No transaction No enhanced delivery modesNo enterprise queueing. By accepting this, # NSQ: golanghttp://nsq.io, easy to setupNSQ seems more flexible, and it supports message persistence and also provides NATS-like ephemeral channels for when persistence is not a hard requirement. We’re running it in production for a couple of weeks now and haven’t had any issues. Kafka runs on JVM (Scala to be specific). Kafka is completely unsuitable for RPC, for several reasons. Architecturally, that’s because NATS doesn’t have a persistence layer to use to store data durably.While Kafka does have a persistence layer (using storage on the cluster).To fully guarantee that a message won’t be lost, it looks like you need to declare the queue as durable + to mark your message as persistent + use publisher confirms.
It is incredibly simple to operate at scale.Kafka’s performance and added guarantee come at the expense of being harder to operate.With Kafka you need a Zookeeper cluster in addition to your Kafka brokers. There are a bunch of configuration parameter/knobs to tune this behavior (on the client side)Delivery semantic — NATS supports at-most once (and at-least-once with NATS streaming) as opposed to Kafka which also supports exactly-once (tough! Good for ordered logs. NSQ lacks durability and replication. # Apache Pulsar (pulsar.incubator.apache.org): JavaIt was designed at Yahoo as a high-performance, low latency, scalable, durable solution for both pub-sub messaging and message queuing. Get NSQ behavior out of Kafka but not inverse. Consequently, RabbitMQ is a more “heavyweight” queuing solution and tends to pay an additional premium with. In general, NATS and Redis are better suited to smaller messages (well below 1MB), in which latency tends to be sub-millisecond up to four nines.NATS is not HTTP, it’s its own very simple text-based protocol, RPC-like. NATS is useful when raw performance is a priority.Both NATS and NSQ queues support for per-message TTL, for pruning time-sensitive messages.
It promotes distributed and decentralized topologies without single points of failure, enabling fault tolerance and high availability coupled with a reliable message delivery guarantee. NSQ - A realtime distributed messaging platform. Kafka is designed for fast (or at least evenly performant) consumers. Kafka is just a really solid piece of engineering when you need 5–50 servers. Pulsar gives you one system for both streaming and queuing, with the same high performance, using a unified API. NATS - Lightweight publish-subscribe & distributed queueing messaging system. Unlike traditional enterprise messaging systems, NATS has an always-on dial tone that does whatever it takes to remain available. Leave us your work email ID and we'll be in touch.
# RabbitMQ: RabbitMQ is a messaging engine that follows the AMQP 0.9.1 definition of a broker. All that’s really stored is an “offset” value that specifies where in the log the consumer left off. With NSQ there is a built-in utility nsq_to_file which just becomes one additional consumer you’d use to archive each message topic to disk. And this costs several hundreds of milliseconds of latency. P1 is empty, P2 has a ton of messages. In other words: A single slow consumer can block a significant portion of the queue. Consumers listen directly on queues, but publishers only know about “exchanges.” These exchanges are linked to queues via bindings, which specify the routing paradigm (among other things). Users of NATS include Buzzfeed, Tinder, Stripe, Rakutan, Ericsson, HTC, Siemens, VMware, Pivotal, GE and Baidu among many.One use case: “We’re using NATS for synchronous communication, sending around 10k messages each second through it. It has file durability but only as a) an optimization to prevent message loss once memory runs out and b) as a consumer archive. Only one of the (potentially multiple) subscribers gets the message.
Kafka — ConsConsumer cannot acknowledge message from a different threadNo multitenancyNo robust Multi-DC replication — (offered in Confluent Enterprise)Management in a cloud environment is difficult. NATS doesn’t have replication, sharding or total ordering.
