HDFS : never change replication factor with snapshot
You use hdfs and for some reasons you want to change replication factor from 3 to 2 for a specific directory ?
Export Hbase tables from HDP 2.6 to CDP 7.1
In this post I will describe my journey during a migration from Hortonworks HDP 2.6 to Cloudera CDP 7.1. I have to export the Hbase tables from an old and less secure cluster to a more recent and secure cluster. The application that used the Hbase tables can’t stop for a long time and have…
Hdfs top users by actions
Sometimes it could be difficult to identifying the activities that are stressing your namenodes. Following is an article on how to have the top users by hdfs actions on your HDFS Cluster requesting the Namenode JMX
Namenode monitoring
When having trouble with your Big Data cluster, it could be interesting to automatically generate some monitoring for your namenode.
Adding custom metrics in Ambari Metrics
In this article I will show you how to add custom metrics in the Hortonworks Ambari Metrics for following Zookeeper health with Grafana.
BigData – My BigDataApi
I have updated my python Api for managing Hortonworks Ambari and Ranger with their API.
