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 decommission Yarn node

Decommission Yarn node with minimal impact on the running applications.

Categories
SysOps

How to decommission HDFS datanode

Decommission HDFS data node with minimal impact on the running applications.

Categories
SysOps

How to display Hadoop cluster report

Display Hadoop cluster report.

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SysOps

How to load native Hadoop libraries

Hadoop has a native implementation for certain components, but sometimes it does not load automatically.

Categories
SysOps

How to update Hadoop heartbeat interval

Update Hadoop heartbeat interval to mark data node as dead at the predefined period of time depending on your requirement.

Categories
SysOps

How to validate Hadoop configuration files

Validate Hadoop configuration XML files.