Bigdata

Hive bundle logs in a cloud data warehouse are stored under a predictable S3 path. Knowing where to look saves time when troubleshooting query performance or diagnosing failed jobs.

A quick walkthrough of using the Ranger REST API to bulk-delete existing users, including how to capture an auth cookie and loop through a user list with curl.

Learn how to enable Kerberos trace logging in Cloudera Manager’s credential generation scripts to diagnose authentication failures quickly.

Enabling HDFS encryption at rest adds per-file metadata overhead to the NameNode heap. This guide breaks down the memory impact and gives a practical rule of thumb for right-sizing your NameNode heap.

HDFS proxy users let you configure impersonation so specific users can submit jobs or access HDFS on behalf of others. This guide covers the core-site.xml properties, host and group restrictions, and Kerberos considerations for secure clusters.

Configure AES-NI accelerated encryption in transit for HDFS by setting the cipher suite and key length in hdfs-site.xml on both the NameNode/DataNode and client sides.