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Fluentd VS rsyslog

Compare Fluentd VS rsyslog and see what are their differences

Fluentd logo Fluentd

Fluentd is a cross platform open source data collection solution originally developed at Treasure Data.

rsyslog logo rsyslog

Rsyslog is an enhanced syslogd supporting, among others, MySQL, PostgreSQL, failover log...
  • Fluentd Landing page
    Landing page //
    2018-09-30
  • rsyslog Landing page
    Landing page //
    2023-10-01

Fluentd features and specs

  • Open Source
    Fluentd is an open-source data collector, meaning it is free to use and has a large community of contributors and users who can provide support and plugins.
  • Unified Logging Layer
    It provides a unified logging layer that can collect, filter, and distribute logs from various sources to various destinations, simplifying log management.
  • Extensibility
    Fluentd supports a wide range of plugins for inputs, outputs, filters, and parsers, making it highly extensible and customizable to fit specific needs.
  • High Performance
    It is designed to be high-performance and can handle large volumes of logs efficiently, which is crucial for enterprise environments.
  • Flexible Configuration
    Fluentd offers flexible and straightforward configuration, allowing users to define complex data pipelines with relative ease.
  • Support for Multiple Environments
    Fluentd supports cloud, on-premises, and hybrid environments, making it versatile for various deployment scenarios.

Possible disadvantages of Fluentd

  • Complexity
    The flexibility and extensibility of Fluentd can introduce complexity, requiring a steep learning curve for new users to master the tool.
  • Resource Intensive
    Fluentd can be resource-intensive, especially when dealing with large volumes of data, which may require robust infrastructure.
  • Plugin Compatibility
    While there are many plugins available, not all of them are always up-to-date or compatible with the latest versions of Fluentd, potentially causing integration issues.
  • Maintenance Overhead
    Managing Fluentd involves continuous monitoring, updating, and maintenance to ensure optimal performance and security, which could be resource-draining.
  • Documentation Gaps
    Although there is extensive documentation, some users report that it lacks deep insights and examples for advanced configurations, requiring additional research and community support.

rsyslog features and specs

  • High Performance
    Rsyslog is designed for high performance, capable of processing thousands of messages per second and efficiently handling large volumes of log data.
  • Modular Architecture
    Its modular architecture allows for the addition of various plugins and modules to extend functionality and customize the logging system as needed.
  • Advanced Filtering
    Rsyslog offers advanced filtering capabilities, using both simple and complex filters to fine-tune which logs are collected and where they are sent.
  • Network Support
    It has strong support for remote logging via protocols such as TCP, UDP, and RELP, making it a robust solution for centralized logging.
  • Reliability
    Features such as disk-assisted queues and failover actions ensure that log messages are not lost, improving overall reliability.
  • Compatibility
    Rsyslog is compatible with existing syslog implementations and can drop-in replace older syslog daemons without significant changes.
  • Open Source
    Being open-source software, it is freely available for use and modification, supported by an active community.

Possible disadvantages of rsyslog

  • Complex Configuration
    The configuration syntax of rsyslog can be complex and unintuitive, requiring a steep learning curve for beginners.
  • Documentation Quality
    While comprehensive, the documentation can sometimes be difficult to navigate and understand, which might pose challenges for new users.
  • Resource Consumption
    Although efficient, rsyslog can be resource-intensive in certain configurations, potentially impacting system performance if not properly optimized.
  • Dependency Management
    Managing dependencies for various modules and plugins can be cumbersome and may require additional effort to ensure compatibility.
  • Version Inconsistency
    Different distributions might include various versions of rsyslog, leading to inconsistencies in features and behaviors across environments.

Fluentd videos

How-to Ship Logs to Grafana Loki with Promtail, FluentD & Fluent-bit

More videos:

  • Review - OpenShift Commons Briefing #72: Cloud Native Logging with Fluentd
  • Review - Fluentd, the Open Source Data Collection tool

rsyslog videos

[LINUX] #11 Rsyslog Server Log Analyzer e Mysql

More videos:

  • Review - Ubuntu: How can I configure logrotate without having `/etc/logrotate.d/rsyslog`?

Category Popularity

0-100% (relative to Fluentd and rsyslog)
Monitoring Tools
62 62%
38% 38
Log Management
67 67%
33% 33
Security & Privacy
51 51%
49% 49
Performance Monitoring
100 100%
0% 0

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Fluentd and rsyslog

Fluentd Reviews

11 Best Splunk Alternatives
The CloudFront-log plugin, for example, can be used to ingest logs from Amazon CloudFront, while the elasticsearch plugin can be used to route logs to Elasticsearch. Fluentd only provides ingestion and routing services, so you'll have to develop your log management solution from the ground up. Fluentd has become a popular alternative to Logstash, transforming ELK into EFK....
Top 15 Kafka Alternatives Popular In 2021
Inputs and outputs have inbuilt support to buffer, load balance, timeout and retry instances. It has a unified logging layer in between the data sources. There are over 5000+ companies that rely on Fluentd and approximately collect logs from over 50000+ servers. It scraps logs from sources and sends them across to services like object storage, Elasticsearch, etc. it is...
Best Log Management Tools: Useful Tools for Log Management, Monitoring, Analytics, and More
Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Fluentd helps you unify your logging infrastructure. Fluentd’s flagship feature is an extensive library of plugins which provide extended support and functionality for anything related to log and data management within a concise developer environment.
Source: stackify.com

rsyslog Reviews

Best Log Management Tools: Useful Tools for Log Management, Monitoring, Analytics, and More
Rsyslog is a blazing-fast system built for log processing. It offers great performance benchmarks, tight security features, and a modular design for custom modifications. Rsyslog has grown from a singular logging system to be able to parse and sort logs from an extended range of sources, which it can then transform and provide an output to be used in dedicated log analysis...
Source: stackify.com

What are some alternatives?

When comparing Fluentd and rsyslog, you can also consider the following products

logstash - logstash is a tool for managing events and logs.

Graylog - Graylog is an open source log management platform for collecting, indexing, and analyzing both structured and unstructured data.

Wazuh - Open Source Host and Endpoint Security

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.

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

Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.