Categories
SysOps

How to create Yarn nodes whitelist

Create Yarn nodes whitelist.

Categories
SysOps

How to save namespace and perform checkpoint

Save namespace on namenode and perform checkpoint on secondary namenode.

Categories
SysOps

How to inspect Hadoop configuration using command-line

Inspect Hadoop configuration using command-line.

Categories
SysOps

How to mount HDFS as a local file system

Mount HDFS as a local file system.

Categories
SysOps

How to create Hadoop data nodes whitelist

Create Hadoop data nodes whitelist.

Categories
SysOps

How to leave Hadoop safe mode

The Hadoop cluster enters safe mode during the name node startup till the basic indicators are met and later in case of emergency, which means that the cluster enters read-only mode.

Categories
SysOps

How to install SmokePing on Debian Bullseye

Keep track of network latency using SmokePing on Debian Bullseye.

Categories
SysOps

How to limit the number of available processors

Use boot parameters to limit the number of available processors.

Categories
SysOps

How to decommission Yarn node

Decommission Yarn node with minimal impact on the running applications.

Categories
SysOps

How to manage custom DNS records on a Pi-hole instance

Use dnsmasq directly to manage custom DNS records on a Pi-hole instance.