Question: Why Does Kafka Use Zookeeper?

Does Kafka still need ZooKeeper?

For the latest version (2.4.

1) ZooKeeper is still required for running Kafka, but in the near future, ZooKeeper dependency will be removed from Apache Kafka.

See the high-level discussion in KIP-500: Replace ZooKeeper with a Self-Managed Metadata Quorum..

Why is Kafka faster than RabbitMQ?

Kafka offers much higher performance than message brokers like RabbitMQ. It uses sequential disk I/O to boost performance, making it a suitable option for implementing queues. It can achieve high throughput (millions of messages per second) with limited resources, a necessity for big data use cases.

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.

Is ZooKeeper a database?

A large cluster of NoSQL databases is an unwieldy thing to manage. Apache Zookeeper to the rescue! Keeping track of which nodes are in the cluster, what data each is managing, and ensuring that new masters are selected when a master fails aren’t easy tasks.

Why does Kafka need ZooKeeper?

Zookeeper keeps track of status of the Kafka cluster nodes and it also keeps track of Kafka topics, partitions etc. Zookeeper it self is allowing multiple clients to perform simultaneous reads and writes and acts as a shared configuration service within the system.

What is the difference between zookeeper and Kafka?

Kafka uses Zookeeper to manage service discovery for Kafka Brokers that form the cluster. Zookeeper sends changes of the topology to Kafka, so each node in the cluster knows when a new broker joined, a Broker died, a topic was removed or a topic was added, etc.

How does Kafka internally work?

recall that kafka uses zookeeper to form kafka brokers into a cluster and each node in kafka cluster is called a kafka broker. topic partitions can be replicated across multiple nodes for failover. … if one kafka broker goes down, then the kafka broker which is an isr (in-sync replica) can serve data.

What is ZooKeeper in big data?

Apache Zookeeper is a coordination service for distributed application that enables synchronization across a cluster. Zookeeper in Hadoop can be viewed as centralized repository where distributed applications can put data and get data out of it.

How do I know if zookeeper is running?

Zookeeper process runs on infra VM’s. … To start the zookeeper service use command: /usr/share/zookeeper/bin/zkServer.sh start.To check whether process is running: ps -ef | grep zookeeper.Errorlogs can be checked in Infra nodes: /var/log/zookeeper/zookeeper.log. … Check the free memory: free -mh.More items…•

Can I run Kafka on Windows?

These are the steps to install Kafka on Windows: Before you start installing Kafka, you need to install Zookeeper. Once it is download, extract the files and copy the kafka folder in C drive. … Shift+Right click on the Kafka folder and open it using command prompt or powershell.

What happens if ZooKeeper goes down in Kafka?

For example, if you lost the Kafka data in ZooKeeper, the mapping of replicas to Brokers and topic configurations would be lost as well, making your Kafka cluster no longer functional and potentially resulting in total data loss.

How do you stop Kafka ZooKeeper?

Go to the bin directory. Start ZooKeeper by executing the command ./zkServer.sh start . Stop ZooKeeper by stopping the command ./zkServer.sh stop .

Who uses ZooKeeper?

Apache ZooKeeper is used for maintaining centralized configuration information, naming, providing distributed synchronization, and providing group services in a simple interface so that we don’t have to write it from scratch. Apache Kafka also uses ZooKeeper to manage configuration.

Why Kafka is used?

In short, Kafka is used for stream processing, website activity tracking, metrics collection and monitoring, log aggregation, real-time analytics, CEP, ingesting data into Spark, ingesting data into Hadoop, CQRS, replay messages, error recovery, and guaranteed distributed commit log for in-memory computing ( …

How can I tell if Kafka server is running?

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.