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HDFS : never change replication factor with snapshot

BigData Cloudera Hadoop Hdfs Hortonworks
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 ?

By Eric Deleforterie 29 December 2024 0
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Running a Role handler from a playbook

Ansible
Running a Role handler from a playbook

If you are well organized you have multiple roles to manage you deployment and configuration If you know the Ansible handler power you use it to manage all the operations on your software, services and so on. It is simple to trigger a handler inside a role task, but have you ever imagined using the…

By Eric Deleforterie 29 December 2024 0
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Export Hbase tables from HDP 2.6 to CDP 7.1

Ambari BigData Cloudera Hadoop HBase Hortonworks Kerberos Yarn
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…

By Eric Deleforterie 22 February 2022 0
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Calling a loop task to filter and construct final json result in Ansible

Ansible
Calling a loop task to filter and construct final json result in Ansible

Sometimes you need to : iterate a payload call an API for each item filtering the json result using json_query returning a final result with all the filtered result With this result you can iterate for another API. This article talk about how to do that using Ansible, json_query filter

By Eric Deleforterie 25 May 2021 0
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Restoring Kerberos Master Key in OpenLdap

Kerberos OpenLdap
Restoring Kerberos Master Key in OpenLdap

One of the classic architecture when using a Kerberos KDC and OpenLdap is to store the KDC database in OpenLdap backend.You can find a procedure to do that on the MIT Kerberos documentation site The advantage of storing your KDC in OpenLdap backend is to take advantage of the OpenLdap replication process that is easy…

By Eric Deleforterie 30 April 2021 0
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Hdfs top users by actions

BigData Hadoop Hortonworks Non classé
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

By Eric Deleforterie 29 June 2020 1
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Namenode monitoring

BigData Hadoop Hortonworks
Namenode monitoring

When having trouble with your Big Data cluster, it could be interesting to automatically generate some monitoring for your namenode.

By Eric Deleforterie 19 June 2020 0
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Hive ACID activation side effect

BigData Hive
Hive ACID activation side effect

In this article, I will describe the impact of the Hive ACID activation on a running cluster HDP 2.6.4  

By Eric Deleforterie 10 August 2019 0
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Adding custom metrics in Ambari Metrics

Ambari Ambari Metrics BigData HBase Hortonworks Linux Python Zookeeper
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.

By Eric Deleforterie 10 March 2019 0
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Zookeeper 4 letters words admin commands

BigData Zookeeper
Zookeeper 4 letters words admin commands

In this article we will discover Zookeeper 4 letters commands to help us to monitor Zookeper

By Eric Deleforterie 10 March 2019 1
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Recent Posts

  • HDFS : never change replication factor with snapshot
  • Running a Role handler from a playbook
  • Export Hbase tables from HDP 2.6 to CDP 7.1
  • Calling a loop task to filter and construct final json result in Ansible
  • Restoring Kerberos Master Key in OpenLdap

Category

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    • Ranger
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    • Zookeeper
  • Linux
    • Kerberos
    • OpenLdap
    • SSL/TLS
  • Non classé
  • Python
  • Sgbd
    • Postgresql

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