Quick Answer: What Are Kafka Logs?

How can I tell if Kafka is running Windows?

I would say that another easy option to check if a Kafka server is running is to create a simple KafkaConsumer pointing to the cluste and try some action, for example, listTopics().

If kafka server is not running, you will get a TimeoutException and then you can use a try-catch sentence..

How do I view Kafka logs?

If you open script kafka-server-start or /usr/bin/zookeeper-server-start , you will see at the bottom that it calls kafka-run-class script. And you will see there that it uses LOG_DIR as the folder for the logs of the service (not to be confused with kafka topics data).

What is Kafka and why it is used?

Kafka is a distributed streaming platform that is used publish and subscribe to streams of records. Kafka is used for fault tolerant storage. Kafka replicates topic log partitions to multiple servers. … Kafka is used to stream data into data lakes, applications, and real-time stream analytics systems.

How long does Kafka keep data?

The Kafka cluster retains all published messages—whether or not they have been consumed—for a configurable period of time. For example if the log retention is set to two days, then for the two days after a message is published it is available for consumption, after which it will be discarded to free up space.

Where is Kafka data stored?

dir in server. properties is the place where the Kafka broker will store the commit logs containing your data. Typically this will your high speed mount disk for mission critical use-cases.

Where Kafka offset is stored?

The offsets for your groups are stored in zookeeper. For brokers 0.9 and higher you should use the new ConsumerGroup . The offsets are stored with kafka brokers.

What is Kafka not good for?

Kafka is not designed to be a task queue. There are other tools that are better for such use cases, for example, RabbitMQ. If you need a database, use a database, not Kafka. Kafka is not good for long-term storage.

Is Kafka a data lake?

Building a modern data lake A modern data lake solution that uses Apache Kafka, or a fully managed Apache Kafka service like Confluent Cloud, allows organizations to use the wealth of existing data in their on-premises data lake while moving that data to the cloud.

Does Kafka store data?

The answer is no, there’s nothing crazy about storing data in Kafka: it works well for this because it was designed to do it. Data in Kafka is persisted to disk, checksummed, and replicated for fault tolerance. Accumulating more stored data doesn’t make it slower.

What is log compaction in Kafka?

Kafka documentation says: Log compaction is a mechanism to give finer-grained per-record retention, rather than the coarser-grained time-based retention. The idea is to selectively remove records where we have a more recent update with the same primary key.

Can I use Kafka as database?

The main idea behind Kafka is to continuously process streaming data; with additional options to query stored data. Kafka is good enough as database for some use cases. However, the query capabilities of Kafka are not good enough for some other use cases.

What makes Kafka so fast?

Kafka uses many other techniques apart from the ones mentioned above to make systems much faster and efficient: Batching of data to reduce network calls, and also converting a lot of random writes into sequential ones. Compression of batches (and not individual messages) using LZ4, SNAPPY or GZIP codecs.