Hi @badr bakkou, can you please check the ambari version(both server and agents) which you have chosen, it must be of 2.5.1, at the same time please ensure that you have the appropriate management pack as well (compatible version mentioned below.) please find the compatible matrix here Hope that helps !! ... View more

Hi @uri ben-ari, Yes, thats possible provided following : Partitions : Increase the partitions will keep the data in different log files which also gives the benefit of increased parallelism along with reducing the log file size(increases the number of files) at the same this will not reduce the data volume in disk, but split into multiple files. Prcedure to increase the partition : # Add new option or change exsiting option bin/kafka-configs.sh --alter --zookeeper <Zookeeper_server>:2181 --entity-name <topicName> --entity-type topics --add-config cleanup.policy=compact and then ensure that Partition reassignment script executed with --execute option bin/kafka-reassign-partitions.sh more on these utilities with syntax and examples can be found here Data Retention : If you don't need to hold the data, that can be purged after reached the retention this can be set while the topic creation time with the --config option retention.bytes or retention.ms #Example bin/kafka-configs.sh --zookeeper <zookeeper_server>:2181 --entity-type topics --alter --add-config retention.ms=86400000 --entity-name <topic_name> Hope this helps!! ... View more

Hi @Gulshan Agivetova, To remove the zookeeper service from the cluster, the simple method is to use the REST API and have the zookeeper service restarted. Command to remove the service: curl -i -u admin:admin -H "X-Requested-By: ambari" -X DELETE http://<ambari-Server>:<ambari-port>/api/v1/clusters/<cluster-name>/hosts/<fully_qualified_host_name(to_be_removed)>/host_components/ZOOKEEPER_SERVER I presume, at least other hosts are alive in zookeeper quorum(to retain the data). On the other Note, it is always good to have odd number of zookeeper nodes in cluster, hence you can add a new zookeeper server by doing Go to Hosts in Ambari -> select the new node to be installed with zookeeper Server -> click on Components Add+ -> select Zookeeper Server and install.(same for ZOOKEEPER_CLIENT) Hope this helps! ... View more