Which is a major missing feature when comparing it to Kafka. # Kafka: ScalaWith Kafka, you can do both real-time and batch processing. But a hard loss of a node means that those messages that have not been delivered can be lost as there is no promise they are published somewhere else. Cons:RabbitMQ’s high availability support is terrible. Ingest tons of data, route via publish-subscribe (or queuing). — Bhagwan s. Soni — Medium]https://medium.com/@bhagwanssoni/apache-pulsar-is-it-a-kafka-killer-a7538afedd0b, # Good benchmarking report: [Benchmarking Message Queue Latency — Brave New Geek]https://bravenewgeek.com/benchmarking-message-queue-latency/[Benchmarking NATS Streaming and Apache Kafka — DZone Performance]https://dzone.com/articles/benchmarking-nats-streaming-and-apache-kafka, https://github.com/nats-io/nats-streaming-server, https://www.rabbitmq.com/persistence-conf.html, https://bitbucket.org/hmbd/hmbdc-rel/overview, https://bitbucket.org/hmbd/hmbdc-rel/wiki/Home, http://www.hummingbirdcode.net/p/blog-page.html, https://bitbucket.org/hmbd/hmbdc-rel/src/default/perf-sample.txt?fileviewer=file-view-default, http://open.syn3.nl/syn3/trac/default/wiki/projects/synapse, https://www.reddit.com/r/cpp/comments/894y48/a_high_performance_c_14_messaging_lib_for_latency/, https://seroter.wordpress.com/2016/05/16/modern-open-source-messaging-apache-kafka-rabbitmq-and-nats-in-action/, https://www.slideshare.net/rseroter/the-open-source-messaging-landscape, https://www.quora.com/Is-NATS-IO-a-real-alternative-to-Kafka-Who-used-it-in-a-production, https://stackshare.io/stackups/kafka-vs-nsq-vs-rabbitmq, https://stackshare.io/stackups/kafka-vs-nsq, https://news.ycombinator.com/item?id=11284489, https://aphyr.com/posts/315-jepsen-rabbitmq, https://simplydistributed.wordpress.com/2018/03/30/kafka-nats-random-notes/, https://www.businesswire.com/news/home/20180306005633/en/Apache-Pulsar-Outperforms-Apache-Kafka-2.5x-OpenMessaging, https://stackoverflow.com/questions/46048608/what-are-the-advantages-and-disadvantages-of-kafka-over-apache-pulsar, https://streaml.io/blog/pulsar-streaming-queuing, https://medium.com/@bhagwanssoni/apache-pulsar-is-it-a-kafka-killer-a7538afedd0b, https://bravenewgeek.com/benchmarking-message-queue-latency/, https://dzone.com/articles/benchmarking-nats-streaming-and-apache-kafka, A Python Study: Combining Candlestick Patterns with Technical Indicators, 10 Self-Taught Programmers Who Became Full-Time Developers, Airflow Series — Setting Up for GCP Projects, How I Accidentally Fell in Love with Coding.
See features & guarantees. Get weekly alerts on business insights, acquisitions, and changes in the technology landscape. # References:  [A high performance C++ (14) messaging lib for latency sensitive software development : cpp] https://www.reddit.com/r/cpp/comments/894y48/a_high_performance_c_14_messaging_lib_for_latency/, [Modern Open Source Messaging: Apache Kafka, RabbitMQ and NATS in Action — Richard Seroter’s Architecture Musings]https://seroter.wordpress.com/2016/05/16/modern-open-source-messaging-apache-kafka-rabbitmq-and-nats-in-action/, [The Open Source Messaging Landscape]https://www.slideshare.net/rseroter/the-open-source-messaging-landscape, [Is NATS.IO a real alternative to Kafka? Pros:Slogan: always on and available, dial toneConcise designLow CPU-consumingFast: Ahigh-velocity communication busHigh availabilityHigh scalabilityLight-weight: It’s tiny, just a 3MB Docker image! http://open.syn3.nl/syn3/trac/default/wiki/projects/synapseBy checking https://github.com/psy0rz/Synapse, I doubt this project is out of dated (3 years ago). Pulsar — ProsFeature rich — persistent/nonpersistent topics, multitenancy, ACLs, Multi-DC replication etc.More flexible client API that is easier to use — including CompletableFutures, fluent interfaces etc.Java client components are thread-safe — a consumer can acknowledge messages from different threads. To sum up, Kafka aims for high throughput, Pulsar for low latency. — look at the dominance of Golang here!
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