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Kafka vs VerneMQ: What are the differences?
Developers describe Kafka as "Distributed, fault tolerant, high throughput pub-sub messaging system". Kafka is a distributed, partitioned, replicated commit log service. It provides the functionality of a messaging system, but with a unique design. On the other hand, VerneMQ is detailed as "VerneMQ is a distributed IoT/MQTT message broker". VerneMQ is a distributed MQTT message broker, implemented in Erlang/OTP It's open source, and Apache 2 licensed. VerneMQ implements the MQTT 3.1, 3.1.1 and 5.0 specifications..
Kafka and VerneMQ can be categorized as "Message Queue" tools.
Some of the features offered by Kafka are:
- Written at LinkedIn in Scala
- Used by LinkedIn to offload processing of all page and other views
- Defaults to using persistence, uses OS disk cache for hot data (has higher throughput then any of the above having persistence enabled)
On the other hand, VerneMQ provides the following key features:
- Open Source, Apache 2 licensed
- QoS 0, QoS 1, QoS 2
- MQTT v5.0 fully implemented
Kafka and VerneMQ are both open source tools. It seems that Kafka with 12.7K GitHub stars and 6.81K forks on GitHub has more adoption than VerneMQ with 1.76K GitHub stars and 189 GitHub forks.
Pros of Kafka
- High-throughput125
- Distributed119
- Scalable89
- High-Performance83
- Durable65
- Publish-Subscribe37
- Simple-to-use19
- Open source17
- Written in Scala and java. Runs on JVM11
- Message broker + Streaming system8
- Avro schema integration4
- Robust4
- KSQL4
- Suport Multiple clients2
- Partioned, replayable log2
- Flexible1
- Extremely good parallelism constructs1
- Simple publisher / multi-subscriber model1
- Fun1
Pros of VerneMQ
- Fully open source clustering1
- Proxy Protocol support1
- Open Source Plugin System1
- Open Source Message and Metadata Persistence1
- MQTT v5 implementation1
- Open source shared subscriptions1
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Cons of Kafka
- Non-Java clients are second-class citizens29
- Needs Zookeeper27
- Operational difficulties7
- Terrible Packaging2