Quick Answer: Why Is Zookeeper Needed For Kafka?

Can Kafka lose messages?

Kafka is speedy and fault-tolerant distributed streaming platform.

However, there are some situations when messages can disappear.

It can happen due to misconfiguration or misunderstanding Kafka’s internals..

Is Kafka memory?

Kafka avoids Random Access Memory, it achieves low latency message delivery through Sequential I/O and Zero Copy Principle. Sequential I/O: Kafka relies heavily on the filesystem for storing and caching messages. There is a general perception that “disks are slow”, which means high seek time.

Kafka is easy to set up and use, and it is easy to figure out how Kafka works. However, the main reason Kafka is very popular is its excellent performance. … In addition, Kafka works well with systems that have data streams to process and enables those systems to aggregate, transform, and load into other stores.

Does Kafka client need to connect to zookeeper?

First of all, zookeeper is needed only for high level consumer. SimpleConsumer does not require zookeeper to work. The main reason zookeeper is needed for a high level consumer is to track consumed offsets and handle load balancing. … Here’s where zookeeper kicks in: it stores offsets for every group/topic/partition.

Does Kafka still need ZooKeeper?

0) ZooKeeper is still required for running Kafka, but in the near future ZooKeeper will be replaced with a Self-Managed Metadata Quorum. See details in the accepted KIP-500. Kafka uses ZooKeeper to store its metadata about partitions and brokers, and to elect a broker to be the Kafka Controller.

What is the relationship between Kafka and ZooKeeper?

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.

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.

What is the role of ZooKeeper?

ZooKeeper is an open source Apache project that provides a centralized service for providing configuration information, naming, synchronization and group services over large clusters in distributed systems.

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.

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.

How many messages can Kafka handle?

Aiven Kafka Premium-8 on UpCloud handled 535,000 messages per second, Azure 400,000, Google 330,000 and Amazon 280,000 messages / second.

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.