink? Exploring Its Open Source Business Model, Funding, and Community
    Continuous Learning: Leverage online tutorials from the official Flink website and attend webinars for deeper insights. - Source: dev.to / about 1 month ago
  • Is RisingWave the Next Apache Flink?
    Apache Flink, known initially as Stratosphere, is a distributed stream processing engine initiated by a group of researchers at TU Berlin. Since its initial release in May 2011, Flink has gained immense popularity in both academia and industry. And it is currently the most well-known streaming system globally (challenge me if you think I got it wrong!). - Source: dev.to / about 2 months ago
  • Every Database Will Support Iceberg — Here's Why
    Apache Iceberg defines a table format that separates how data is stored from how data is queried. Any engine that implements the Iceberg integration — Spark, Flink, Trino, DuckDB, Snowflake, RisingWave — can read and/or write Iceberg data directly. - Source: dev.to / about 2 months ago
  • RisingWave Turns Four: Our Journey Beyond Democratizing Stream Processing
    The last decade saw the rise of open-source frameworks like Apache Flink, Spark Streaming, and Apache Samza. These offered more flexibility but still demanded significant engineering muscle to run effectively at scale. Companies using them often needed specialized stream processing engineers just to manage internal state, tune performance, and handle the day-to-day operational challenges. The barrier to entry... - Source: dev.to / about 2 months ago
  • Twitter's 600-Tweet Daily Limit Crisis: Soaring GCP Costs and the Open Source Fix Elon Musk Ignored
    Apache Flink: Flink is a unified streaming and batching platform developed under the Apache Foundation. It provides support for Java API and a SQL interface. Flink boasts a large ecosystem and can seamlessly integrate with various services, including Kafka, Pulsar, HDFS, Iceberg, Hudi, and other systems. - Source: dev.to / 2 months ago
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What are some alternatives?

When comparing Kafka and Apache Flink, you can also consider the following products

Raygun - Raygun gives developers meaningful insights into problems affecting their applications. Discover issues - Understand the problem - Fix things faster.

Apache Spark - Apache Spark is an engine for big data processing, with built-in modules for streaming, SQL, machine learning and graph processing.

Sentry.io - From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.

Spring Framework - The Spring Framework provides a comprehensive programming and configuration model for modern Java-based enterprise applications - on any kind of deployment platform.

Snare - Snare is well known historically as a leader in the event log space.

Amazon Kinesis - Amazon Kinesis services make it easy to work with real-time streaming data in the AWS cloud.