Quick Answer: How Do You Check Kafka Retention Period?

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..

What does retain data mean?

records retentionData retention, also called records retention, is the continued storage of an organization’s data for compliance or business reasons. An organization may retain data for several different reasons. … Such a policy is simply a set of guidelines that describes which data will be archived and how long it will be kept.

Can Kafka replace database?

Kafka as Query Engine and its Limitations Therefore, Kafka will not replace other databases. … 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.

Where Kafka messages are stored?

Segment logs are where messages are stored The data format on disk is exactly the same as what the broker receives from the producer over the network and sends to its consumers. This allows Kafka to efficiently transfer data with zero copy.

Does Kafka need a database?

Kafka persists data, Kafka can process and transform data with the Kafka Streams API and KSQL too. Sometimes you need a database; but not always.

How do you change the retention period in Kafka?

To change this per topic, you have to go to the specific Topic you want to set infinite retention and modify it by setting the Retention (hours) to -1. Retention can also be done at a broker level, in the advanced configuration by setting the retention period to -1, kafka.

What is log retention policy?

POLICY STATEMENT Central IT retains these records or logs for a time period specified in the Retention Guidelines for Log Files. All logs are considered to be confidential and protected data, and central IT takes active measures to prevent unauthorized access during the retention period.

What is log retention period?

Log retention is based on the timestamp of the event; any event older than your retention period will be removed from our servers. More information on timestamps is available. To retain logs beyond the maximum retention period, you should archive your logs.

How long should you keep security logs?

one yearWhile most logs are covered by some form of regulation these days and should be kept as long as the requirements call for, any that are not should be kept for a minimum period of one year, in case they are needed for an investigation.

Is Kafka pull or push?

With Kafka consumers pull data from brokers. Other systems brokers push data or stream data to consumers. … Since Kafka is pull-based, it implements aggressive batching of data. Kafka like many pull based systems implements a long poll (SQS, Kafka both do).

Can Kafka store data?

Kafka can be used for storing data. … Kafka, as an event streaming platform, works with streaming data. At the same time, Kafka can store data for some time before removing it. This means that Kafka is different from traditional message queues that drop messages as soon as they are read by the consumer.

How do I stream data to Kafka?

This quick start follows these steps:Start a Kafka cluster on a single machine.Write example input data to a Kafka topic, using the so-called console producer included in Kafka.Process the input data with a Java application that uses the Kafka Streams library.More items…

What is retention period in Kafka?

A message sent to a Kafka cluster is appended to the end of one of the logs. The message remains in the topic for a configurable period of time or until a configurable size is reached until the specified retention for the topic is exceeded. The message stays in the log even if the message has been consumed.

What is the default retention period for a Kafka topic?

168 hoursThe default retention time is 168 hours, i.e. 7 days. So, you have to change the retention time to 1 second, after which the messages from the topic will be deleted.

Why Kafka is so fast?

Kafka relies on the filesystem for the storage and caching. The problem is disks are slower than RAM. This is because the seek-time through a disk is large compared to the time required for actually reading the data. But if you can avoid seeking, then you can achieve latencies as low as RAM in some cases.